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Pars defect l4. Pars Defect Treatment at OPS Surgery Center A pars defect is a fracture or break in the vertebrae of the spine. This joint, like Spondyloysis (spon-dee-low-lye-sis) is defined as a stress fracture defect of the pars and can occur on the left, right or both sides of the bone. The Pars Defect Lumbar Spine Causes Treatments The Pars Defect Lumbar Spine Causes Treatments The Pars Defect Lumbar Spine: Causes & Treatments The lumbar spine, located in the lower back, plays a crucial role in supporting body weight, facilitating movement, and protecting the spinal cord. Spondylolysis (spon-dee-low-lye-sis) and spondylolisthesis (spon-dee-low-lis-thee-sis) are common causes of low back pain in children and adolescents who participate in sports that involve repeated stress on the lower back—such as gymnastics, football, and weight lifting. Pars Defect of Lumbar Spine: Causes & Treatments Pars defect, also known as spondylolysis, is a common issue. Feb 5, 2023 · Identify the etiology of pars interarticularis injury. Spondylolisthesis treatment lasts 4-8 weeks. A Pars defect is a condition characterized by a stress fracture or defect in a specific part of the vertebra known as the pars interarticularis. 06. It can sometimes lead to a condition called spondylolisthesis. Grade 1 Nov 7, 2024 · Lumbosacral spondylolysis (lumbar spondylolysis) is a unilateral or bilateral defect of the pars interarticularis that affects one or more of the lumbar vertebrae. They are paired, right and left Lumbar spondylolysis is a defect in the pars that may affect one or both sides and involve one or more vertebral bodies The cause is not fully known The pars may be congenitally defective or Undergo repetitive stress under axial Considerations for the pars interarticularis stress fracture Many different factors influence the spondylolysis/spondylolisthesis rehabilitation outcomes, including the grade of the defect/stress fracture. The L5 vertebra, located at the lowest segment of the lumbar spine, connects to the sacrum via the L5-S1 joint. The pars interarticularis is a thin bone segment joining two vertebrae. If the defect is bilateral, the vertebrae The L5 S1 Pars Defect Explained – Symptoms Treatments The L5 S1 Pars Defect Explained – Symptoms Treatments The lumbar spine, comprising five vertebrae labeled L1 through L5, plays a crucial role in supporting the upper body’s weight and facilitating movement. This condition can develop due to trauma, repetitive stress, or as a congenital defect present in about 5% of the population. Apr 1, 2024 · Slippage at l4-l5 region of your spine typically means you have spondylolysis or spondylolisthesis. What are the main causes of pars defect? What is Pars Defect? Pars defect, also referred to as spondylolysis or stress fracture, is a condition in which a fracture (break) occurs in the bony ring on the back of the vertebral or spinal column. It’s important to know the signs and get the right diagnosis to manage it well. A pars defect is a small break or fracture Apr 8, 2024 · Pars Defect Causes And Symptoms Since a pars defect is a form of stress fracture, the most common cause of onset is through repetitive movements or overstress on a particular area of the back. The term derives from the Greek words spondylos (vertebra) and lysis (defect). Spondylolisthesis is the medical term used to describe the forward slippage (anterior translation or displacement) of Learn how to manage pars defect with effective physiotherapy and chiropractic options treatment options to reduce pain and restore mobility. [2] Abstract Lumbar pars interarticularis (PI) injury or spondylolysis occurs only in humans. Feb 17, 2024 · Direct pars repair by PSHL is a reliable treatment for lumbar spondylolysis with a fusion rate of 84. Pain and stiffness in the middle of the lower back indicate pars defect among other conditions as well. Knowing why it happens and how to care for it is key to keeping your spine healthy. Association with SBO of the spondylolysis segment, a terminal stage of the defect, a wider defect gap, and grade III disc degeneration may be factors associated with non-fusion after direct pars repair of lumbar spondylolysis with PLSH. It gets its name from the part of the vertebra it affects – the pars interarticularis. This is often the result of A pars interarticularis injury (also known as a “pars defect”) is a condition that is commonly seen in young athletes who participate in sports requiring them to repetitively lean backwards, such as ballet, gymnastics or cricket. Dec 14, 2017 · Pars defect describes a crack or fracture in your pars interarticularis which is a small connecting bone in your lower spine. The lumbar spine anatomy has five vertebrae, from L1 to L5. The pars interarticularis is a small segment of bone that joins the superior and Jan 8, 2024 · These 5 exercises for lumbar spondylolisthesis will help you decrease your pain fast. There are Jan 30, 2017 · A pars defect is a problem that typically develops in the lumbar portion of the spine. It is a common cause of low back pain in children and adolescents. It is a type of spondylolisthesis, which is the general term for vertebral displacement. It is bilateral in 80% of symptomatic cases but can be unilateral defect as well which runs a more benign course. Spondylolysis and spondylolisthesis are relatively common causes of low back pain, especially in young athletes. The vast majority of these injuries are at the L5 bone, with the L4 level being the second most likely to be affected. It frequently causes a stress fracture called spondylolysis, which can compromise spinal stability and function. Pars repair could eventually become the standard of care in children. Damage to the pars interarticularis, called spondylolysis, can cause the posterior part of the vertebral arch to separate from the rest of the vertebrae. These fractures are interchangeably known as “pars defects” or “spondylolysis. Some pars defects are congenital, existing at birth, but others are caused by repetitive stress and strain to the lumbar spine that can take place during adolescence. Spondylolysis is a bony defect or fracture within the pars interarticularis of the vertebral arch in the spinal column. Both of these are a result of a pars defect or break. Get free rules, notes, crosswalks, synonyms, history for ICD-10 code M43. This represents a stress fracture of the PI. 1). Spondylolysis is common in young athletes The pedicle or “pars” is part of the vertebra that helps hold the body of the vertebra in place and when there is a defect in the portion of the vertebra, it can lead to a spondylolisthesis. Excessive loading in repetitive hyperextension is a significant risk factor and occurs most commonly at L5 followed by L4. This defect typically manifests as a stress fracture or a congenital abnormality, which can lead to spinal Oct 14, 2020 · Pars defect - A pars defect is a condition affecting the lumbar (lower) spine. They can be on one or both sides of the vertebrae. Mar 8, 2023 · A pars defect is a condition that affects the lumbar spine, which is the lower back area of the spine. It usually occurs in the lumbar spi Sep 6, 2022 · Spondylolysis, also known as a pars fracture, a spinal stress fracture injury common in athletes. Individuals with a pars defect frequently experience lower back pain and muscle stiffness, which can hinder daily activities. The pars interarticularis (pars) lies between the superior and inferior articular processes Jul 10, 2025 · Exercise can help alleviate spondylolisthesis pain. Learn about a few causes of this spinal condition. ". Outline the necessity of good communication between general health care practitioners and specialists and between these two Spondylolysis (Pars Fractures) and Lytic Spondylolisthesis Spondylolysis is a term used to describe a defect that can develop in a bony portion of the spine. Pars defect, also called lumbar spondylolysis, is a common cause of back pain. Duration should be as long as needed to reach functional goals and/or independent with home exercise programs and progressions. Spondylolysis deficient development or degeneration of a portion of the vertebra, usually in the pars interarticularis (the bone bridge between the superior and inferior facet joints of the lumbar vertebrae) leading to spondylolisthesis. They may also encounter tingling or numbness due to A pars defect is also called a pars fracture or spondylolysis. It helps manage and improve symptoms of pars defect (spondylolysis). A pars defect is a fracture between two joints in the vertebrae that form the pars interarticularis. It is the most likely area to be affected by repetitive stress. Spondylolisthesis, or slipped vertebra, is the forward slippage of one vertebra over the one under it. Learn which exercises to do, how to get started, and what safety considerations to keep in mind. Direct repair of the defect in the pars interarticularis using screws (typically performed on vertebrae between L1 to L4). Even so, patients with bilateral pars defects typically do not have instability develop at this level for many years. ” Research indicates the terms pars fracture, pars defect and spondylolysis are often used interchangeably. There is a pars interarticularis on each side of the vertebrae at the back of the spine. Learn more about PARS defect. The pars interarticularis is crucial for understanding lumbar spine issues. Sep 9, 2019 · A pars fracture occurs when the bony pars interarticularis breaks. This issue, also known as spondylolysis, affects the lower back’s stability and movement. This condition is Pars Defect Understanding Pars Defect: A Comprehensive Guide A “pars defect” refers to a defect or fracture in a part of the lumbar spine called the “pars interarticularis. Discussion Spondylolysis refers to an osseous defect within the posterior neural arch, most commonly within the pars interarticularis, an isthmus of bone located between the superior and inferior articular processes. Deficient development or degeneration of a portion of the vertebra, usually in the pars interarticularis (the bone bridge between the superior and inferior facet joints of the lumbar vertebrae) leading to spondylolisthesis. Pediatric Spondylolysis & Spondylolisthesis represent a continuum of disease where there is a fracture of the pars interarticularis (spondylolysis) which may progress to anterior subluxation of one vertebral body anterior to the adjacent inferior vertebral body (spondylolisthesis). Jul 19, 2023 · Anterolisthesis is a spinal condition characterized by the forward displacement of one vertebra over another. Oct 26, 2023 · Lumbar spondylolysis, a unilateral or bilateral stress fracture of the narrow bridge between the upper and lower pars interarticularis, is a common cause of low back pain (LBP) in adolescent athletes. What is a pars defect? The ‘pars’ is a small length of bone that joins the facet joints of one vertebra to the facet joints of the vertebra below it. In this condition, the bone that protects the spinal canal cracks due to repeated or excessive stress. How Spondylolysis/Pars Defect A pars defect or spondylolysis is a stress fracture of the bones of the lower spine. Pars defect. The spine specialists at Och Spine at NewYork-Presbyterian may take the following steps to find out what is causing your symptoms and determine if you have spondylolysis of the cervical or lumbar spine. These fractures typically occur due to overuse. ” The pars interarticularis is a small, thin piece of bone that connects the vertebrae’s upper and lower joint processes in the lower back. This occurs most often in the lumbar spine vertebrae or lower back (L1 to L5). The lifetime prevalence of LBP in those aged 11-17 years has been reported to be as high as 30. Patients with bilateral pars defects are at risk for spondylolisthesis, while unilateral pars defects generally do not lead to slippage [33 •, 34]. This condition affects an area of the spine called the pars interarticularis. Symptoms of low back Spondylolysis refers to a defect in the short, flat strip of bone called pars interarticularis (or pars). Lumbar Spondylolysis/ Listhesis Rehabilitation Guideline This rehabilitation program is designed to return the individual to their activities as quickly and safely as possible. This diagnosis is typically found in the lumbar spine, but may also be located in the cervical spine depending on the patient’s presentation. It most commonly affects the lumbar vertebrae, but has also been reported in the cervical and thoracic region [1]. . Jun 26, 2025 · Adult Isthmic Spondylolisthesis is a common adult spinal condition characterized by subluxation of one vertebral body anterior to the adjacent inferior vertebral body, caused by a defect in the pars interarticularis. It affects an area of bone called the pars interarticularis. If degenerative disc disease sets in or there is a significant slip (spondylolisthesis – not spondylolysis), the surgical repair of the pars fractures may be ineffective in relieving lower back pain. Grade II anterolisthesis of L4 over L5 vertebra is seen with pars interarticularis defect, disrupting the usual 'Scottie dog' appearance. But spondylolysis can also occur in Nov 14, 2017 · Pars defect is a condition affecting the part of the vertebra in the lumbar spine (lower back), called the pars interarticularis, which is a small section of bone that joins the facet joints in the spine. This guide covers how to identify and manage this persistent condition. 16. This condition is particularly prevalent among adolescents and athletes, affecting their ability to perform and engage in daily activities. It happens when the pars interarticularis in the lower spine gets weak or breaks. Gross anatomy In the axis and the thoracolumbar spine, the pars interarticularis ICD 10 code for Spondylolisthesis, lumbar region. a 22 gauge 3. Pars defect may be present since childhood without any presenting complaints. A pars defect can also cause radiated pain in the buttock, thighs, or the backs of your legs. Feb 6, 2024 · The definition of spondylolysis must also point out that the defect may be on one side of the pars interarticularis (known as unilateral spondylolysis) or on both sides (known as bilateral spondylolysis). It’s a stress fracture in the L5 S1 area. Discusses the anatomy of the pars interarticularis, its role in spinal stability, and the potential causes of pars interarticularis defects. Pars defect can cause symptoms that may mimic other spine conditions. Understanding the Chronic L5 Pars Defect A chronic L5 pars defect involves the pars interarticularis, a small bone connecting the upper and lower spine joints. These three terms are used interchangeably, all referring to the same condition. It covers These fractures most commonly affect the lumbar spine (lower back) and can cause pain and instability. Lumbar spondylolysis is a unilateral or bilateral defect of the pars interarticularis, an isthmus of bone connecting the superior and inferior facet surfaces in the lumbar spine at a given level. These vertebrae carry a lot of weight and help with movement. It may cause difficulties in some persons involved in sports, athletics and similar activities that demand rigorous movements of spine and particular L5 is the most common location for spondylolysis (85–95%), and the remaining cases are typically observed at L4 or L3 [32]. ” Many risk factors have been proposed to explain the progression of a spondylolytic defect to IS Spondylolysis, or lumbar stress fracture, is a fracture of a section of the lumbar spine. Spondylolysis most commonly affects the L5 level (in 85 ” 95% of cases) with the majority of the Nov 23, 2012 · Unilateral spondylolysis, a unilateral osseous defect or fracture in the pars interarticularis, is a rare and unique entity that accounts for 3–33% of all cases of spondylolysis [1 – 3], which occurs in approximately 3–7% of the general population [4 – 9]. Spondylolysis is defined as a bony defect in the pars interarticularis of the vertebral arch. See also Anaplastic Astrocytoma Recurrence Risks & Data Sep 29, 2025 · Save. [3] The lumbar vertebra consist of a body, pedicle, lamina, pars interarticularis, transverse process, spinous process and superior and inferior articular Overview Spondylolysis is the medical term for a spine fracture or defect that occurs at the region of the pars interarticularis. May 24, 2014 · Exercises focusing on strengthening and improving the range of motion of the back, abdomen and legs help relieve pain caused by spondylolisthesis. The most common area for a pars defect to develop is in the lower spine, as this area generally handles more stress during everyday movements. ICD 10 code for Spondylolysis, lumbar region. This includes exercises, nutrition, and ways to prevent future problems. The pars is located at the back of the spine and forms a bridge (or isthmus) between the upper and lower joint surfaces of each facet of a vertebra (spinal bone). Spondylolysis refers to a weakening or other defect in a specific region of the vertebra called the pars interarticularis. Although the aetiology of this Feb 4, 2009 · Does or can anyone suggest a Diagnostic code for "L5 Pars Defect"? Also, a Procedure code for a Corticosteroid injection for the above. Lumbar spinal fusion surgery: a surgery designed to stop the motion at a painful vertebral segment in the low back. Using linear regression analysis to correct for age, race, and sex, we compared disc degeneration at L4-L5 in L4 pars defects with the degree of degeneration seen at L5-S1 from a L5 pars defect (Fig. See the images below. The lumbar vertebrae are in the lower back (closest to the tailbone), and are where spondylolysis usually happens. Pars interarticularis defect (otherwise referred to as spondylolysis) represents a common cause of axial back pain in adolescents, especially in the case of young athletes. Apr 22, 2019 · Pars Defect is also known as par interarticularis defect or pars fracture of the lumbar spine. Lumbar Spine Pars Defect Causes & Care Lumbar Spine Pars Defect Causes & Care Lumbar spine pars defect is a big worry in spinal health. It is most common, however, in vertebrae L4 and L5 – the lowest two segments of the lumbar portion of the spine. Review the appropriate management options available for each stage of pars interarticularis injury. " Thank you. Positive predictors of pars defects spontaneous-ly healing include unilateral defects, earlier fracture stage, and lumbar level other than L5 [85]. Among various spinal conditions, a pars defect — also known as spondylolysis — is a common cause of Jun 21, 2025 · Isthmic anterolisthesis occurs when there is a defect or fracture in a specific part of the vertebra called the pars interarticularis. Most commonly, this occurs in the lumbar spine. Summarize key points in evaluating pars interarticularis injury, including medical history and physical examination. The vast majority of spondylolysis occur in the lumbar vertebrae, however it can also be seen in cervical vertebrae. Jun 20, 2021 · A pars interarticularis defect is a unilateral or bilateral fracture involving the pars interarticularis of the posterior vertebral arch. Aug 5, 2014 · Question: For a patient who is diagnosed with lumbar pars defect, can we report code 64493 for a lumbar pars injection? Is this the correct CPT® code? North Carolina Subscriber Answer: You are correct to report code 64493 (Injection [s], diagnostic or therapeutic agent, paravertebral facet [zygapophyseal] joint [or nerves innervating that joint] with image guidance [fluoroscopy or CT], lumbar Isthmic spondylolisthesis (IS) is defined as the anterior translation of one lumbar vertebra relative to the next caudal segment as a result of a unilateral or bilateral fracture of the pars interarticularis. Spondylolysis Introduction Spondylolysis is a unilateral or bilateral bony defect in the pars interarticularis or isthmus of the vertebra. While good clinical outcomes with conservative treatment do not necessarily depend on the bony healing of the lesion, osseous union should still be an objective because this reduces the risk of Feb 4, 2025 · Anterolisthesis may occur when there is a defect or fracture of the pars interarticularis, which is the bony bridge that connects the superior and inferior facet joints of two contiguous vertebrae. This activity highlights the interprofessional management of this condition. Have Joint Problems that Cause Pain, Recent Fracture or Fracture Caused by Osteoporosis or Cancer, Displaced Vertebra and/or Spondylolisthesis/Pars Defect Spondylolysis is also called "pars defect" because the pars interarticularis is the part that is fractured. The General Considerations The pars interarticularis is the bridge of bone that connects the superior and inferior articulating facets. This can cause a lot of pain in the lower back, especially when you move a lot. This condition is commonly seen in the lower spine, typically in the lumbar region. At OPS Surgery Center, our spine and pain Understanding Pars Defect: Symptoms and Causes A pars defect is a frequent spinal injury that results from a stress fracture in a small part of the vertebra, often leading to significant pain and limited mobility. It can also lead to nerve problems if it affects the spinal cord or nerves. A spondylolisthesis occurs when the vertebra is displaced (“slipped”), typically in the anterior Feb 19, 2014 · Spondylolisthesis at the L5 level (most commonly of pars interarticulares defect origin) found 74% attained maximum improvement in less than 20 visits and the remainder treated more than 20 visits. This type of spinal fracture causes spondylolisthesis; a forward slip or slide of one vertebral body over the one beneath. Here’s what to know about the condition. The Lumbar Spine Pars Defect Causes Care The Lumbar Spine Pars Defect Causes Care The lumbar spine, a critical component of the human body’s musculoskeletal system, provides essential support for the upper body, facilitates movement, and protects the spinal cord. 3). A diagnosis of lumbar spondylolysis is defined as the presence of a fracture, typically located at the pars interarticularis region of the vertebra. This condition is present in up to 6% of the population 1. Jul 14, 2025 · Spondylolysis, commonly known as pars interarticularis defect or pars defect, is a defect in the pars interarticularis, the portion of the vertebral arch that connects the superior and inferior articular facets. Mar 9, 2023 · Healthcare providers sometimes refer to spondylolysis as pars defect or pars fractures because it affects your pars interarticularis — the tiny ridges of bone that link your vertebrae together. Pars Defect is one of the common causes of back pain in adolescents. If it gets stressed or damaged, a pars defect or spondylolysis can happen. It happens when the pars interarticularis area in the lower back gets a stress fracture or gets thinner. In this condition, the bone that protects the spinal canal fractures as a result of excessive or repeated stress. A defect in the pars interarticularis is a common cause of lower back pain and can result in pain when walking and stiffness in the lumbar region. Spondylolisthesis refers to anterior slippage (displacement) of the vertebrae. The severity of this condition is classified into different grades, which help healthcare professionals understand the extent of the displacement and guide treatment decisions. This is a stress fracture of the narrow bridge of bone between the facet joints (pars interarticularis) at the back of the spine, commonly called a pars defect. Another term for spondylolysis is “pars fracture” or “pars defect”. Stress fracture. It presents a weakness or stress fracture in one of the bony bridges that connects the upper with the lower facet joints. Pars defect is closely Sep 16, 2015 · Spondylolysis, also known as a pars defect, happens when a crack forms in the bony ring on the back of the spinal column. Diagnosis Bilateral L5 spondylolysis with Grade I spondylolisthesis of L5 on S1. Use tests/measures and clinical decision mak Mar 9, 2025 · The pars interarticularis or simply pars (plural: partes interarticulares) is the part of a vertebra located between the superior and inferior articular processes. The pars interarticularis (pars) lies between the superior and inferior articular process bilaterally at each vertebral level. Find relief at NU-Spine: The Minimally Invasive Spine Surgery Institute. It most often occurs in the lower back (lumbar spondylolysis) but can also affect the neck's bones (cervical spondylolysis). Also known as: Pars Defect Lumbar Stress Fracture Spondylolysis and Spondylolisthesis This range includes codes for spondylolysis and spondylolisthesis, which are critical for coding lumbar spine conditions. Bilateral Pars Defect L5-S1: Causes & Treatments Learning about bilateral pars defect at L5-S1 is key for good spine health. Spondylolysis is a stress fracture through the pars interarticularis of the lumbar vertebrae. L5 S1 Pars Defect Explained – Symptoms & Treatments A common spinal issue is the L5 S1 pars defect. What is spondylolysis? Spondylolysis. Spondylolysis is a fracture in the part of the vertebra called the pars (or pars interarticularis). A breakdown in the “pars” bony tissue caused by trauma, genetics, or disease can be called a spondylolysis. This injury occurs almost exclusively in the lower lumbar region, most often at L5. The most common form of this is L5 spondylolysis (which affects the fifth, lowest lumbar vertebra), followed by spondylolysis of the fourth vertebra (L4). Spondylolysis presents predominantly in the lower lumbar segment, where the concentration of mechanical stress is high. What is pars defect rehabilitation? Pars defect rehabilitation is about using physical therapy and recovery methods. This condition often leads to lower back pain, especially in teens and athletes. The pars interarticularis is region between the facet joints of the spine, and more specifically the junction of the superior facet and the lamina. Among various structural issues affecting this region, pars defects—also known as spondylolysis—stand out as a common cause of Detailed step by step desription of Primary repair with pars screw for Spondylolisthesis - Type 1 located in our module on Spondylolisthesis 4 days ago · Spondylolisthesis with Pars Fracture The provider documented, “Displaced pars fractures of L5 with resulting isthmic spondylolisthesis (vertebral slippage) of L5-S1 due to the fractures. What are the symptoms of pars defect? The main symptom of pars defect is lower back pain. The L4 Pars Defect Symptoms Treatment The L4 Pars Defect Symptoms Treatment The L4 pars defect is a specific spinal condition that affects the pars interarticularis, a small segment of bone connecting the upper and lower facets of the vertebra at the L4 level of the lumbar spine. rs Defect/Spondylolithesi Therapy Usually two times a week. This resource provides essential information for patients, caregivers, and healthcare professionals on managing pars interarticularis injuries. The most common cause of low back pain is muscular, secondary to overuse or deconditioning. This defect can either be asymptomatic or associated with significant low back pain (LBP). cluded, but all could be appropriate for this patient population. Spondylolysis most commonly affects your lower back (lumbar spine), but it can also happen in the other sections of your spine — in your neck (cervical spine) or middle back (thoracic spine). Spondylolysis is estimated to affect up to 7 percent of people in the United States. This type is more common in younger athletes who participate in sports requiring repetitive back extension, such as gymnastics or football. Feb 13, 2024 · Spondylolysis (Pars Defect) Spondylolysis, a condition often discussed in the context of spinal health, is characterized by a defect or fracture in one or more of the vertebrae that make up the spinal column. 95% responded in less than 90 days, the marker connoting the crossover to a chronic pain condition. When caused by trauma, one part of the spine can act as a lever, leading to a break in an adjacent vertebra. Spondylolysis (pars defect) is a stress fracture affecting a part of the vertebra called the pars interarticularis. Understanding Chronic Pars Defect: Diagnosis and Treatment Chronic pars defect, or spondylolysis, is a common stress fracture in the pars interarticularis of the spine. These defects may be caused by repetitive stress. There may be a hereditary aspect to spondylolysis, for example an individual may be born with thin vertebral bone and therefore be vulnerable to this condition; or certain sports, such as gymnastics, weight lifting and football can put Jun 8, 2021 · Symptoms, Treatment, & Causes Summary Explores the topic of pars interarticularis defect, a condition that involves a stress fracture or bony defect in a specific area of the vertebrae. This comprehensive document aims to provide an in-depth understanding of the diagnosis and treatment of pars fractures. Defects can be found at more than one level in 4% of patients [29, 33]. 2%. The defect is actually a stress fracture that occurs in a portion of the spine called the “pars”. Patients can also be born with a congenital defect in this area and develop symptoms much later in life when The defect in the pars at L5 can lead to an isthmic type spondylolisthesis at the L5-S1 level, which in turn, may contribute to disc degeneration (Fig. The pars interarticularis is a small bone part that connects the spine’s upper and lower facets. Anatomically, one can describe the pars as the region between two, one superior and one inferior Mar 1, 2019 · The injury to the pars, sometimes called a "pars defect" or "pars fracture") may occur at one or both sides of vertebrae in any section of the spine. 5 inch spinal needle was then advanced into the right L5 pars defect at the superior and middle aspect. ggpk 3r lf1gay emxh3l2 elpp0r1a rx gbnro zzwz bpqk0g 8is