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To enhance your diagnostic reasoning skills, follow these steps:
- Review the Information: Carefully read through the content in each section of the case scenario.
- Consider the Question: Reflect on the Diagnostic Reasoning Question presented. Take your time to think about your answer.
- Compare Your Answer: Attempt to answer the question before viewing our suggested answer. When ready, click “View Suggested Answer” to compare it with your own.
Repeat these steps for each section of the case scenario. Please note that the suggested answers are only indicative and not exhaustive. They serve as guidelines and should not be considered complete answers.
Patient’s History
In the sections below, you will find case history information designed to guide you through a systematic approach to performing a focused and relevant case history. This process will help you narrow down the potential causes of the patient’s complaint. As you go through the material, we encourage you to answer the questions provided to test and enhance your diagnostic reasoning skills.
Who is the patient and where is the pain?
When was the onset and what caused the onset?
Amir is a 44-year-old carpenter who presents with pain in his right buttock and posterior thigh. He reports that the pain began three weeks ago, immediately following a fall from a ladder, during which he landed on his right buttock.
Diagnostic Reasoning Question
What differential diagnoses would you consider for Amir?
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- Gluteal muscle contusion
- Bone contusion (e.g., sacrum or ischium)
- Fracture of the sacrum, ischium, or upper femur
- Sacroiliac joint sprain or dysfunction
- Hip joint sprain or dysfunction
- Deep gluteal syndrome (e.g., piriformis syndrome)
- Myofascial pain syndrome involving the piriformis or gluteal muscles
- Lumbar spine sprain or dysfunction
- Disc herniation with radiculopathy
What are the pain characteristics?
What are the aggravating and relieving factors?
What has been the course of the pain?
Amir reports that his buttock pain was initially quite severe, rating it as an 8 out of 10 in intensity. Within a few days, it improved to about a 5 out of 10 and has been at that level ever since. He reports that the quality of his pain also changed within the first few days from a sharp pain to a deep ache.
He describes his posterior thigh pain as mild, with a burning quality and occasional tingling. His buttock pain and posterior thigh symptoms become worse when he sits for prolonged periods and applies pressure to his right buttock. He reports that hip movements, such as an abrupt change of direction when walking, aggravate his pain. He feels relief by limiting his activities and applying ice to the buttock region. He does not have any lower back pain or stiffness.
Diagnostic Reasoning Question 1
What factors might have contributed to the change in the quality and intensity of Amir’s pain?
ViewHide Suggested Answer
A transition from sharp pain to a deep ache suggests a shift in the underlying pathology or progression of a condition. It is common for a sharp and intense pain to gradually subside over time, evolving into a more persistent ache or discomfort. Factors that might contribute to the change in the nature of the patient’s pain include:
- Resolution of Inflammation – Initial intense pain often arises from inflammation or tissue damage. Over time, as inflammation resolves and tissue repair progresses, the intensity of pain decreases, resulting in a more constant, dull ache.
- Adaptation and Compensation – The body may adapt to accommodate the underlying injury or condition, resulting in changes in pain perception. This adaptation process can lead to a shift from an initial sharp and intense pain to a more tolerable but constant ache.
Diagnostic Reasoning Question 2
How do the aggravating and relieving factors contribute to the diagnostic process?
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Pain that worsens with activity and improves with rest and the application of ice typically points to a mechanical or inflammatory disorder. The combination of symptoms, particularly the burning sensation and tingling in the posterior thigh, along with symptom aggravation from prolonged sitting and local pressure, strongly suggests the possibility of sciatic neuropathy.
Are there any associated symptoms?
Upon further questioning, Amir reports having difficulty sleeping most nights due to the pain.
Diagnostic Reasoning Question
What is the significance of nocturnal pain in this patient?
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Nocturnal pain is a red flag and warrants careful evaluation. Given Amir’s history of trauma, there is a possibility of a fracture involving the sacrum, ischium, or upper femur. Additionally, his nocturnal pain could be attributed to the aggravation of a muscle or bone contusion or a sacroiliac or hip joint sprain, particularly when lying on the affected side.
Is there any past history that may be relevant to the current complaint?
Amir’s past history includes recurrent episodes of mild low back pain, each resolving within a week. Since adopting the use of a lumbar brace at work, the frequency and intensity of his low back pain have decreased. Importantly, he has never previously experienced right buttock pain or pain and tingling in his right posterior thigh before this current episode.
Diagnostic Reasoning Question
How might his past history influence the diagnostic process?
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Amir’s occupational demands predispose him to musculoskeletal injuries, making them a significant factor in his overall health. However, the absence of a previous history of similar complaints, combined with the specific mechanism of onset, suggests that his current symptoms are likely unrelated to his past low back pain episodes.
Are there any red flags?
The following questions are asked to identify any “red flags” that could suggest serious pathology. Even if the patient has previously mentioned related information during the case history, it is recommended to revisit these questions to ensure a comprehensive evaluation.
- Do your symptoms disappear even for a short time? “I have less pain when I rest in bed and when I apply a cold pack, the pain improves significantly.”
- Does the pain wake you up at night? “Most nights, the pain wakes me up and I have difficulty getting back to sleep.”
- Have you had any bladder or bowel problems since the onset of your pain? “No.”
- Do you feel any weakness in your legs? “No.”
- Have you recently had any fever, chills, or night sweats? “No.”
- Have you recently had an infection or other illness? “No.”
- Have you recently had any unexplained weight loss? “No.”
Diagnostic Reasoning Question
Do any of the patient’s answers raise a red flag?
ViewHide Suggested Answer
Generally, nocturnal pain is considered a red flag. However, since this patient does not experience it every night, the pain is more likely due to a sleeping position that aggravates an already painful structure. Nonetheless, it would be prudent to perform imaging to rule out any serious underlying conditions, such as fractures.
Differential Diagnosis
Diagnostic Reasoning Question
Based on the available history, how would you prioritize the list of differential diagnoses?
ViewHide Suggested Answer
- Gluteal muscle contusion
- Bone contusion (e.g., sacrum or ischium)
- Sacroiliac joint sprain or dysfunction
- Hip joint sprain or dysfunction
- Deep gluteal syndrome (e.g., piriformis syndrome)
- Myofascial pain syndrome involving the piriformis or gluteal muscles
- Lumbar spine sprain or dysfunction
- Disc herniation with radiculopathy
- Fracture of the sacrum, ischium, or upper femur
Reflection Point
Pause and consider whether the key elements of a thorough and relevant patient history have been addressed. Are there any additional questions you would have asked? If so, what are they, and why would they be important?
Before reviewing the physical examination findings below, take a moment to reflect on which physical examination procedures you would perform to accurately assess this patient.
Physical Examination
In the sections below, you will find physical examination findings for this patient. The material outlines a systematic approach to conducting a focused and relevant physical examination aimed at narrowing down the potential causes of the patient’s complaint. As you review the material, we encourage you to answer the questions provided to test and enhance your clinical reasoning and diagnostic skills. Additionally, consider whether all essential elements of the physical examination have been thoroughly addressed.
Vital Signs
Amir’s vital signs are within normal limits.
Diagnostic Reasoning Question
What is the significance of normal vital signs?
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Normal vital signs typically indicate that there are no immediate life-threatening conditions. Particularly, normal temperature indicates the absence of acute infection.
Inspection
He appears to be in good health. The buttock region is inspected and shows no evidence of bruising, swelling, or deformity. A supine inspection reveals a slight external rotation of the right hip.
Diagnostic Reasoning Question 1
What does the absence of bruising, swelling, or deformity in this patient indicate?
ViewHide Suggested Answer
Considering the nature of the trauma, bruising and swelling would normally be expected. However, since the injury occurred three weeks ago, any bruising or swelling would likely have resolved by now. The absence of deformity is a reassuring sign, as its presence would have indicated significant structural damage.
Diagnostic Reasoning Question 2
What does Amir’s slight external rotation of the right hip suggest, and how does this finding contribute to understanding the potential underlying condition in this patient?
ViewHide Suggested Answer
The slight external rotation of Amir’s right hip may suggest a compensatory mechanism or increased tension in the hip external rotators, such as the piriformis muscle. When muscles like the piriformis become excessively tense or hypertonic, they can lead to symptoms such as buttock pain and posterior thigh discomfort. Combined with the patient’s reports of a burning sensation and occasional tingling in the posterior thigh, these findings raise the possibility of deep gluteal syndrome.
Range of Motion
Assessment of the lumbar active range of motion reveals normal findings. On assessment of the right hip range of motion, both passive and active evaluations reveal a loss of internal rotation, accompanied by a slight increase in discomfort in his right buttock.
Diagnostic Reasoning Question
How do the hip range of motion findings inform the diagnostic process?
ViewHide Suggested Answer
The observed loss of hip internal rotation, coupled with increased discomfort in the right buttock, provides further evidence for the involvement of the hip external rotator muscles. This finding is consistent with conditions affecting the hip’s external rotators, such as piriformis syndrome or other deep gluteal pathologies.
Palpation
Palpation of the lumbopelvic region, including a functional examination of the lumbar vertebral motion segments and sacroiliac joints, reveals normal findings. However, applying firm pressure to the right buttock, specifically between the edge of the sacrum and the greater trochanter, results in localized pain and a tingling sensation in the right posterior thigh.
Diagnostic Reasoning Question
How do the localized pain and posterior thigh tingling, triggered by pressure applied between the edge of the sacrum and the greater trochanter, contribute to the diagnostic process?
ViewHide Suggested Answer
These findings strongly suggest the involvement of the piriformis muscle and the sciatic nerve.
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Neurological Examination
A screening neurological examination for the L2 to S1 nerve roots is performed and is found to be normal.
Diagnostic Reasoning Question
How does the normal L2 to S1 nerve root examination inform the diagnostic process?
ViewHide Suggested Answer
A normal L2 to S1 nerve root examination suggests that lumbar radiculopathy is unlikely to be the cause of the patient’s symptoms. This finding helps narrow down the potential sources of pain, directing attention away from nerve root compression in the lumbar spine and toward other possible musculoskeletal or peripheral nerve issues.
Please watch the video below to see how a Neurological Examination for L2 to S1 Nerve Roots is performed.
Reflection Point
Considering the patient’s history and examination findings thus far, take a moment to reflect on which special tests would be most appropriate to further evaluate this patient.
Special Tests
The Active Piriformis test is performed, and it aggravates Amir’s right buttock pain and posterior thigh symptoms.
Diagnostic Reasoning Question
What do these results indicate?
ViewHide Suggested Answer
These results indicate a positive outcome for the Active Piriformis test, suggesting the presence of Deep Gluteal Syndrome. To see how the Active Piriformis test is performed, please watch the video below.
The Seated Piriformis Stretch test also exacerbates his right buttock pain and posterior thigh symptoms.
Diagnostic Reasoning Question
What do these results indicate?
ViewHide Suggested Answer
These findings indicate a positive result for the Seated Piriformis Stretch test, further supporting the diagnosis of Deep Gluteal Syndrome in this patient. To see how the Seated Piriformis Stretch test is performed, please watch the video below.
The Freiberg test is performed, and it also results in an aggravation of Amir’s right buttock pain and posterior thigh symptoms.
Diagnostic Reasoning Question
What do these results indicate?
ViewHide Suggested Answer
These findings indicate a positive result for the Freiberg Test, providing more evidence for the presence of Deep Gluteal Syndrome. Please watch the video below if you wish to see how the Freiberg test is performed.
The Pace Maneuver is performed and found to be positive.
Diagnostic Reasoning Question
What does the result of this test indicate?
ViewHide Suggested Answer
A positive result for this maneuver provides additional evidence supporting the diagnosis of Deep Gluteal Syndrome. To see how the Pace Maneuver is performed, please watch the video below.
The Beatty Maneuver is performed and found to be positive.
Diagnostic Reasoning Question
What does a positive Beatty Maneuver indicate?
ViewHide Suggested Answer
A positive result for this maneuver helps confirm the presence of Deep Gluteal Syndrome. Please watch the video below to see how the Beatty Manoeuvre is performed.
The Sacroiliac Compression and Sacroiliac Distraction tests are performed and found to be negative.
Diagnostic Reasoning Question
How do these results inform the diagnosis?
ViewHide Suggested Answer
Negative results for the Sacroiliac Compression and Sacroiliac Distraction tests help rule out sacroiliac joint involvement. To see how these tests are performed, please watch the videos below.
Reflection Point
Please pause and assess whether all the essential elements of a thorough and relevant physical examination have been completed for this patient. Are there any additional procedures you would have performed? If so, why?
Imaging
Magnetic Resonance Imaging (MRI) reveals an enlarged right piriformis muscle and edema in the right sciatic nerve.
Diagnosis
Diagnostic Reasoning Question
Based on the available information, what is the most likely diagnosis?
ViewHide Suggested Answer
Deep gluteal syndrome caused by piriformis injury.
References and Suggested Further Readings
Carro L. et al. Deep gluteal space problems: piriformis syndrome, ischiofemoral impingement and sciatic nerve release. Muscles Ligaments Tendons J. 2016 Dec 21;6(3):384-396.
Park J. et al. Deep gluteal syndrome as a cause of posterior hip pain and sciatica-like pain. Bone Joint J. 2020 May;102-B(5):556-567.
Miller T. et al. The diagnosis and management of Piriformis Syndrome: myths and facts. Can J Neurol Sci. 2012 Sep;39(5):577-83.
Hopayian K. et al. The clinical features of the piriformis syndrome: a systematic review. Eur Spine J. 2010;19(12):2095. Epub 2010 Jul 3.
Shah S. Piriformis Syndrome. www.emedicine.medscape.com.
Johnson R. Approach to hip and groin pain in the athlete and active adult. www.uptodate.com.
Disclaimer: The acemsk.com website (including text, graphics, downloadable resources, and videos) is intended to provide general health information for educational purposes only. This information is not a substitute for personal consultation with a qualified healthcare professional. Always seek the advice of a healthcare professional for any questions regarding your condition, symptoms, and appropriate treatments.
Copyright © Educom Pty Ltd: All content on the acemsk.com website, including text, graphics, videos, and downloadable files, is the property of Educom Continuing Education, a division of Educom Pty Ltd, and is protected by copyright and other intellectual property laws under international conventions. Unauthorized use or duplication of this material without express written permission from Educom Pty Ltd is strictly prohibited.
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