Transient Osteoporosis of the Hip (TOH) is a self-limiting condition characterized by sudden onset of hip pain, a limp, and a reversible loss of bone density. While it shares some features with CRPS—such as localized sympathetic-like changes and severe pain—it is...

In a physical medicine and rehabilitation (PM&R) or pain practice, many patients present with complaints of "stiffness" or "clumsiness." While these can be symptoms of common MSK conditions like osteoarthritis or rotator cuff pathology, they are also the hallmark...

Osteoid osteoma is a small, benign, bone-forming tumor that typically affects children and young adults (ages 5–25). While it is not cancerous and does not metastasize, it can cause significant morbidity due to intense pain and secondary skeletal issues like...

Foot pain often presents with vague, burning sensations that can be difficult for patients to localize. For the board-certified physician, the distinction lies in the anatomical "bottleneck"—is the compression occurring at the fibro-osseous tunnel of the ankle (Tarsal...

Snapping Hip Syndrome is a clinical condition characterized by an audible or palpable "snap" or "click" that occurs during hip movement, specifically during flexion and extension. While often a painless annoyance, it can lead to secondary bursitis and significant...

PVNS is a rare, benign, but locally aggressive neoplastic process characterized by the proliferation of the synovium in joints, tendon sheaths, and bursae. It is characterized by the deposition of hemosiderin, which gives the tissue a characteristic brown/rust color...

DISH is a systemic condition characterized by the ossification of ligaments and entheses, primarily involving the Anterior Longitudinal Ligament (ALL) of the spine. While it is often asymptomatic and discovered incidentally, it can lead to significant spinal...

Parsonage-Turner Syndrome is an idiopathic inflammatory plexopathy that primarily affects the brachial plexus. It is characterized by the sudden onset of excruciating shoulder pain, followed days or weeks later by profound muscle weakness and atrophy. For the...

Avascular Necrosis (AVN) is a condition characterized by the death of bone components due to an interruption of blood supply. While it can occur in various bones (such as the scaphoid or talus), the femoral head is the most clinically significant and frequently tested...

Paget’s disease of bone is a localized disorder of bone remodeling that begins with excessive bone resorption followed by an increase in bone formation. This results in a disorganized architectural structure of woven and lamellar bone that is mechanically weak, highly...

Heel pain is one of the most common musculoskeletal complaints, with plantar fasciitis affecting approximately 10% of the population at some point in their lives. While often labeled as an inflammatory "itis," chronic plantar fasciitis is more accurately described as...

Ankle sprains are among the most common musculoskeletal injuries encountered in both sports medicine and general clinical practice. While often dismissed as minor injuries, improper management can lead to chronic ankle instability (CAI), proprioceptive deficits, and...

Patellofemoral Pain Syndrome (PFPS) is one of the most common causes of anterior knee pain, particularly in adolescents and young active adults. Often referred to as "Runner's Knee," it is a diagnosis of exclusion characterized by pain behind or around the patella....

The knee is a complex hinge joint that relies on the menisci for shock absorption, load distribution, and joint stability. In the pain management and PM&R setting, distinguishing between an acute, traumatic meniscal tear and chronic, degenerative meniscal changes...

Greater Trochanteric Pain Syndrome (GTPS) is a common clinical condition characterized by pain and tenderness over the lateral aspect of the hip. Historically, this was almost exclusively attributed to "trochanteric bursitis." However, contemporary imaging and...

Hip pain is a common diagnostic challenge in both PM&R and Pain Medicine. Because the hip joint is located deep within the soft tissue, pain generators can be difficult to localize. For the board-certified physician, the key is recognizing the "C-sign"...

Carpal Tunnel Syndrome (CTS) is the most common entrapment neuropathy of the upper extremity. It results from the compression of the median nerve as it passes through the fibro-osseous carpal tunnel at the wrist. For the board-certified physician, diagnosing CTS...

Epicondylitis is a misnomer that frequently appears on board exams. While the suffix "-itis" implies an inflammatory process, histological studies of chronic "Tennis Elbow" and "Golfer’s Elbow" consistently show a lack of inflammatory cells. Instead, these conditions...

Adhesive capsulitis is a condition characterized by spontaneous onset of pain and a progressive, global loss of both active and passive glenohumeral range of motion. Unlike rotator cuff tears, where passive motion is often preserved, adhesive capsulitis involves a...

The shoulder is the most mobile joint in the human body, a characteristic that inherently sacrifices stability for range of motion. For the board-certified physician, diagnosing shoulder pain requires a systematic approach to the "secondary stabilizers"—the rotator...