Salt and pepper skull.

Hyperparathyroidism/Renal Osteodystrophy

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Findings –Subperiosteal resorption along radial aspects of middle phalanges, especially 2nd and 3rd –Brown tumors (lytic lesions) –Soft tissue Ca+ –Acroosteolysis –Cortical tunneling, osteopenia, subchondral resorption mimicking erosions –Occasionally, diffuse...
Scleroderma

Scleroderma

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Findings –Atrophy and tapering of soft tissues of fingers –Acroosteolysis –Subcutaneous Ca+ or joint Ca+ –Erosions (late finding) with predilection for PIP and DIP –Flexion contractures –Very distinctive feature is...
Blade-of-grass sign. 

Paget Disease

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  Blade of grass: V-shaped lucency in metadiaphysis, usually in long bone, representing lytic phase Most often seen in femur and tibia In skull,...
bilateral posterior hip dislocations

Posterior Hip Dislocation

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Usually, result of MVA 90% posterior, +/- posterior wall or column acetabular fx The mechanism is the posterior force on a flexed hip ...
Frontal radiograph of shoulder shows a humeral head in internal rotation (lightbulb sign), decreased distance between humeral head and glenoid and a “trough fracture” or “reverse Hill-Sachs” deformity of the medial humeral head.

Posterior Shoulder Dislocation

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Causes: electrocution and seizures Findings –Trough sign: vertical compression fx of anteromedial humeral head –Rim sign: widening of glenohumeral joint > 6 mm –Absent crescent sign:...

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Musculoskeletal trauma

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SECTION 1: Vocab: • • Stress Fracture is abnormal stress on normal bone. Insu(ficiencvFracture is normal stress on abnormal bone. Fracture Healing: In general, bones heal in about 6-8 weeks, but...
subchondral erosions of the fourth left distal interphalangeal joint and right third and fourth proximal interphalangeal joints with periosteal reaction.

Psoriatic Arthritis

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Psoriatic and reactive arthritis –Erosive and productive change (also seen in erosive OA) –Erosions have fuzzy margins and wisps of periostitis –Distal predominance and soft tissue swelling –In...
Erosive osteoarthritis.

Erosive Osteoarthritis

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Inflammatory form of OA that affects postmenopausal middle aged women Often limited to the hands, especially PIP and DIP, and 1st carpometacarpal and STT joints Gull...