1.  What is the diagnosis?  A.  SNUC B.   Inverting Papilloma C.   Fungal Sinusitis D.  Esthesioneuroblastoma 2. This cancer originates from? A.   The submucosal cells of the sinonasal tract B.  The middle turbinate C.   The olfactory cells D.  The osseous maxilla 3....

Neurofibromatosis type 2

1. What is the diagnosis? A. Von Hippel Lindau B. NF-1 C. NF-2 D. Tuberous Sclerosis 2. Unlike NF-1, NF-2 is NOT associated with? A. Schwannomas B. Meningiomas C. Ependymomas D. Neurofibromas 3. Which of the following is associated with NF-1? A. Bilateral Vestibular Schwannomas B....
subchondral erosions of the fourth left distal interphalangeal joint and right third and fourth proximal interphalangeal joints with periosteal reaction.

Psoriatic Arthritis

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 late phases, ankylosis of joints may occur –Another feature is sausage...
Erosive osteoarthritis.

Erosive Osteoarthritis

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 wing appearance –Central erosions, unlike other processes which are marginal ...
Salt and pepper skull.

Hyperparathyroidism/Renal Osteodystrophy

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 osteosclerosis –Vascular Ca+: usually w/secondary hyperparathyroidism from renal failure –Salt and pepper...


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 severe resorption of 1st carpometacarpal joint with radial subluxation of...
Blade-of-grass sign. 

Paget Disease

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

Posterior Hip Dislocation

Usually, result of MVA 90% posterior, +/- posterior wall or column acetabular fx The mechanism is the posterior force on a flexed hip Complications: sciatic nerve injury (10%), AVN of the femoral head,...
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

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: separation of humerus from glenoid such that normal overlap is...

Developmental Delay

What is the diagnosis ? A. Looks normal to me B. Polymicrogyria C. Hydranencephaly D. ...

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