Acute calculous cholecystitis in patient with osteopetrosis

The gallbladder is distended showing large radiodense stone witin its neck, asscioated with diffuse mural thickneing and enhnacment. Mild pericholecystic fluid and fat plane smudging is also noted. This is impressive of "acute calculous cholecystitis"

Hepatosplenomegaly.

Widespread bone thickening and dense osteosclerosis showing the classical bone within a bone. Bilateral pathological fractures of the ribs, both femoral necks, right femoral mid-shaftshaft, L4 and L5 pars interarticularis.

Erlenmeyer flask type deformity of both femora.

The patient was known"autosomal dominant osteopetrosis" which explains patient's survival to the adulthood. Autosomal dominant osteopetrosis is the less severe type of osteopetrosis.

Here in this case, there are typical features of osteopetrosis, such as:

• Diffuse thickening and sclerosis of the examined bones with the typical "bone within a bone" appearance and "sandwich vertebrae".
• Pathological fractures of femoral necksthe ribs, both femora, L4 & L5 pars.
• Hepatosplenomegaly secondary to extra-medullary hematopiosis.