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98 Orthopaedics

A 12 year old girl complains of pain persisting in his leg for several weeks with a low grade fever. A radiograph reveals a mass in the diaphyseal region of the left femur with overlying cortical erosion and soft tissue extension. A biopsy of the lesion shows numerous small round cells, rich in PAS positive diastase sensitive granules. The most likely histological diagnosis is :

AOsteogenic sarcoma.
BOsteoblastoma.
CEwing's sarcoma.
DChondroblastoma
Orthopaedics
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99 Orthopaedics

A woman of 45, a known cause of pemphigus vulgaris on a regular treatment with controlled primary disease presented with pain in the right hip and knee. Examination revealed no limb length discrepancy but the patient has tenderness in the scarpa’s triangle and limitation of abduction and internal rotation of the right hip joints as compared to the other side. The most probable diagnosis is –

AStress fracture of neck of femur
BAvascular necrosis of femoral head
CPerthe's disease
DTransient synovitis of hip
Orthopaedics
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