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1760 Surgery

A 6-year-old boy is taken to a paediatrician because he has developed pain in his right hip. On physical examination, the doctor feels a large mass near the iliac crest. Plain X-ray films demonstrate a large lytic lesion of the ilium. MRI studies show that the tumor appears to arise in the bone, but extends into the adjacent soft tissues. A large incisional biopsy demonstrates a tumor composed of sheets of small, round, blue cells. Which of the following is the most likely diagnosis?

AChondrosarcoma
BEwing sarcoma
CGiant cell tumor of bone
DMalignant fibrous histiocytoma
Surgery
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1764 Surgery

A young couple has been unsuccessful in conceiving a child over a 4-month period. The 28-year-old wife had been extensively investigated by a female reproductive specialist, and no abnormalities were detected. The husband, who initially refused to undergo semen analysis now agreed to this investigation, which revealed a low volume and azotemia. Follicle-stimulating hormone (FSH) level is normal. What is the most likely diagnosis?

ABilateral testicular atrophy
BCongenital absence of the vas deferens
CHydrocele
DVaricocele
Surgery
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