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14916 Pathology

An epidemiologic study observes increased numbers of respiratory tract infections among children living in a community in which most families are at the poverty level. The infectious agents include Streptococcus pneumoniae, Haemophilus influenzae, and Klebsiella pneumoniae. Most of the children have had pneumonitis and rubeola infection. The study documents increased rates of keratomalacia, urinary tract calculi, and generalized papular dermatosis in these children as they reach adulthood. These children are most likely to have a deficiency of which of the following vitamins?

AVitamin A
BVitamin B1
CVitamin E
DVitamin D
Pathology
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14921 Pathology

A 25 year old man undergoes orchiectomy for a testicular tumor. Microscopically, the tumor shows a variety of patterns, including lobules containing large cells with watery cytoplasm, structures resembling primitive glomeruli, syncytiotrophoblast, and shafts of undifferentiated cells with focal glandular differentiation. Which of the following terms most accurately describes this tumor?

AChoriocarcinoma
BEmbryonal carcinoma
CMixed tumor
DSeminoma
Pathology
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