A case of oat-cell carcinoma arising in the pericardium of a 51-year-o
ld woman is described. The patient had multiple nodes; the largest was
2 X 1 cm. Two years later the patient presented with a tumor on her l
ower gum; this measured 2 mm and had similar characteristics to the pr
evious one. The immunohistochemical study showed strong positivity for
neuron-specific enolase. From review of the literature, it may be con
cluded that this is the first report of oat-cell carcinoma occurring i
n the pericardium.