Aims: We report a case of pulmonary basaloid carcinoma with bronchiolo-alve
olar cell differentiation.
Patients and Results: A 75 year-old presented with a tumor measured 2.0 cm
and was located in the periphery of the left upper lobe, Histologically, th
e lesion consisted of nests of basaloid cells, and lumina and clefts lined
by tumor cells with features of mucous cells or type II pneumocytes or with
mixed features.
Conclusions: Previously reported basaloid carcinomas of the upper aero-dige
stive tract and lung have been purported to have an aggressive behavior. Th
e tumor in the present study had features of a histopathological low grade
tumor including a low mitotic rate, no tumor necrosis and a growth pattern
at the periphery similar to that of bronchiolo-alveolar carcinoma.