Basaloid carcinoma of the lung with bronchiolo-alveolar cell differentiation. A case report

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.