Pulmonary Adenofibroma; A Rare Finding

Pulmonary adenofibroma is a rare lung benign tumor resembling adenofibroma of the breast and genital tract. Few cases have been reported with this entity. We report a case of pulmonary adenofibroma in a 65-year-old female, which was found incidentally through the work up for her gastrointestinal problems. Chest radiograph and computed tomography scan disclosed a well circumscribed pulmonary mass at left lower lung lobe. Surgical excision was done and the specimen studied macroscopically and microscopically. Histological findings revealed a biphasic lesion showing a leaflike fibroepithelial pattern with stromal and epithelial components. Immunohistochemical studies showed positivity for pan cytokeratin (CK), CD34, vimentin, smooth muscle actin (SMA), but negative for S100 and calretinin. The patient had neither symptoms nor recurrence through one and half year follows up.