Presternal bronchogenic sinus with predunculated lymphoid aggregate.

Congenital cranial, cervical, and upper thoracic sinuses are rare conditions that historically have been classified according to their location and/or pathology. However, published reports of bronchogenic or branchial anomalies are on the increase, and the traditional defining characteristics--location and histopathology--are proving to be less reliable. We describe the pathologic and clinical findings of a congenital presternal pedunculated lesion with a sinus, and review the literature to describe its proper classification.