Spontaneous Regression of Endobronchial Carcinoid Tumor.

Spontaneous regression (SR) of cancer refers to partial or complete disappearance of a malignant tumor in the absence of treatment or in the presence of therapy, which is considered inadequate to exert a significant influence on the growth of neoplastic disease. SR is a very rare phenomenon in primary lung cancers. Follow-up of these patients is generally either by imaging or bronchoscopy. We present a patient with SR of an endobronchial carcinoid, followed by serial bronchoscopies and biopsy over a 24-month period.