Hamartoma simulating ipsilateral metastasis in a case of primary bronchogenic carcinoma.

I Although primary carcinoma of the lung is fairly common, representing about 10 per cent of all carcinoma cases seen a t autopsy,l the co-existence of a benign pulmonary hamartoma must be rare. Fortunately, in the case to be presented, the two lesions were in the same lung so tha t pneumonectomy removed both tumors. Had the benign lesion been in the contra-lateral lung, it would have been considered to be a metastasis from the bronchogenic carcinoma and the patient would have been denied the benefit of surgery.