Unusual method of diagnosis in a case of benign duodenocolic fistula.

thorax possibly because of two large cysts getting infected. The anomaly is often present in men on the left side (Claman & Ehrenheft, 1960; Rubin et al., 1966) as in this patient. The aberrant vessel supplied only the sequestrated mass. Pryce (1946) reported that this vessel may supply only the sequestrated segment, the normally connected lung or this segment along with adjoining area of normal lung. The possible existence of an anomalous vessel must be kept in mind while operating on cystic lung, otherwise the division of a supposed stout adhesion may cause fatal haemorrhage (Douglas, 1948). The aetiology of this condition is one upon which few investigators agree. The various theories of origin are summarized by Boyd (1953) and Boyden (1958).