Spigelian hernia.

Six cases of spigelian hernia are reported, including three unusual ones: (1) the presence of an acutely inflamed appendix in the hernial sac; (2) a patient with multiple associated hernias; and (3) a woman with a strangulated spigelian hernia occurring with endometrial carcinoma. The anatomy, etiology, clinical features and management of these hernias are discussed.