Nihon Ika Daigaku zasshi
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A spigelian hernia is an uncommon hernia of the anterior abdominal wall. We herein report a case of spigelian hernia, pre-operatively diagnosed as an incisional hernia. A 61-year-old woman had undergone an abdominal hysterectomy 14 years prior to her admission to our hospital complaining of a left lower abdominal mass with recurring pain. ⋯ The hernial sac was dissected and the defect of the abdominal wall was closed. The diagnosis of a spigelian hernia can be difficult because of its nonspecific clinical findings and insidious nature. Diagnostic procedures and differential diagnosis are herein discussed with a review of the literature.