[An unexpected aetiology of massive haemoperitoneum during pregnancy].

We report the case of a 28-year-old woman who was diagnosed with massive hémoperitoneum while being 28 weeks pregnant. This para one woman had no previous history of endometriosis. During emergency caesarean section, she was diagnosed with superficial uterine rupture due to the spontaneous tearing of a sigmoid colon endometriotic lesion that was adherent to the posterior wall of the uterus. Endometriotic lesion is an exceptional aetiology of spontaneous hemoperitoneum during pregnancy and is usually due to the rupture of uterine vessel. To our knowledge, spontaneous rupture of a colon lesion adherent to the posterior surface of the uterus has not yet been reported.