1. Sawabe M, Takubo K, Esaki Y, Hatano N, Noro T, Nokubi M. Spontaneous uterine perforation as a serious complication of pyometra in elderly females. Aust N Z J Obstet Gynaecol. 1995; 35:87–91.
2. Chan LY, Yu VS, Ho LC, Lok YH, Hui SK. Spontaneous uterine perforation of pyometra. A report of three cases. J Reprod Med. 2000; 45:857–860.
3. Inui A, Nitta A, Yamamoto A, Kang SM, Kanehara I, Tanaka H, et al. Generalized peritonitis with pneumoperitoneum caused by the spontaneous perforation of pyometra without malignancy: report of a case. Surg Today. 1999; 29:935–938.
4. Saha PK, Gupta P, Mehra R, Goel P, Huria A. Spontaneous perforation of pyometra presented as an acute abdomen: a case report. Medscape J Med. 2008; 10:15.
5. Yildizhan B, Uyar E, Sişmanoğlu A, Güllüoğlu G, Kavak ZN. Spontaneous perforation of pyometra. Infect Dis Obstet Gynecol. 2006; 2006:26786.