Pseudomyxoma peritonei associated with a mucinous ovarian tumor arising from a mature cystic teratoma. A case report

It has generally been accepted that pseudomyxoma peritonei/disseminated peritoneal adenomucinosis originates from appendiceal low-grade adenomatous mucinous tumors. A woman who underwent an appendectomy 42 years ago, presented with a unilateral ovarian tumor whose immunohistochemical phenotype and its association with a teratoma, strongly suggest that pseudomyxoma peritonei originated from a ruptured mucinous tumour arising from a mature cystic teratoma