High risk of delayed or missed diagnosis of mucinous appendiceal neoplasm by transvaginal ultrasound: A case series

Appendiceal Neoplasm is a rare tumour with a vague and nonspecific clinical presentation. Delayed or missed diagnosis could result in mucin spill into the peritoneal cavity because of cancer infiltration or spontaneous rupture of appendix. This condition is called Psuedomyxoma Peritonei (PMP) and has a very poor prognosis if not treated properly. We present 4 cases of Appendiceal Neoplasm misdiagnosed as adnexal masses of different origin: Dermoid cyst of the right ovary; stump of the previously removed tube; ectopic pregnancy; ovarian malignancy. It is important for gynaecologists to recognize mucinous appendiceal neoplasm in the differential diagnosis of right adnexal masses in order to reduce the risk of misdiagnosis. Keywords: Appendiceal Neoplasm, Adnexal Masses, Transvaginal Ultrasound, Misdiagnosis.