Table 1.

Differential diagnoses of a lesion in the right lower abdominal quadrant suspected of being a mucocele of the appendix.

Differential diagnosis
Neoplastic
Right cystic ovarian tumour (mucinous cystadenoma, mucinous borderline tumour, mucinous carcinoma, serous cystadenoma, serous borderline tumour, serous carcinoma, and cystadenofibroma)
Right paraovarian serous cystadenoma
Non-neoplastic
Acute/subacute appendicitis*
Peri-appendiceal abscess
Right tubo-ovarian abscess
Right hydrosalpinx
Peritoneal inclusion cyst
Lymphocele
Enteric duplication cyst

^*Appendicitis and mucocele of the appendix may coexist