Causes of Pelvic Mass - Differential Diagnosis Algorithm

Gastrointestinal:

 • Appendiceal abscess

 • Diverticular abscess

 • Diverticulosis

 • Rectal/Colon cancer

Genitourinary:

 • Distended bladder

 • Bladder cancer

 • Pelvic kidney

 • Peritoneal Cyst

Uterus:

 • Fibroid

 • Adenomyosis

 • Neoplasm

 • Pyometra

 • Hematometra

Fallopian Tube:

 • Tubo-ovarian abscess

 • Paratubal cyst

 • Neoplasm

 • Pyosalpinx

 • Hydrosalpinx

Ovary:

 • See Ovarian Mass scheme

Uterus:

 • Intrauterine pregnancy

Fallopian Tube:

 • Tubal ectopic pregnancy

Ovary:

 • Ovarian ectopic pregnancy



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