Gynecologic
Benign ovarian
	Corpus luteum cyst
	Follicular cyst
	Luteoma of pregnancy
	Mature teratoma
	Ovarian torsion
	Polycystic ovaries
	Serous and mucinous cystadenoma
	Theca-lutein cyst
Malignant ovarian
	Borderline tumors
	Epithelial carcinoma
	Ovarian germ cell tumor
	Ovarian sarcoma
	Sex-cord or stromal tumor
Benign nonovarian
	Ectopic pregnancy
	Endometrioma
	Hydrosalpinx
	Leiomyoma
	Tubo-ovarian abscess
Malignant nonovarian
	Endometrial carcinoma
	Fallopian tube carcinoma
Nongynecologic
Benign
	Appendiceal abscess
	Appendicitis
	Bladder diverticulum
	Diverticular abscess
	Nerve sheath tumor
	Pelvic kidney
	Peritoneal cyst
	Ureteral diverticulum
Malignant
	Gastrointestinal carcinoma
		Krukenberg tumor (signet cell adenocarcinoma arising from the gastrointestinal tract with metastasis to the ovary)
	Metastasis from breast, colon, etc.
	Retroperitoneal sarcomas