cystic adnexal masses

ovarian cyst
- mature follicle measures up to 2.5 cm at ovulation
- corpus luteum cyst common in first 16 weeks of pregnancy
- polycystic (Stein-Leventhal) disease
paraovarian cyst
- Wolffian duct remnants in broad ligament
ovarian neoplasm
- serous cystadenoma (most common benign ovarian tumor)
- mucinous cystadenoma (usually complex)
- cystic teratoma (usually complex)
endometriosis
- diffuse (not detectable by US)
- localized (generally anechoic or hypoechoic)
ectopic pregnancy
pelvic inflammatory disease
- gonorrhea or chlamydia
- localized abscess and hydrosalpinx
non-gynecologic mass
- mesenteric cyst
- ureterocele
- bladder diverticula
- lymphocele

Richard Gunderman, MD - 14 February 1995
Last updated: 1 October 2013