Fallopian tubes
Benign or nonneoplastic conditions
Paratubal cysts

Author: Nicole Riddle, M.D. (see Authors page)
Editor: Jamie Shutter, M.D.

Revised: 11 August 2017, last major update July 2013

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed Search: Fallopian tubes paratubal cysts

Cite this page: Paratubal cysts. PathologyOutlines.com website. http://pathologyoutlines.com/topic/fallopiantubesparatubalcyst.html. Accessed August 22nd, 2017.
Definition / general
  • Epithelium lined fluid filled cyst adjacent to fallopian tube
Terminology
  • Sometime referred to as paraovarian cyst
  • Generally, terminology depends on location of cyst
  • Hydatid cyst of Morgagni:
    • Variant of peritubal cyst
    • Commonly pedunculated, often tiny, frequently multiple, cyst connected to fimbriae
    • Though typically asymptomatic, is twice as common in women with unexplained infertility and may play a role in infertility (possibly due to interference with tubal pick up and function)
Epidemiology
  • Common incidental and benign finding (~4% of women, ~10% of adnexal masses)
  • All age groups, most commonly third to fifth decade
Etiology
  • Believed to originate from mesothelium or be remnant of Müllerian duct and Wolffian duct
Clinical features
  • Most cysts are small and asymptomatic ( < 1 to 8 cm in diameter, rarely 20+ cm)
  • May be found at surgery or incidentally on radiological study performed for another reason
  • Larger lesions may become symptomatic causing pressure or pain
  • May lead to torsion of adnexa resulting in acute pain
Radiology description
  • May be seen on ultrasound but also CT / MRI of pelvis / abdomen
Case reports
Gross description
  • Variably sized, typically thin walled "cavity" in peritubal tissue
  • May be attached to fimbriated end of tube by a pedicle
  • Almost always has clear serous type fluid
Gross images

Images hosted on other servers:

Benign appearing cyst

Microscopic (histologic) description
  • Usually lined by simple cuboidal epithelium
  • May have fallopian tubal epithelium or focal papillary projections
Microscopic (histologic) images

Images hosted on other servers:

Low power view of
cyst (lower) separate
from fallopian tube (upper)

Differential diagnosis