Fallopian tubes & broad ligament

Broad ligament

Paratubal cysts


Editorial Board Member: Gulisa Turashvili, M.D., Ph.D.
Deputy Editor-in-Chief: Jennifer A. Bennett, M.D.
Stephanie L. Skala, M.D.

Topic Completed: 20 September 2021

Minor changes: 21 October 2021

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PubMed Search: Paratubal cysts fallopian tubes

Stephanie L. Skala, M.D.
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Cite this page: Skala SL. Paratubal cysts. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/fallopiantubesparatubalcyst.html. Accessed October 25th, 2021.
Definition / general
  • Fluid filled cyst with ciliated lining adjacent to fallopian tube
Essential features
  • Ciliated cyst adjacent to fallopian tube
  • Typically asymptomatic
  • Almost always benign, with rare reports of borderline tumor
Terminology
  • Paraovarian cyst
  • Hydatid cyst
  • Not recommended: hydatid of Morgagni
ICD coding
  • ICD-10: N83.8 - other noninflammatory disorders of ovary, fallopian tube and broad ligament
Epidemiology
  • Common benign incidental finding (~7 - 10% of women) (J Pediatr Surg 2011;46:2161)
  • All age groups, most commonly third to fifth decade
Sites
  • Paratubal (between fallopian tube and ovary)
Pathophysiology
  • Unknown
Etiology
  • Believed to originate from mesothelium or be remnant of Müllerian duct or Wolffian duct
Clinical features
Diagnosis
  • Typically noted incidentally on intraoperative or gross examination
Radiology description
Prognostic factors
Case reports
Treatment
  • Surgical excision of the paratubal cyst represents definitive treatment for symptomatic patients (J Clin Endocrinol Metab 2000;85:1021)
  • Benign follow up is expected; treatment is not required for asymptomatic patients
Gross description
  • Simple fluid filled cyst(s) near fallopian tube
Gross images

Images hosted on other servers:
Benign appearing cyst

Benign appearing cyst

Microscopic (histologic) description
  • Simple fluid filled cyst lined by ciliated tubal type epithelium
  • Focal papillary projections may be seen
Microscopic (histologic) images

Contributed by Stephanie L. Skala, M.D.
Simple cyst near tube

Simple cyst near tube

Virtual slides

Images hosted on other servers:
Benign fallopian tube with simple paratubal cysts

Benign fallopian tube with simple paratubal cysts

Sample pathology report
  • Fallopian tubes, bilateral salpingectomy:
    • Benign fallopian tubes with paratubal cysts
Differential diagnosis
  • Endometriotic cyst:
    • Associated with endometrial type stroma with or without hemosiderin laden macrophages
  • Serous cystadenoma:
    • Histologically identical to paratubal cyst but > 1 cm in size
  • Hydrosalpinx:
    • Dilation of the fallopian tube lumen with attenuation of the tubal epithelium with or without diminished plicae
    • Distinction based largely on location of the cystic space within rather than near the fallopian tube
Board review style question #1

Upon review of a salpingectomy specimen, the lesion shown above is identified next to the fallopian tube. What is the expected outcome?

  1. Benign follow up
  2. Local recurrence
  3. Metastatic disease
  4. Progression to carcinoma
Board review style answer #1
A. Benign follow up

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Reference: Paratubal cysts
Board review style question #2
Which of the following is true about paratubal cysts?

  1. Large paratubal cysts may cause torsion
  2. Large paratubal cysts often progress to borderline tumors
  3. Paratubal cysts are frequently diagnosed on MRI
  4. Paratubal cysts are an unusual finding
Board review style answer #2
A. Large paratubal cysts may cause torsion

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Reference: Paratubal cysts
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