Home   Chapter Home   Jobs   Conferences   Fellowships   Books


Anus and perianal area

Benign or non-neoplastic lesions

Tailgut cyst

Reviewer: Nat Pernick, M.D. (see Reviewers page)
Revised: 15 April 2013, last major update April 2005
Copyright: (c) 2003-2013, PathologyOutlines.com, Inc.


● Rare congenital presacral lesion
● Also called retrorectal cyst hamartoma
● May arise from remnants of postanal gut (tailgut)
● Usually occurs in retrorectal (presacral) space of all ages, more common in females, associated with pain/discomfort
● May become infected, be associated with recurrent perianal fistulas
● Rarely associated with malignancy

Case reports

● 41 year old woman with carcinoid tumor arising in a tailgut cyst of anorectal junction with distant metastasis (Arch Pathol Lab Med 2004;128:578)


● Complete excision with free margin of normal tissue, generous sampling

Micro images

Cyst with carcinoid tumor

Differential diagnosis

● Anal gland cyst
● Anterior sacral meningocele
Dermoid cyst
● Duplication (enterogenous) cyst

End of Anus and perianal area > Benign or non-neoplastic lesions > Tailgut cyst

This information is intended for physicians and related personnel, who understand that medical information is often imperfect, and must be interpreted in the context of a patient's clinical data using reasonable medical judgment. This website should not be used as a substitute for the advice of a licensed physician.

All information on this website is protected by copyright of PathologyOutlines.com, Inc. Information from third parties may also be protected by copyright. Please contact us at copyrightPathOut@gmail.com with any questions (click here for other contact information).