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Bladder

Benign tumors

Urachal lesions - benign

Reviewer: Monika Roychowdhury, M.D., University of Minnesota Medical Center (see Reviewers page)
Revised: 3 July 2011, last major update May 2011
Copyright: (c) 2003-2011, PathologyOutlines.com, Inc.

Definition
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● Benign lesions originating from urachus; most common is urachal cyst (Yonsei Med J 2006;47:782)
● See also patent urachus

Etiology
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● Persistent urachal remnants is common; clinically important when infected, dilated or neoplastic

Case reports
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● 32 year old man with infected urachal cyst (Cases J 2009 Jun 25;2:6422)
● 40 year old woman with urachal endometrioma (J Med Case Reports 2009 Dec 1;3:9310)
● 45 year old woman with hamartoma of the urachal remnant (Arch Pathol Lab Med 1989;113:1393)
● 58 year old man with urachal cyst containing stones (Yonsei Med J 2008;49:869)
● 68 year old man with urachal-sigmoid fistula due to diverticular disease (Can Urol Assoc J 2007;1:52)

Treatment
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● Complete surgical excision to prevent malignant transformation

Clinical images
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Urachal cysts and fistulas

   
Urachal cysts - sinus tract between bladder dome and umbilicus


Infected urachal cyst

Gross images
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Infected urachal cyst and fibrous tract


Urachal cyst containing stones


Urachal sigmoid fistula

Other: inflamed urachal cyst

Micro description
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● Urachal cysts are lined by urothelium, cuboidal, flat or atrophic cells

Micro images
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AFIP Fig 2-79: Urachal cyst

End of Bladder > Benign tumors > Urachal lesions - benign

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