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Bladder
Benign tumors
Urachal lesions - benign
Author: Nat Pernick, M.D. (see Authors page)
Revised: 28 February 2010, last major update February 2010
Copyright: (c) 2002-2010, PathologyOutlines.com, Inc.
Definition
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● Benign lesion originating from urachus; most common is urachal cyst (Yonsei Med J 2006;47:782)
● See also patent urachus
Terminology
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Epidemiology
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Sites
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Etiology
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● Persistent urachal remnants is common; clinically important when infected, dilated or neoplastic
Clinical features
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Prognostic factors
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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 (Archives 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 risk of malignant transformation
Clinical images
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Urachal cysts and fistulas
Urachal cyst #1 #2-sinus tract between Infected urachal cyst
bladder dome and umbilicus
Gross description (Macroscopy)
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Gross images
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Infected urachal cyst Urachal cyst Urachal sigmoid
and fibrous tract containing stones fistula
Other: inflamed urachal cyst
Micro description (Histopathology)
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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
Cytology description
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Cytology images
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Positive stains
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Negative stains
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Electron microscopy descriptions
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Electron microscopy images
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Molecular / cytogenetics description
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Molecular / cytogenetics images
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Differential Diagnosis
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● (link to topic)
Additional references
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End of Bladder > Benign tumors > Urachal lesions - benign
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