Skin, Pilonidal sinus [LMP25452]

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Diagnostic Modality: 
Whole Slide Image
Disease Category: 
Cellular Responses to Stress and Toxic Insults: Adaptation, Injury, and Death
Diagnosis: 
Pilonidal sinus
Species: 
Human
Organ System: 
Skin
Gender: 
Male
Age: 
20 years
Diagnosis Code: 
ICD-10: L05
Slide Contributor Information
Duan, K., Latta, E.

Clinical History

Skin lesion from lower back.

Clinical Discussion

Pilonidal sinus is a chronic inflammatory lesion of the skin caused by keratin plugs and debris. This condition is usually found near gluteal folds. Histologically, it is characterized by a cyst or pseudocyst into the deep dermis, and may be lined by squamous epithelium with chronic inflammation.

See related content for references:

1) Søndenaa, K., et al., APMIS. 1995 Apr;103(4):267-72.

Related Content

Related External Links: 
Søndenaa K., Pollard ML. Histology of chronic pilonidal sinus. APMIS. 1995 Apr;103(4):267-72.