View source for Pilonidal cyst

==Background==
*Sinus is formed by penetration of skin by ingrowing hair
**Leads to foreign body granuloma reaction, sinus perpetuated by repeated bouts of infection 
*Carcinoma is rare complication of chronic, recurring pilonidal sinus disease

==Clinical Features==
[[File:Pilonidal abscess.jpg|thumb|Pilonidal abscess of buttox.]]
*May present as a painless cyst, acute [[abscess]], or recurring cysts with draining sinuses
*Occurs in midline in the upper part of the natal cleft
**Does not communicate with the anorectum
**Because of proximity to anus can be confused for a perianal abscess

==Differential Diagnosis==
{{Anorectal DDX}}

==Evaluation==
*Clinical

==Management==
*[[I&D]] - longitudinal incision lateral to sacral midline
*[[Antibiotics]] only needed if [[cellulitis]] is present
*Refer to surgeon for recurrent disease
**40% recurrence rate
**Refer for follicle removal after acute inflammation subsides (~1 wk)<ref>Rosen's 7th Ed</ref>

==See Also==
*[[Anorectal Disorders]]

==References==
<references/>
[[Category:GI]]
[[Category:Dermatology]]