Perianal abscess

Infective-inflammatory collection within the perianal region - often associated with perianal fistulae 

Infection and anal gland drainage obstruction from the perianal fistula may lead to an acute perianal abscess

a/w

• Diabetes
• Crohn's disease
• Pelvic infection
• Trauma
• Cancer ± radiation

May resolve spontaneously or require surgical drainage