The<unk>  is an abnormal connection between the anorectal canal and the perianal skin that is lined with granulation tissue.<unk>  develops from infection of<unk>  crypts gland.<unk> s are classified depending upon the location of sphincter into 4 types-intersphincteric, transsphincteric, suprasphincteric, extrasphincteric.<unk>  are classified into two categories based on the risk factors associated- simple<unk>  and complex<unk> .<unk> s are also classified according to primary tracks into two- high and low<unk> s.<unk> s patient presents with rectal pain, discharge. On rectal examination, there is redness, tenderness and discharge are seen. The<unk>  is diagnosed clinically and endoanal ultrasonography and MRI helps in finding out the anatomy of<unk> . The mainstay of treatment is surgery but medical therapy for symptomatic relief of pain and fever. Antibiotics are used if there are sepsis and treatment of underlying cause is very important to prevent recurrence of<unk> . Various options for surgical management are <unk> tomy and Seton. Sphincter-saving methods are fibrin glue, endorectal advancement flap, LIFT procedure, BioLIFT, stem cells and defunctioning.
Anal fistula
Anal fissure
Anal abscess
Perianal abscess
Fecaloma
Anal cancer
Genital ulcer
Anal dysplasia