High Dose Multiple Site Injection of Botox Versus Lateral Sphincterotomy in Chronic Analfissure

Inclusion Criteria: * patients suffering chronic anal fissure aged above 16 years old Exclusion Criteria: * those with previous anal surgery, * complicated anal fissure, * unfit for surgery, * specific disease as Crohn's disease and ulcerative colitis, * malignancy, * anal fistula or abscess * those with systemic disease requiring treatment with calcium channel blockers and /or nitrates