DIFFERENTIAL DIAGNOSIS OF ANAL FISTULA

Differential diagnosis of anal fistula are : 
-anal fissures
-constipation 
-cryptitis
-thrombosed hemorrhoids
-diseased anal gland 
-ulcerative colitis 
-Crohn's disease
-local radiation therapy 
-ulcerative colitis 
-tuberculosis 
-syphilis 
-HIV
-actinomycosis 
-gonorrhea 
-lymphogranuloma venereum 
-anorectal carcinoma