[Primary anal tuberculous fissure]. / Fisura anal tuberculosa primaria.

The anal tuberculous (TBC) fissure is infrequent. For this reason diagnosis is difficult. A case of a female adult patient with anal TBC fissure that consults for bleeding and perianal pain is presented. The perianal tuberculosis is a rare manifestation of the general disease. A routine biopsy must be performed, with the corresponding histopathologic study. A specific origin should be suspected when an anal chronic fissure, painful and bleeding, without response to the habitual treatment, is found. The primary TBC fissure can be cured with the administration of three drugs during 3 to 4 months.