To investigate the underrecognized effects of isotretinoin as a cause of anal fissures (AF) and compare AF patients undergoing systemic isotretinoin treatment (SIT) and those not receiving this treatment. This study was conducted with 118 patients with newly diagnosed AF, 54 undergoing SIT (Group 1) and 64 not undergoing SIT (Group 2). The same clinical treatment modalities including first-line conservative and medical treatments during the first eight weeks, followed by interventional methods (botulinum injection or sphincterotomy) for unresponsive/recurrent cases were used for all patients. A comparative analysis was also performed. Age and body mass index (BMI) were statistically low in group 1 (p=0.003; p=0.032). Similarly, the VAS pain and Wexner constipation scores and the duration of symptoms were lower in group 1 than Group 2 (p=0.003, p
Key words: Anal fissure, isotretinoin, acne vulgaris, retinoids, surgical treatment
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