Aggressive angiomyxoma of ischioanal fossa misdiagnosed as perianal abscess-rare case report and literature review

Abstract

Aims and Objectives: To report a rare case of ischioanal mass presented clinically as perianal abscess. Method: 42 years old man presented to outpatient with pain over right perianal region. Based on local examination finding it was misdiagnosed as perianal abscess and hence incision put, but no pus noted. Next day a large mass protruded out through the incision site. Patient was referred to tertiary care. On evaluation the mass was extending into right ishchioanal fossa abutting anal spinchter. Results: Mass was excised intoto through perianal approach without damaging external spinchter. Post-operative events were uneventfull. Passed feces on third post-operative day. Biopsy report showed as Aggressive Angiomyxoma. Conclusion: Aggressive angiomyxoma is a rare case presents with large mass in pelvic region diagnosed by histopathological examination can be excised through perianal approach if localised to ischioanal fossa even though it abuts anal spinchter. Therefore anal spinchter activity can be preserved.