title: An elusive cause of perianal pain in a patient with Hirschsprung's disease.
abstract: A 23-year-old woman presented to the outpatients department with symptoms of acute onset perianal pain of 2 weeks' duration and constipation. She was a known case of Hirschsprung's disease and was operated on in infancy. Rectal examination ruled out acute fissure or perianal sepsis, and subsequent colonoscopy was normal. Because of persistent symptoms, she was evaluated further by imaging which revealed a presacral lesion closely abutting the nerve roots, suggesting the possibility of a nerve sheath tumour. The tumour was excised by the perineal route, and surprisingly the histopathology report revealed an epidermoid (sebaceous) cyst. Presacral tumours are very rare lesions which most colorectal surgeons never come across in their careers. Tumours range from indolent, to benign, to more aggressive malignant lesions. Usually the symptoms are non-specific and surgical excision remains the best treatment. Multidisciplinary team work is needed for most of these cases.
authors.affiliation: Madras Medical College, Institute of Surgical Gastroenterology, Chennai, Tamilnadu, India.
authors.forename: Thirumaraichelvan
authors.initials: T
authors.lastname: Perungo
authors.affiliation: Department of Surgical Gastroenterology, Madras Medical College, Chennai, Tamilnadu, India.
authors.forename: Johnrose
authors.initials: J
authors.lastname: John Grifson
authors.affiliation: Madras Medical College, Institute of Surgical Gastroenterology, Chennai, Tamilnadu, India.
authors.forename: Anbazhagan
authors.initials: A
authors.lastname: Amudhan
authors.affiliation: Madras Medical College, Institute of Surgical Gastroenterology, Chennai, Tamilnadu, India.
authors.forename: Kannan
authors.initials: K
authors.lastname: Devy Gounder
mesh_terms: D001004:Anus Diseases / Q000209:etiology* / Q000601:surgery; D059350:Chronic Pain / Q000209:etiology; D003113:Colonoscopy; D003937:Diagnosis, Differential; D004814:Epidermal Cyst / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D005260:Female; D006627:Hirschsprung Disease / Q000150:complications*; D006801:Humans; D018317:Nerve Sheath Neoplasms / Q000000981:diagnostic imaging; D017699:Pelvic Pain / Q000209:etiology* / Q000601:surgery; D055815:Young Adult