Benign fibrous histiocytoma presenting as anal canal polyp: first case report

AbdullGaffar, Badr; Abdulrahim, Manal; Ghazi, E. El

doi:10.1016/j.anndiagpath.2012.07.008

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…However, there have been reported cases of aneurysmal BFH occurring in the head and neck, trunk and lower limbs [4][5][6][7]. Furthermore, we found one clinical report [8] of a common polypoid BFH presenting in the anal canal, not an aneurysmal BFH. Aneurysmal BFH most often presents as a painless mass within the dermis and subcutaneous tissue [9].…”

Section: Discussionmentioning

confidence: 65%

Aneurysmal benign fibrous histiocytoma of the anal canal: a rare differential diagnosis

Amarnani

Harikrishnan

2019

Int J Colorectal Dis

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Background To our knowledge, we report the first case of an aneurysmal benign fibrous histiocytoma occurring in the anal canal. Methods Clinical, histological, radiological and surgical data pertaining to this patient were analysed. Additionally, a literature review on aneurysmal benign fibrous histiocytoma was conducted. Results We describe a 48-year-old Caucasian male presenting with a 2-week history of a painful anus, fresh rectal bleeding and tenesmus. Digital rectal examination identified a tender firm mass in the anal verge. Magnetic resonance imaging revealed high signal in the anal canal. Flexible sigmoidoscopy revealed an ulcerated 3-cm indurated lesion at the four o'clock position. Biopsies taken of the mass confirmed the diagnosis of an aneurysmal benign fibrous histiocytoma (BFH). Following a discussion in the colorectal multidisciplinary team, the patient was counselled for an excision of the lesion. Diathermy dissection was performed to completely excise the tumour with a margin involving the fibres of the anal sphincter. The patient made a full recovery and had no residual symptoms. Histology of the excised specimen confirmed clear margins of the BFH. Conclusions This paper aims to highlight a rare differential diagnosis for an anal mass. An aneurysmal BFH most often presents as a painless mass within the dermis and subcutaneous tissue. As such, this case presents a diagnostic challenge to both colorectal surgeon and histopathologist due to its low incidence and unusual location. We further present the clinical and radiographic evidence to confirm the diagnosis. Additionally, we discuss the literature pertaining to this condition and its optimal management.

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