Masson’s Tumour of Parotid: A Case Report and Literature Review

Masson’s Tumour of Parotid

Abstract

Masson’s tumour is a rare non-neoplastic vascular lesion characterized by a reactive proliferation of endothelial cells with papillary growth secondary to intravascular thrombosis or vascular stasis. It most commonly affects medium-sized veins and mainly involves the skin and subcutaneous tissues of the head and neck region, trunk, and extremities. Parotid gland involvement is extremely rare, with only four cases reported worldwide to date. The preoperative diagnosis is challenging, and the condition is usually misdiagnosed as another more common benign lesion. Histopathological examination and immunohistochemical studies are considered the gold standard for the diagnosis and exclusion of malignant lesions that may resemble Masson’s tumour. The extent of surgical resection, either superficial or total parotidectomy, depends on preoperative imaging and intraoperative findings. The prognosis is favourable with a low recurrence rate if the surgical margin is negative.