Surgical Excision of Orbital Progressive Granular Cell Tumou
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Granular cell tumor (GCT) is mostly benign lesion first described by Abrikossoff and named after him. Most cases are reported in the head and neck area, where the tongue is the most common site. This article reviews previous cases in the literature for GCT in the orbit and presents a new case.

A 49-year-old male presented with apparent exophthalmos. Examination of the patient revealed the presence of a mass in the bottom side of the orbit. A substantial progress was noted after two months from the initial examination using computed tomography (CT) scan. An orbital mass was extracted and histological analysis showed signs typical for GCT. Immunohistochemistry was positive for S-100; the biopsy showed no mitotic or necrotic areas. Proptosis was resolved after surgery and a six-year follow-up CT scan was performed. It is hence concluded that rapid progress of a tumour does not necessarily suggest malignancy.

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