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RACS ASC 2024

Malignant Glomus Tumour of the Scalp: a unique location for a rare tumour.

Poster

Presentation Description

Institution: Gold Coast University Hospital - QLD, Australia

The Malignant Glomus tumour are of mesenchymal origin and are a rare variation of its already rare benign counterpart which only accounts for approximately 1% of soft tissue tumours. They usually occur within the dermis or subcutis of the upper or lower extremities, with the most common location being the subungual region of the fingers. The glomus is a physiological arteriovenous anastomosis that serves as a thermoregulator and is commonly present in the extremities. We present the case of a 94 year old male with a primary malignant glomus tumour of the scalp, proven on initial biopsy showing a mesenchymal tumour with myoid differentiation. His lesion was present for approximately six months prior to his review in the outpatient department, it underwent biopsy with his GP, and subsequent mapping biopsies within the Princess Alexandra hospital before having an US FNA of a enlarged node on a CT PET which revealed metastatic melanoma. He underwent a wide local excision and bone burring + level I-III neck dissection and reconstruction with a scalp transposition flap. The formal histology of the excision revealed nil further malignancy and his neck showed 1/16 lymph nodes with metastatic melanoma. Whilst rare this represents one of the few cases reported outside of the tumours typical locations and as such remains and important consideration for evaluation of soft tissue malignancies.

Speakers

Authors

Authors

Dr Lachlan Stephens - , Dr Andrew Lewandowski - , Dr Jonathan Wiper -