What is Glomus Tumour? Glomus tumour is an uncommon true benign tumour arising from contractile glomus cells that are present in the arteriovenous shunts (sucquet-hoyer anastomosis). These tumours are found most often in the dermis of the fingers or toes under a nail; other sites are mucosa of the stomach and nasal cavity. These lesions are characterised by extreme pain….