Intra-osseous glomus tumour: a case report.

A rare case of intra-osseous glomus tumour is described, together with a review of eight other reported cases. Electron microscopic studies suggest that glomus cells, the histogenesis of which has not been completely resolved, originate from smooth muscle. Studies in this case support that hypothesis: they showed the important role of contraction of the glomus cells in eliciting the peculiar type of pain.