A small, bluish swelling in the skin, usually on a finger or toe near or under the nail, which is tender to touch and more painful if the limb is hot or cold.
The cause is overgrowth of the nerve structures that normally control blood flow and temperature in the skin.
The tumours are harmless but are surgically removed.... glomus tumour
a collection of *paraganglion cells in close relation to the internal jugular vein at its origin at the base of the skull. It is a site of origin for *glomus tumours (see also paraganglioma).... glomus jugulare
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