Epidemiology
Rare
Pathology
Hypertrophied glomus
- coiled AV structure involved in temperature regulation
- > 50% in subungual region
- hand is the most common site
- usually under the nail plate
Symptoms
Triad
- pain
- exquisite tenderness
- cold intolerance
Examination
Ridging of nail bed
Blue spot at base of nail
X-ray
Well defined radiolucent eccentric lesion
- base of P3
- < 1cm
MRI
Dark on T1 / Bright on T2
Treatment
Remove nail plate
Longitudinal incision in nail bed
Excise tumour and repair nail bed
Replace nail