There is a familial variant of glomus tumor, linked to chromosome 1p21–22, encoding the glomulin gene (GLMN). Multiple glomus tumors are inherited as an autosomal dominant trait and are usually found on the legs. They are often present in younger children. Neurofibromatosis type 1 may present with numerous glomus tumors involving the digits. They are often painless.
D18.00 – Hemangioma unspecified site
403969002 – Glomus tumor
Differential Diagnosis & Pitfalls
- Blue rubber bleb nevus syndrome
- Dercum disease
- Granular cell tumor
- Subungual hematoma
- Squamous cell carcinoma
- Lobular capillary hemangioma (pyogenic granuloma)
- Acute paronychia
- Osteoid osteoma
- Foreign body
- Painful onycholysis may occur secondary to a subungual vesicle or bulla, as may be seen in porphyria, pseudoporphyria, or other autoimmune blistering diseases.