These are more likely to be callosities developing from repetitive pressure or friction, for example, occupational, sporting, finger sucking/chewing, or bulimia nervosa. [dermnetnz.org]

Affiliated tissues include skin, and related phenotypes are sensorineural hearing impairment and subcutaneous nodule Disease Ontology : 12 An autosomal dominant disease that is characterized by leukonychia, wart-like skin growths, palmoplantar keratoderma [malacards.org]

A deletion involving the connexin 30 gene in nonsyndromic hearing impairment. N Engl J Med 2002 ; 346 : 243 –9. Lerer I, Sagi M, Ben-Neriah Z, Wang T, Levi H, Abeliovich D. [jmg.bmj.com]

Differential Diagnosis (Other conditions with similar appearance) Abscess Blister Soft tissue tumor Psoriasis Verrucae/Wart Diagnosis Key Points *Diagnosis based on skin appearance *In rare cases, testing may be required to rule out other conditions Calluses [ozarkderm.com]

[…] pustulosis Generalized pustular psoriasis of Zumbusch Lingua geographica Psoriatiform keratosis Infantile acropustulosis Darier's disease Porokeratosis Acrokeratoelastoidosis Pityriasis rubra pilaris Glucagonoma syndrome Acrodermatitis enteropathica Blistering [atlases.muni.cz]

The differential diagnosis includes Bouchard and Heberden’s nodes of osteoarthritis, rheumatoid nodules, gouty tophi and giant cell tumor of the tendon sheaths [ 1 ]. [jbsr.be]

[…] in an area of trauma) – verrucae (papules and plaques with a rough verrucal surface, and punctate black dots representing thrombosed vessels) – rheumatoid nodules (dermal nodules overlying extensor joints in patients with rheumatoid arthritis [RA]) – Heberden’s [dermatologyadvisor.com]

The differential diagnosis of KP includes other subcutaneous nodules like rheumatoid nodules, gouty tophi, Bouchard's and Heberden's nodes, synovial cysts, tumors (e.g. giant cell tumor of the tendons sheats, neurofibromas) or retained foreign bodies [ncbi.nlm.nih.gov]

nodes Scleroderma, morphea Diffuse scleroderma Localized scleroderma, morphea Lichen sclerosus et atrophicus Pachydermoperiostosis Eosinophilic fasciitis Fibromatosis Infantile digital fibromatosis (inclusion body fibromatosis) Intravascular fasciitis [atlases.muni.cz]

She had no morning stiffness, no paraesthesia and no pain during the night or other signs for inflammatory or mechanical pain. [ncbi.nlm.nih.gov]

However, there are several other conditions that may cause confusion including granuloma annulare, pachydermodactyly, rheumatoid nodules, and synovitis resulting in swollen joints. [dermnetnz.org]

Several conditions can be confused with Knuckle pads. We describe a case of a 47-years-old man who developed multiple bilateral roundish nodules located in the skin over the dorsal and lateral interphalangeal joints in both hands. [pubfacts.com]