Finger ankle pads real M72.1

Superficial fibromatosis is a circumscribed, cushion-like, fibrotic thickening that is located on the stretching side above the finger (toe) joints.

Fibromatosis of unknown etiology. Often in combination with other fibromatoses of the adult(Dupuytren's contracture, induratio penis plastica); not infrequently a tendency to keloid is observed.

S.a. the occurrence of idiopathic Knuckle Pads in:

• polyfibromatosis, see also Bart-Pumphrey syndrome
• Dupuytren's contracture
• Induratio penis plastica (Peyronie's disease)
• Palmoplantar keratoses

Some authors state an autosomal dominant inheritance.

Pea-size, flat raised, coarse, pad-like, skin-coloured or yellow-brown papules or plaques with a granular, bumpy, woolly surface.

Xanthom

Fibroma

Callus

fake knuckle pads: mechanically induced hyperkeratosis

Keratosis palmoplantaris transgrediens.

Fibromatoses are a heterogeneous group of new formations of connective tissue, which nosologically stand between reactive new formations and true neoplasias. Especially congenital forms and familial occurrence and the detection of mutations (see below fibromatosis, hyaline juvenile) speak, at least for some members of this group of diseases, for a genetic basis.

1. Chamberlain AJ et al (2003) Pachydermodactyly: a forme fruste of knuckle pads? Australas J Dermatol 44: 140-143
2. Garrod AE (1893) On an unusual form of nodule upon joints of the fingers. St Bartholomew's Hosp Rep 29: 157-161

3. Hayashi M et al (2012) Case of epidermolytic palmoplantar keratoderma with knuckle pads. J Dermatol 39:84-87

4. Hyman CH et al (2013) Report of a family with idiopathic knuckle pads and review of idiopathic and disease-associated knuckle pads. Dermatol Online J 19:18177

5. Lin Z, Zhao J et al (2015) Loss-of-function mutations in CAST Cause Peeling Skin, Leukonychia, Acral Punctate Keratoses, Cheilitis, and Knuckle Pads. On J Hum Genet 96:440-447