Letter: Pachydermodactyly: a variant of the true knuckle pad

Teenage boy with thickened dorsal hands and feet

“…Verbov initially described it in 1975. 3 PDD most commonly affects young men (male:female ratio 3.9:1). 2 Patients commonly present around puberty, with progression over several years and ultimately disease stabilization.…”

Pachydermodactylie : deux nouvelles observations

“…C'est Verbov [1] qui définit le terme de pachydermodactylie mais la considère comme une variété de coussinet fibreux des phalanges. Depuis 1975, plusieurs dizaines de cas ont été décrits dans la littérature, principalement dermatologique.…”

“…La pachydermodactylie, signalée d'abord par Verbov [1] en 1975, est une fibromatose très particulière atteignant la peau et les parties molles des articulations interphalangiennes proximales des 2 e , 3 e et 4 e doigts des deux mains, presque toujours chez l'adolescent, très rarement chez les jeunes filles. C'est une affection acquise de signification assez mystérieuse.…”

Pachydermodactyly – a report of two cases

“…Also in synovium and joints in ultrasound examination no alterations are observed [ 6 ]. The disorder was first described by Basex et al in 1973 [ 7 ], and named by Verbov in 1975: pachy – thick, dermos – skin, dactylos – fingers [ 8 ].…”

“…It has been suggested that multiple mechanical traumas, such as the habit of interlacing and rubbing the fingers, could lead to skin thickness, what causes secondary, mechanical dermatosis based on compulsive behaviours [ 3 – 11 ]. The classic type of disease can even simulate polyarticular JIA with involvement of small joints of the hands [ 3 , 8 – 10 , 12 ].…”