INFILTRATIVE DISEASES
Acral persistent papular mucinosis – mimicking knuckle pads
AD 140:121–126, 2004; JAAD 27:1026–1029, 1992
Focal mucinosis
Lichen myxedematosis – resembling acral persistent papular
mucinosis
BJD 144:594–596, 2001; Dermatology 185:81, 1992
Mastocytoma
Caputo p.100, 2000; knuckle pads
Self-healing juvenile cutaneous mucinosis – knuckle nodules
JAAD 50:S97–100, 2004; Ped Derm 20:35–39, 2003;
JAAD 31:815–816, 1994; JAAD 11:327–332, 1984
INFLAMMATORY DISEASES
Sarcoid
METABOLIC DISEASES
Acromegaly
Calcinosis cutis
Diabetic finger pebbling (Huntley’s papules)
Cutis 69:298–300,
2002
Gout – tophi
Arch Orthop Trauma Surg 120:482–483, 2000
Porphyria – erythropoietic protoporphyria
Thyroid acropachy
Xanthomas – tuberous or tendinous xanthomas
NEOPLASTIC DISEASES
Enchondromas
Epidermoid cyst
Fibroma of the tendon sheath
Cutis 59:133, 1997
Ganglion cyst
Giant cell tumor of the tendon sheath – nodules of the fingers
Cutis 59:133, 1997; J Dermatol 23:290–292, 1996; overlying
dorsal digital interphalangeal crease
J Hand Surg 5:39–50, 1980
Keloids
Melanocytic nevus
Rook p.1722–1723, 1998, Sixth Edition
Mobile encapsulated lipomas
Cutis 49:63–64, 1992
Myxoid cyst, digital
JAAD 43:892, 2000; Rook p.2849, 1998,
Sixth Edition
Poroid hidradenoma
Cutis 50:42–46, 1992
Progressive nodular fibrosis of the skin
PARANEOPLASTIC DISORDERS
Dermatomyositis
PHOTODERMATOSES
Degenerative collagenous plaques of the hands
PRIMARY CUTANEOUS DISEASES
Acanthosis nigricans
Acrokeratoelastoidosis of Costa – knuckle pads
AD 140:479–484, 2004; Ped Derm 19:320–322, 2002;
JAAD 22:468–476, 1990; Acta DV 60:149–153, 1980;
Dermatologica 107:164–168, 1953
Acrokeratosis verruciformis of Hopf
Dupuytren’s disease – dorsal variant
Ann Chir Main 7:247–250,
1988 (Fr)
Dyshidrosis with id reaction
Epidermolysis bullosa, dominant dystrophic
Epidermolytic hyperkeratosis associated with palmoplantar
keratoderma
BJD 125:496, 1991
Erythema elevatum diutinum – knuckle pads, papules
JAAD 49:764–767, 2003; Cutis 67:381–384, 2001; Ped Derm
15:411–412, 1998
Granuloma annulare
JAAD 3:217–230, 1980; subcutaneous
granuloma annulare mimicking knuckle pads; perforating
granuloma annulare
Hidrotic ectodermal dysplasia
Juvenile fibromatosis
Knuckle pads – idiopathic (fibromatosis), keratotic knuckle
pads unassociated with palmoplantar keratoderma
Rook
p.1555–1556, 1998, Sixth Edition; trauma-induced, associated
with Dupuytren’s contracture, Ledderhose’s disease, Peyronie’s
disease, Bart–Pumphrey syndrome – sensorineural deafness,
leukonychia, and knuckle pads; autosomal dominant
Ped Derm
17:450–452, 2000; Cutis 57:241–242, 1996
Lichen nitidus – knuckle pads
AD 134:1302–1303, 1998
Lichen planus
Lichen simplex chronicus
Necrolytic acral erythema – serpiginous, verrucous plaques
of dorsal aspects of hands, legs; associated with hepatitis C
infection
JAAD 50:S121–124, 2004
Neurofibromatosis
Pachydermodactyly – benign fibromatosis of fingers of young
men
AD 111:524, 1975
Palmoplantar keratoderma, epidermolytic (Vorner) – papules on
knuckles
BJD 125:496, 1991
Prurigo nodularis
Psoriasis
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