<unk> s are a heterogeneous group of disorders characterized by abnormal thickening of the stratum corneum of the palms and soles. Autosomal recessive, dominant, X-linked, and acquired forms have all been described.
Palmoplantar keratoderma
Tar melanosis
Striate keratoderma
Hypertrichosis cubiti
Median nail dystrophy
Onychogryphosis
Prurigo simplex
Pustulosis palmaris et plantaris