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Research Article: Spiny Keratoderma in Association with Melanoma

Date Published: 2023-05-22

Abstract:
Spiny keratoderma (SK) was first described by Brown in 1871 and is characterized by numerous 1–2 mm spines of keratin on the palms and soles, usually sparing the dorsal surfaces, or disseminated over the trunk. Histologically, the “spine” represents a column of hyperkeratosis. Several different forms are known, including familial, sporadic, post-inflammatory and paraneoplastic. Although an association of SK with melanoma has been reported, the significance of such co-occurrence remains unclear due to the limited number of cases. To increase the body of knowledge and shed further light on this rare condition, we present a case of SK in a patient with a recent history of melanoma in situ.

Introduction:
Spiny keratoderma (SK) was first described in 1871 by Brown, who referred to it as punctate keratoderma [1]. Since then, due primarily to its rarity, the entity has acquired a variety of names (i.e., punctate porokeratosis, follicular hyperkeratosis, porokeratosis punctata palmaris et plantaris, filiform hyperkeratosis, hyperkeratotic spicules, etc.). The term “spiny keratoderma” was first introduced by Osman et al. in 1992 and then successfully incorporated in the modern dermatopathology verbiage [2].

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