In a recent past, the incidence of syphilis has increased in various geographical regions. The authors describe a case of secondary syphilis mimicking palmoplantar psoriasis.

Pachyonychia congenita (PC) is a rare autosomal dominant genetic skin disorder due to a mutation in any one of the five keratin genes, KRT6A, KRT6B, KRT6C, KRT16, or KRT17. The main features are palmoplantar keratoderma, plantar pain, and nail dystrophy. Cysts of various types, follicular hyperkeratosis, oral leukokeratosis, hyperhidrosis, and natal teeth may also be present. Four unrelated Ind...

Erythema gyratum reopens is a slowly expanding, mildly scaling dermatosis with a "wood-grain" pattern and is seen in patients with an underlying malignancy. To date only 49 cases have appeared in the literature, 41 of which (84%) were associated with a neoplasm, most commonly of the lung. Several patients also had pruritus, palmoplantar keratoderma, ichthyosis, vesiculobullous lesions, and/or e...

Circumscribed palmoplantar hypokeratosis is a recently recognized dermatosis and rarely reported. It was first described in 2002 and is characterized by localized loss of the horny layer in the palmoplantar area. This dermatosis is clinically presented with a sharply circumscribed, reddish and asymptomatic plaque with slightly depressed surface localized on the palms or the soles. The clinical ...

Pachyonychia congenita comprises a heterogeneous group of autosomal dominantly inherited conditions manifesting with characteristic nail thickening, palmoplantar keratoderma, follicular keratosis and oral manifestations like mucosal leukokeratosis. Less frequently epidermal cysts, hair-shaft abnormalities, natal teeth and laryngeal involvement may be seen. It is distributed almost evenly throug...