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Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus

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Published on: May 16, 2025

Unilateral linear punctate palmoplantar keratoderma.

Sudhanshu Sharma¹, Krishna Deb Barman, Vijay Kumar Garg

¹Department of Dermatology and Venereology, Maulana Azad Medical College and Associated Hospital, New Delhi, India.

Indian Journal of Dermatology, Venereology and Leprology

|December 27, 2011

Summary

A rare linear variant of punctate palmoplantar keratoderma, a condition causing skin thickening on palms and soles, was observed unilaterally in a child. This unique presentation has not been previously documented in medical literature.

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Area of Science:

Dermatology
Medical Genetics

Background:

Punctate palmoplantar keratoderma (PPKP), also known as Brauer-Buschke-Fischer syndrome, is a rare condition characterized by small, pinpoint thickenings on the palms and soles.
Linear presentations of PPKP are exceptionally rare, with limited data on their incidence.
Unilateral involvement of linear punctate palmoplantar keratoderma has not been previously reported in scientific literature.

Purpose of the Study:

To report the first documented case of unilateral linear punctate palmoplantar keratoderma.
To describe the clinical and histological features of this rare dermatological condition in a pediatric patient.

Main Methods:

Case report of a 12-year-old child.
Clinical examination of the affected areas (left sole and hand).
Histopathological analysis of the skin lesion.

Main Results:

The patient presented with an asymptomatic linear plaque exhibiting punctate keratoderma on the left sole and hand.
Histology showed hyperkeratotic epidermis.
Key features of other keratodermas, such as columns of parakeratosis or a cornified lamella, were absent.

Conclusions:

This case represents the first report of unilateral linear punctate palmoplantar keratoderma.
The findings expand the known spectrum of punctate palmoplantar keratoderma presentations.
Histological examination is crucial for differentiating this rare variant from other palmoplantar keratodermas.