# Porokeratosis ptychotropica with mycotic superinfection in a 68-year-old man

**Authors:** Jana Roßner, Alexander Enk, Ferdinand Toberer

PMC · DOI: 10.1007/s00105-025-05594-x · 2025-10-10

## TL;DR

This paper reports a rare case of porokeratosis ptychotropica with fungal infection in a 68-year-old man.

## Contribution

It presents a clinical and histological case of a rare subtype of porokeratosis with mycotic superinfection.

## Key findings

- Porokeratosis ptychotropica is a rare subtype of porokeratosis with specific clinical features.
- The condition is associated with poor treatment outcomes and high recurrence rates.
- Histological examination reveals the characteristic cornoid lamella.

## Abstract

Die Porokeratosis ptychotropica stellt eine sehr seltene Unterform der Porokeratosen, einer heterogenen Gruppe erblicher Verhornungsstörungen, dar. Es kommt zu verrukösen, großflächigen, hyperkeratotischen Plaques in der Perigenital‑, Gluteal- und Inguinalregion. Histologisch weisen die Porokeratosen eine pathognomonische Veränderung auf, die sog. kornoide Lamelle. Die Behandlungsergebnisse sind meist enttäuschend und mit hohen Rezidivraten verbunden.

## Full-text entities

- **Diseases:** inherited keratinization disorders (MESH:D030342), Porokeratosis ptychotropica (MESH:D017499), mycotic (MESH:D000785)

## Figures

3 figures with captions in the complete paper: https://tomesphere.com/paper/PMC13009038/full.md

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Source: https://tomesphere.com/paper/PMC13009038