# Merciful Malady: Renbök Phenomenon Between Alopecia Areata and Psoriasis Vulgaris

## TL;DR

This case report describes a rare phenomenon where one skin condition improves when another appears in a young girl.

## Contribution

The paper presents a unique case of the Renbök phenomenon between alopecia areata and psoriasis vulgaris.

## Key findings

- The patient showed hair loss areas free from scaly plaques when psoriasis appeared.
- The case highlights a possible immunological link between the two autoimmune diseases.
- The phenomenon suggests a temporary remission of one condition with the onset of the other.

## Abstract

RenbÖk phenomenon is the withdrawal of one clinical lesion when another lesion appears. This is a case report of an 11-year-old girl with multiple hyperpigmented scaly plaques over the scalp, trunk, and bilateral upper and lower limbs. The patient also had patchy hair loss over the scalp, which was spared from the scaly plaques. The case report thus elaborates on a fascinating immunological mechanism between the two autoimmune diseases that spares the patient from one disorder should the other appear.