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Pityriasis lichenoides

MONDO:0024249

A rare cutaneous disorder of unknown etiology that can present either as an acute condition, with multiple papular lesions which become vesicular and necrotic (pityriasis lichenoides et varioliformis acuta) or chronic, with small, scaling papules (pityriasis lichenoides chronica).

Also known as: Pityriasis Lichenoides, pityriasis lichenoides, acute Pityriasis Lichenoides, chronic Pityriasis Lichenoides, Pityriasis Lichenoides chronica, Pityriasis Lichenoides et Varioliformis Acuta, Pityriasis Lichenoides, acute, Pityriasis Lichenoides, chronic

2 clinical trials for this condition and its sub-types, 1 tagged with Pityriasis lichenoides itself.

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Where it sits in the disease tree

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Part of

↑ Skin vascular disease (134) ↑ Exanthem (28) ↑ Parapsoriasis (1)

Sub-types of Pityriasis lichenoides

Acute lichenoid pityriasis 1 trial
1 sub-type
- Febrile ulceronecrotic Mucha-Habermann disease 0 trials

Including sub-types (2) Tagged with Pityriasis lichenoides (1)

Not yet finished but already full! 1

AI reads skin biopsies to spot hidden lymphomas

Diagnosis Ongoing

This study is developing and testing an artificial intelligence model that analyzes images of skin biopsies to tell the difference between malignant lymphomas (like mycosis fungoides) and benign conditions that look similar. The AI will be trained on hundreds of archived slides a…

Sponsor: Cairo University • Aim: Diagnosis

Last updated Jul 17, 2026 00:00 UTC

Pityriasis lichenoides

Where it sits in the disease tree

AI reads skin biopsies to spot hidden lymphomas