Ashy dermatosis and lichen planus pigmentosus: the histopathological differences

Not Applicable

Completed

• Conditions: Ashy dermatosis and lichen planus pigmentosus; Ashy dermatosis, Lichen planus pigmentosus, Acquired macular pigmentation of unknown aetiology, Pigmentary incontinence, Postinflammatory hyperpigmentation, Pigmented contact dermatitis

• Registration Number: TCTR20190524004
• Lead Sponsor: Division of Dermatology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Study Completion: 2018-08-24
• Study Start: 2019-05-24
• Last Update Posted: 19 August 2024

Recruitment & Eligibility

• Status: Completed
• Sex: All
• Target Recruitment: 100

Inclusion Criteria

•Patients with ashy dermatosis(AD) or lichen planus pigmentosus (LPP) as definite or differential diagnosis from the past 10 years

•Available photographs that are consistent with AD or LPP

•Available biopsy specimen from hyperpigmented lesion

Exclusion Criteria

Any medications that can cause lichenoid drug eruption

History suggesting pigmented contact dermatitis

History of preceding erythematous lesions, suggesting PIH

Histopathology suggesting other pathology e.g. dermal melanocytosis, amyloidosis etc.

Study & Design

• Study Type: Observational
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Histopathological changes when biopsy specimens were obtained Evaluation by specialist

Secondary Outcome Measures

Name	Time	Method
Clinico-pathological correlation when photographs and biopsy specimens were obtained Evaluation by specialist