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Transient Pigmentary and Demarcation Lines in a Newborn: A Case Report

Year: 2026

Type: article

Abstract: Transient pigmentary lines of the newborn (TPLN) is a rare, benign condition characterized by spontaneously resolving hyperpigmented linear patches oriented along skin lines across the trunk and extremities. We report the case of a seven-week-old female who presented with innumerable hyperpigmented lines on the abdomen, dorsal feet, and ankles, as well as a sharp demarcation line separating different pigmentary segments of the upper and mid-chest from lower chest and abdomen. These findings all resolved by 1 year of age. This case expands our understanding of TPLN's variable presentations, possible etiology, and supports its classification as a self-limited, non-pathologic entity.

Source: Pediatric Dermatology

DOI: 10.1111/pde.70188

Authors: Mason McDowell, Joshua Wan, Hannah E. Mumber, Margaret S. Lee

Institutions: Boston University, George Washington University, Hospital of the University of Pennsylvania, University of Pennsylvania

Language: English

Topic: Genetic and rare skin diseases.

Subfield: Genetics

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

SDG: Good health and well-being

Open Access status: green

OpenAlex ID: W7154169417

FWCI:

Cites: 7

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