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Glossary Pohl-Pinkus constrictions

narrow, weakened areas on hair shafts from growth disruptions

Pohl-Pinkus constrictions are narrow, weakened areas along the hair shaft that can occur due to temporary disruptions in hair growth, often caused by physical or emotional stress, illness, or nutritional deficiencies. These constrictions can make the hair more prone to breakage and are sometimes used as indicators of past physiological stress in trichological examinations.

Research

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research Pohl-Pinkus constrictions of hair following chemotherapy for Hodgkin's disease

8 citations , February 2005 in “British Journal of Haematology”

This report describes a case of a man developing hair changes, including Beau's lines and Pohl-Pinkus constrictions, following ABVD chemotherapy.

research Trichoscopy of alopecia areata: An update

89 citations , March 2018 in “The Journal of Dermatology”

This review presents various trichoscopic findings for diagnosing alopecia areata but reports no new clinical results, emphasizing that no single marker is pathognomonic and multiple features should be considered together.

research Trichoscopic clues for the diagnosis of alopecia areata

2 citations , June 2020 in “Türkderm Türk deri hastalıkları ve frengi arşivi”

Yellow dots and short vellus hairs are key signs for diagnosing alopecia areata using trichoscopy.

research Dermoscopic And Clinical Features Of Alopecia Areata In Pakistani Patients: A Cross-Sectional Study

January 2025 in “Journal of Rawalpindi Medical College”

In this study, among 800 Pakistani patients with Alopecia Areata, the most common location for hair loss was the scalp (89.9%), with significant associations between age and various dermoscopic features like black dots and exclamation mark hairs.

research Efluvio anágeno. Hallazgos tricoscópicos

January 2020 in “Revista Dermatológica Centro Uraga”

This article describes how recognizing distinct trichoscopic features aids in diagnosing various dermatological conditions and hair loss, but it reports no new clinical findings.

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