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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.

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    1. Pohl-Pinkus constrictions of hair following chemotherapy for Hodgkin's disease British Journal of Haematology · 2005 · 8 citations
    2. Trichoscopy of alopecia areata: An update The Journal of Dermatology · 2018 · 89 citations
    3. Trichoscopic clues for the diagnosis of alopecia areata Türkderm Türk deri hastalıkları ve frengi arşivi · 2020 · 2 citations
    4. Pediatric Radiation-Induced Alopecia Post Intracranial Vascular Malformation Embolization: A Case Report with Dermoscopic Findings Clinical Cosmetic and Investigational Dermatology · 2026
    5. A Prospective Study of Dermoscopic and Ultrastructural Features of Vitiligo-Associated Leukotrichia Clinical, cosmetic and investigational dermatology · 2023
    6. Efluvio anágeno. Hallazgos tricoscópicos Revista Dermatológica Centro Uraga · 2020
    7. Dermoscopic And Clinical Features Of Alopecia Areata In Pakistani Patients: A Cross-Sectional Study Journal of Rawalpindi Medical College · 2025
    8. Telogen Effluvium due to Recombinant Interferon α-2b Dermatology · 2009 · 45 citations
    9. Monitoring chemotherapy‐induced alopecia with trichoscopy Journal of Cosmetic Dermatology · 2018 · 23 citations
    10. When the algorithm fails and experience wins: An extraordinary trichoscopic case Forum Dermatologicum · 2026
    11. Comparative Study of Trichoscopic Features of Alopecia Areata between Adults and Children and between Different Body Parts (Scalp, Beard, Eyebrow, and Moustache) Indian Journal of Dermatology · 2024 · 2 citations
    12. Hair Loss Pattern due to Chemotherapy-Induced Anagen Effluvium: A Cross-Sectional Observation Dermatology · 2007 · 53 citations
    13. Hair shaft abnormalities after chemotherapy and tamoxifen therapy in patients with breast cancer evaluated by optical coherence tomography British Journal of Dermatology · 2012 · 16 citations
    14. Evaluation of SALT score severity in correlation with trichoscopic findings in alopecia areata: a study of 303 patients Archives of Dermatological Research · 2025 · 7 citations
    15. Pigmented vellus and upright regrowing hairs as the only predictive trichoscopic markers of hair regrowth in alopecia totalis and universalis Dermatology Review · 2019 · 2 citations
    16. Clinical and trichoscopic features of early congenital syphilis: a single-center cross-sectional study Frontiers in Medicine · 2026
    17. Plica Neuropathica (Polonica) Secondary to Diffuse Alopecia: A Case Report and Literature Review Cureus · 2025
    18. Drug-Induced Hair Disorders Current Drug Safety · 2006 · 40 citations
    19. Drug Reactions Affecting Hair: Diagnosis Dermatologic Clinics · 2007 · 85 citations
    20. Hair Shaft Dysplasias International Journal of Dermatology · 1988 · 19 citations
    21. Involvement of scalp and nails in lupus erythematosus Lupus · 2010 · 44 citations
    22. Trichoscopy in Hair Shaft Disorders Dermatologic Clinics · 2018 · 36 citations
    23. Hair and nail involvement in lupus erythematosus Clinics in Dermatology · 2004 · 18 citations
    24. Chemotherapy-Induced Hair Loss: The Use of Biomarkers for Predicting Alopecic Severity and Treatment Efficacy Biomarker Insights · 2019 · 10 citations
    25. Dermoscopy of Hair and Scalp Disorders (Trichoscopy) in Skin of Color—A Systematic Review by the International Dermoscopy Society “Imaging in Skin of Color” Task Force Dermatology practical & conceptual · 2023 · 2 citations
    26. Hair and Scalp Dermatoscopy (Trichoscopy) Elsevier eBooks · 2018 · 2 citations
    27. Alopecia Areata and Alopecia Areata Incognita Elsevier eBooks · 2018 · 1 citations
    28. An Ayurvedic Diagnostic Approach to Understanding Trichoscopic Findings in Hair Loss: A Conceptual Review International Journal of Ayurvedic Medicine (Hyderabad) · 2026
    29. An Ayurvedic Diagnostic Approach to Understanding Trichoscopic Findings in Hair Loss: A Conceptual Review International Journal of Ayurvedic Medicine · 2026
    30. Scalp hair cortisol concentration in patients with alopecia areata and correlate its level with the disease variables International Journal of Dermatology Venereology and Leprosy Sciences · 2025