{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,9]],"date-time":"2026-07-09T16:18:46Z","timestamp":1783613926451,"version":"3.55.0"},"reference-count":17,"publisher":"S. Karger AG","license":[{"start":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T00:00:00Z","timestamp":1779321600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"},{"start":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T00:00:00Z","timestamp":1779321600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Skin Appendage Disord"],"abstract":"<jats:p>Introduction: Telogen effluvium (TE) is a recognized sequel of COVID-19 infection, often exhibiting an accelerated onset that suggests a pathomechanism distinct from classical TE. This study aims to define the unique trichoscopic and histopathological features of post-COVID-19 TE and to correlate these novel findings with prior systemic disease severity. Methods: Trichoscopy images and pathology specimens of 13 patients (12 women, 1 man; mean age 46.2 years) who developed TE after PCR-confirmed COVID-19 infection were retrospectively reviewed. Statistical analysis correlated trichoscopic findings with the need for supplementary oxygen during acute infection. Results: Trichoscopy showed thick, livedoid arborizing vessels in most cases, with giant serpiginous vessels in 38% of patients. The presence of giant vessels showed a strong statistical correlation with the requirement of supplementary oxygen during hospitalization (p = 0.001). Histopathology confirmed a catagen\/telogen shift and consistently revealed a superficial perivascular and perifollicular lymphocytic infiltrate in all cases. Conclusion: Vascular patterns can distinguish post-COVID-19 TE. The perifollicular lymphocytic infiltrate supports a direct viral or localized immune-mediated insult.<\/jats:p>","DOI":"10.1159\/000552511","type":"journal-article","created":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T16:01:38Z","timestamp":1779379298000},"page":"1-7","source":"Crossref","is-referenced-by-count":0,"title":["The Value of Trichoscopy and Histopathology in the Diagnosis of Post-COVID-19 Telogen Effluvium"],"prefix":"10.1159","author":[{"given":"Mar\u00eda Abril","family":"Mart\u00ednez-Velasco","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Curtis","family":"Thompson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonella","family":"Tosti","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marla Daniela","family":"Olivas-Altamirano","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4923-8880","authenticated-orcid":false,"given":"Hassiel Aurelio","family":"Ram\u00edrez-Mar\u00edn","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"127","published-online":{"date-parts":[[2026,5,21]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cmi.2020.09.023"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1007\/s13555-017-0171-8"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1111\/exd.14352"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.3121\/cmr.2009.863"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1016\/j.jdin.2022.02.006"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1038\/s41584-020-0448-7"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1002\/jmv.27534"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.4103\/idoj.idoj_139_22"},{"key":"ref9","doi-asserted-by":"publisher","DOI":"10.1093\/ced\/llad366"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1016\/S2213-2600(20)30216-2"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1111\/dth.15175"},{"key":"ref12","doi-asserted-by":"publisher","DOI":"10.2147\/CCID.S200471"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.1111\/jdv.18342"},{"key":"ref14","doi-asserted-by":"publisher","DOI":"10.1111\/exd.14259"},{"key":"ref15","doi-asserted-by":"publisher","DOI":"10.3389\/fmed.2020.594495"},{"key":"ref16","doi-asserted-by":"publisher","DOI":"10.3389\/fimmu.2024.1337406"},{"key":"ref17","doi-asserted-by":"publisher","DOI":"10.1016\/j.intimp.2022.109183"}],"container-title":["Skin Appendage Disorders"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/karger.com\/article-pdf\/doi\/10.1159\/000552511","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,7,9]],"date-time":"2026-07-09T16:01:08Z","timestamp":1783612868000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000552511"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,5,21]]},"references-count":17,"URL":"https:\/\/doi.org\/10.1159\/000552511","archive":["Portico"],"relation":{},"ISSN":["2296-9195","2296-9160"],"issn-type":[{"value":"2296-9195","type":"print"},{"value":"2296-9160","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,5,21]]}}}