{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T15:53:46Z","timestamp":1776873226177,"version":"3.51.2"},"reference-count":92,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2024,5,16]],"date-time":"2024-05-16T00:00:00Z","timestamp":1715817600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Background\/Objectives: Eosinophilic dermatosis of hematologic malignancy (EDHM) is a rare cutaneous disorder associated with various hematologic malignancies, most commonly chronic lymphocytic leukemia. Detailed clinicopathologic studies of EDHM are lacking and the pathogenesis remains enigmatic. Initially thought to be a hypersensitivity reaction to insect stings, subsequent reports have challenged this understanding. The prognostic implications of EDHM remain unclear. Methods: A retrospective clinicopathologic study was performed on patients diagnosed with EDHM. Hematologic and dermatologic data were reviewed. Histologic specimens were re-evaluated and lesions were classified into acute\/subacute, fully developed, and chronic\/regressing. Results: The study included 35 patients. In 80% of these patients, EDHM was diagnosed after the hematologic disorder. Approximately 45% of the cohort experienced hematologic disease progression or relapse, while 65% required therapeutic intervention during the course of their hematologic disease. In total, 15\/19 CLL patients had non-mutated IgHV, a marker of a more aggressive hematologic disease course. Dermatologic lesion morphology was heterogeneous, with most lesions occurring on exposed areas, and a significant 94% of patients demonstrated lesion seasonality. Histopathologic findings were consistent with features typically associated with insect bites. In addition, examination of lesions at different chronological stages revealed substantial similarities with Wells syndrome. Conclusions: Our findings support the potential role of insect bites in triggering EDHM in the context of adaptive immune dysfunction. EDHM may be associated with a more aggressive disease course or may be a marker of disease progression. The observed co-occurrence of features typical of Wells syndrome in EDHM patients suggests that these conditions are part of a spectrum of disorders that vary in clinical expression.<\/jats:p>","DOI":"10.3390\/jcm13102935","type":"journal-article","created":{"date-parts":[[2024,5,16]],"date-time":"2024-05-16T06:44:31Z","timestamp":1715841871000},"page":"2935","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Eosinophilic Dermatosis of Hematologic Malignancy: Emerging Evidence for the Role of Insect Bites\u2014A Retrospective Clinico-Pathological Study of 35 Cases"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2711-6084","authenticated-orcid":false,"given":"Andrea","family":"Michelerio","sequence":"first","affiliation":[{"name":"Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, University of Pavia, 27100 Pavia, Italy"},{"name":"Dermatology Clinic, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1706-656X","authenticated-orcid":false,"given":"Marco","family":"Rubatto","sequence":"additional","affiliation":[{"name":"Department of Medical Sciences, Section of Dermatology, University of Turin, 10126 Turin, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7126-5506","authenticated-orcid":false,"given":"Gabriele","family":"Roccuzzo","sequence":"additional","affiliation":[{"name":"Department of Medical Sciences, Section of Dermatology, University of Turin, 10126 Turin, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2123-7675","authenticated-orcid":false,"given":"Marta","family":"Coscia","sequence":"additional","affiliation":[{"name":"Department of Molecular Biotechnology and Health Sciences, University of Turin, 10126 Turin, Italy"},{"name":"University Division of Hematology, A.O.U. Citt\u00e0 della Salute e della Scienza di Torino, 10126 Turin, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pietro","family":"Quaglino","sequence":"additional","affiliation":[{"name":"Department of Medical Sciences, Section of Dermatology, University of Turin, 10126 Turin, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carlo","family":"Tomasini","sequence":"additional","affiliation":[{"name":"Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, University of Pavia, 27100 Pavia, Italy"},{"name":"Dermatology Clinic, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,5,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"690","DOI":"10.1111\/j.1600-0560.2012.01906.x","article-title":"Eosinophilic dermatosis of hematologic malignancy","volume":"39","author":"Farber","year":"2012","journal-title":"J. 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