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Case Rep Dermatol Med. 2017;2017:9359086. doi: 10.1155/2017/9359086. Epub 2017 Mar 23.

Development of Asymmetric Facial Depigmentation in a Patient Treated with Dasatinib with New-Onset Hypovitaminosis D: Case Report and Review of the Literature.

Case reports in dermatological medicine

Kirsten C Webb, Magdalena Harasimowicz, Monica Janeczek, Jodi Speiser, James Swan, Rebecca Tung

Affiliations

  1. Department of Dermatology, Loyola University Chicago, Chicago, IL, USA.
  2. Stritch School of Medicine, Loyola University Chicago, Chicago, IL, USA.
  3. Department of Pathology, Loyola University Chicago, Chicago, IL, USA.

PMID: 28424749 PMCID: PMC5382301 DOI: 10.1155/2017/9359086

Abstract

Dasatinib is a second-generation tyrosine kinase inhibitor (TKI) used to treat imatinib-resistant chronic myelogenous leukemia (CML), as well as other Philadelphia chromosome-positive lymphoproliferative disorders. While the most commonly reported cutaneous side effects with this therapy include a morbilliform eruption, skin exfoliation, and skin irritation, pigmentary abnormalities have also been observed, albeit much more rarely. We present the case of a 72-year-old South Asian male with CML who presented with new-onset hypopigmentation of his face and scalp three years after a dose increase of dasatinib therapy, in the setting of newly discovered borderline hypovitaminosis D. Dasatinib and the other TKIs are believed to induce dyschromias via modulation of the c-kit receptor and its associated signaling pathway, which is involved in melanocyte survival, proliferation, and migration.

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