BRAF-mutated histiocytosis of the skull lacking the expression of Langerhans cell markers
- 1 March 2020
- journal article
- research article
- Published by Dustri-Verlgag Dr. Karl Feistle in Clinical Neuropathology
- Vol. 39 (03), 64-69
- https://doi.org/10.5414/np301225
Abstract
Langerhans cell histiocytosis (LCH) is a rare condition affecting children more frequently than adults. LCH can involve any organ in the body and has a wide spectrum of clinical presentation from a single self-healing bone lesion to a multisystemic life-threatening disease. The diagnosis of LCH requires histology with compatible clinical and radiological findings. Positive immunochemistry for both CD1a and CD207 is required for a definitive diagnosis of LCH. The majority of LCH shares oncogenic BRAF(V600E) mutation. We report the case of a 55-year-old adult who presented with a single lytic self-healing lesion of the skull, invading adjacent soft tissues. The histology and cytology were also typical of LCH, and tumor cells contained the BRAF(V600E) mutation. However, histiocytes were negative for CD1a and CD207. We suggest that this case might be considered as LCH, despite its abnormal phenotype.Keywords
This publication has 16 references indexed in Scilit:
- BRAF Mutation Correlates With High-Risk Langerhans Cell Histiocytosis and Increased Resistance to First-Line TherapyJournal of Clinical Oncology, 2016
- Langerhans cell histiocytosis: therapeutic strategy and outcome in a 30‐year nationwide cohort of 1478 patients under 18 years of ageBritish Journal of Haematology, 2016
- ETV3-NCOA2 in indeterminate cell histiocytosis: clonal translocation supports sui generisBlood, 2015
- How I treat Langerhans cell histiocytosisBlood, 2015
- Evidence of BRAF V600E in indeterminate cell tumor and interdigitating dendritic cell sarcomaAnnals of Diagnostic Pathology, 2015
- Consensus guidelines for the diagnosis and clinical management of Erdheim-Chester diseaseBlood, 2014
- Pathogenesis of Langerhans Cell HistiocytosisAnnual review of pathology, 2013
- Management of adult patients with Langerhans cell histiocytosis: recommendations from an expert panel on behalf of Euro-Histio-NetOrphanet Journal of Rare Diseases, 2013
- Recurrent BRAF mutations in Langerhans cell histiocytosisBlood, 2010
- A Lack of Birbeck Granules in Langerhans Cells Is Associated with a Naturally Occurring Point Mutation in the Human Langerin GeneJournal of Investigative Dermatology, 2005