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Goyal G, Tazi A, Go RS, Rech KL, Picarsic JL, Vassallo R, Young JR, Cox CW, Van Laar J, Hermiston ML, Cao XX, Makras P, Kaltsas G, Haroche J, Collin M, McClain KL, Diamond EL, Girschikofsky M. International expert consensus recommendations for the diagnosis and treatment of Langerhans cell histiocytosis in adults. Blood 2022; 139:2601-2621. [PMID: 35271698 PMCID: PMC11022927 DOI: 10.1182/blood.2021014343] [Citation(s) in RCA: 56] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 02/24/2022] [Indexed: 11/20/2022] Open
Abstract
Langerhans cell histiocytosis (LCH) can affect children and adults with a wide variety of clinical manifestations, including unifocal, single-system multifocal, single-system pulmonary (smoking-associated), or multisystem disease. The existing paradigms in the management of LCH in adults are mostly derived from the pediatric literature. Over the last decade, the discovery of clonality and MAPK-ERK pathway mutations in most cases led to the recognition of LCH as a hematopoietic neoplasm, opening the doors for treatment with targeted therapies. These advances have necessitated an update of the existing recommendations for the diagnosis and treatment of LCH in adults. This document presents consensus recommendations that resulted from the discussions at the annual Histiocyte Society meeting in 2019, encompassing clinical features, classification, diagnostic criteria, treatment algorithm, and response assessment for adults with LCH. The recommendations favor the use of 18F-Fluorodeoxyglucose positron emission tomography-based imaging for staging and response assessment in the majority of cases. Most adults with unifocal disease may be cured by local therapies, while the first-line treatment for single-system pulmonary LCH remains smoking cessation. Among patients not amenable or unresponsive to these treatments and/or have multifocal and multisystem disease, systemic treatments are recommended. Preferred systemic treatments in adults with LCH include cladribine or cytarabine, with the emerging role of targeted (BRAF and MEK inhibitor) therapies. Despite documented responses to treatments, many patients struggle with a high symptom burden from pain, fatigue, and mood disorders that should be acknowledged and managed appropriately.
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Affiliation(s)
- Gaurav Goyal
- Division of Hematology-Oncology, University of Alabama at Birmingham, Birmingham, AL
| | - Abdellatif Tazi
- Université de Paris, INSERM UMR 976, Saint Louis Research Institute, Paris, France
- French National Reference Center for Histiocytoses, Department of Pulmonology, Saint-Louis Teaching Hospital, Assistance Publique-Hôpiaux de Paris, Paris, France
| | | | - Karen L. Rech
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN
| | - Jennifer L. Picarsic
- Division of Pathology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | | | | | | | - Jan Van Laar
- Department of Internal Medicine
- Department of Immunology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Michelle L. Hermiston
- Division of Pediatric Hematology-Oncology, University of California, San Francisco, San Francisco, CA
| | - Xin-Xin Cao
- State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Polyzois Makras
- LCH Adult Clinic
- Department of Endocrinology and Diabetes, 251 Hellenic Air Force and VA General Hospital, Athens, Greece
| | - Gregory Kaltsas
- 1st Propaedeutic Department of Internal Medicine, National and Kapodistrian University of Athens, Greece
| | - Julien Haroche
- Service de médecine interne 2, Centre de Référence des Histiocytoses, Hôpital Pitié-Salpêtrière, Assistance Publique des Hôpitaux de Paris (APHP), Sorbonne Université, Paris, France
| | - Matthew Collin
- Newcastle University and Newcastle Upon Tyne Hospitals, Newcastle Upon Tyne, United Kingdom
| | - Kenneth L. McClain
- Texas Children's Cancer and Hematology Centers, Department of Pediatrics, Baylor College of Medicine, Houston, TX
| | - Eli L. Diamond
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Michael Girschikofsky
- Internal Medicine I (Hemostasis, Hematology and Stem, Cell Transplantation and Medical Oncology), Ordensklinikum Linz Elisabethinen, Linz, Austria
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Plemel DJA, Benson MD, Tong CM, Mahmood MN, Pollock TJ. Nonosseous Periocular Manifestations of Langerhans Cell Histiocytosis: A Case Report and Systematic Review. Ophthalmic Plast Reconstr Surg 2021; 37:408-413. [PMID: 33315841 DOI: 10.1097/iop.0000000000001906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE Langerhans cell histiocytosis (LCH) is a disorder of dendritic cell proliferation that typically involves bone. It can be diagnostically challenging when LCH presents without bony involvement, leading to delays in diagnosis and treatment. In this study, the periocular manifestations of LCH in cases where the underlying orbital bones are not involved are described through a systematic review. METHODS A systematic review of the literature was performed to capture all cases of LCH that involved the periocular region but not the underlying orbital bones. These included LCH cases that involved the periocular skin, the ocular surface, and the orbital tissue. The authors also highlight an additional case where LCH presented with periocular edema and multifocal, nodular conjunctival lesions. RESULT This review illustrates that LCH rarely presents with periocular infiltration without orbital bone involvement. In these atypical cases, LCH can present as an eyelid mass, a chalazion-like lesion, generalized periocular swelling, ocular surface lesions, or infiltration of any orbital structure. Ocular surface LCH has a higher rate of recurrence than other periocular LCH. Orbital LCH can involve any tissue including extraocular muscles, the lacrimal gland, or indistinct areas within the orbit. CONCLUSIONS LCH is a clinicopathologic diagnosis. Although most cases involve the bone, any soft tissue can be involved. Biopsy is required to confirm the diagnosis of this heterogeneous disease.
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Affiliation(s)
| | | | - C Maya Tong
- Department of Ophthalmology and Visual Sciences
| | - Muhammad N Mahmood
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
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