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Colmant C, Demers MA, Hatami A, Coulombe J, McCuaig CC, Piram M, Marcoux D, Kokta V, Powell J. Pediatric Cutaneous Hematologic Disorders: Cutaneous Lymphoma and Leukemia Cutis: Experience of a Tertiary-Care Pediatric Institution and Review of the Literature. J Cutan Med Surg 2022; 26:349-360. [PMID: 35167768 DOI: 10.1177/12034754221077694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Cutaneous hematologic malignancies are rare in children, and the literature about them is still sparse. OBJECTIVE The purpose of our study was to report our experience with pediatric cases of cutaneous hematologic disorders and describe their clinical and histological features. METHODS Data were retrospectively collected from the histopathologic database of the CHU Sainte-Justine, University of Montreal, Montreal, Canada. All patients up to 18 years of age with a diagnosis of a primary cutaneous lymphoma (including lymphomatoid papulosis), secondary cutaneous lymphoma or cutaneous manifestations of leukemia, followed from 1980 to 2019 at our center were reviewed. RESULTS Thirty-six patients were included. Age at presentation ranged from birth to 18 years of age (mean 7.83 ± 5.16; median 7.0). Ten different hematologic disorders were identified according to the WHO-EORTC classifications: lymphomatoid papulosis (10 cases), mycosis fungoides (6 cases), anaplastic large cell lymphoma (4 cases), pre-B acute lymphoid leukemia (5 cases), primary cutaneous marginal zone B-cell lymphoma (4 cases), primary cutaneous CD4+medium T-cell lymphoproliferative disorder (1 case), extranodal NK/T-cell lymphoma (1 case), hydroa vacciniforme-like lymphoproliferative disorder (1 case), B-cell lymphoblastic lymphoma (1 case) and acute myeloid leukemia (3 cases). CONCLUSION The most common subtype of cutaneous hematologic disease in our single institution study was lymphomatoid papulosis (type A and type C), followed by mycosis fungoides. Recognition of this large clinical and histological spectrum by dermatologists is important because diagnosis is often established by biopsy of skin lesions, even in secondary cutaneous cases. Moreover, the clinicopathological correlation is of utmost importance for the final diagnosis of those pathologies.
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Affiliation(s)
- Caroline Colmant
- Division of Pediatric Dermatology, Department of Pediatrics, Sainte-Justine University Hospital Center, University of Montreal, Montreal, Quebec, Canada
| | - Marc-André Demers
- Division of Pediatric Dermatology, Department of Pediatrics, Sainte-Justine University Hospital Center, University of Montreal, Montreal, Quebec, Canada
| | - Afshin Hatami
- Division of Pediatric Dermatology, Department of Pediatrics, Sainte-Justine University Hospital Center, University of Montreal, Montreal, Quebec, Canada
| | - Jerome Coulombe
- Division of Pediatric Dermatology, Department of Pediatrics, Sainte-Justine University Hospital Center, University of Montreal, Montreal, Quebec, Canada
| | - Catherine Cameron McCuaig
- Division of Pediatric Dermatology, Department of Pediatrics, Sainte-Justine University Hospital Center, University of Montreal, Montreal, Quebec, Canada
| | - Maryam Piram
- Division of Pediatric Dermatology, Department of Pediatrics, Sainte-Justine University Hospital Center, University of Montreal, Montreal, Quebec, Canada
| | - Danielle Marcoux
- Division of Pediatric Dermatology, Department of Pediatrics, Sainte-Justine University Hospital Center, University of Montreal, Montreal, Quebec, Canada
| | - Victor Kokta
- Department of Pathology, Sainte-Justine University Hospital Center, University of Montreal, Montreal, Quebec, Canada
| | - Julie Powell
- Department of Pathology, Sainte-Justine University Hospital Center, University of Montreal, Montreal, Quebec, Canada
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Hypopigmented Mycosis Fungoides: Loss of Pigmentation Reflects Antitumor Immune Response in Young Patients. Cancers (Basel) 2020; 12:cancers12082007. [PMID: 32707930 PMCID: PMC7465783 DOI: 10.3390/cancers12082007] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/14/2020] [Accepted: 07/16/2020] [Indexed: 12/15/2022] Open
Abstract
Hypopigmented mycosis fungoides (HMF) is a form of cutaneous T-cell lymphoma (CTCL), a heterogeneous group of extranodal non-Hodgkin's lymphomas. HMF has a unique set of defining features that include light colored to achromic lesions, a predilection for darker skin phototypes, an early onset of disease, and predominance of CD8+ T-cells, among others. In the current review, we detail the known pathways of molecular pathogenesis for this lymphoma and posit that an active Th1/cytotoxic antitumor immune response in part explains why this variant is primarily seen in children/adolescents and young adults, who do not exhibit signs of immunosenescence. As a result of this potent cytotoxic response, HMF patients experience mostly favorable overall prognosis, while hypopigmentation may in fact represent a useful surrogate marker of cytotoxic immunity targeting the malignant cells. Understanding the molecular processes behind the specific features that define HMF may lead to improved diagnostic accuracy, personalized prognosis by risk stratification, and improved management of HMF. Moreover, improving our knowledge of HMF may aid our further understanding of other cutaneous lymphomas.
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Ferreira BR, Ramos L, Cardoso JC, Reis JP, Tellechea O. Hypopigmented patches in childhood: do not forget mycosis fungoides. Clin Exp Dermatol 2018; 44:588-589. [PMID: 30294791 DOI: 10.1111/ced.13807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2018] [Indexed: 11/28/2022]
Affiliation(s)
- B R Ferreira
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - L Ramos
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - J C Cardoso
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - J P Reis
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - O Tellechea
- Department of Dermatology, Coimbra Hospital and University Centre, Coimbra, Portugal
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Abstract
This article focuses on cutaneous hematopoietic neoplasms that are more likely to be encountered in the pediatric age-group and includes both lymphoproliferative and histiocytic disorders. The cutaneous hematologic disorders in children have a different epidemiologic profile to what is seen during adulthood. Although mycosis fungoides is the most frequent form of cutaneous lymphoma in adults, it is very rare in children. Because lymphoblastic leukemias and lymphomas are more frequent in the pediatric setting, cutaneous leukemic infiltrates are relatively common in this age-group. Similarly, histiocytic disorders are more common in children, particularly Langerhans cell histiocytosis and juvenile xanthogranuloma. Notably, the histiocytic disorders have undergone significant modifications on their nomenclature in the basis of the molecular characteristics that are present in them. A summary of the most frequent cutaneous hematopoietic disorders in children will be discussed further in this review.
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Affiliation(s)
- Alejandro A Gru
- 1 Department of Pathology, University of Virginia, Charlottesville, Virginia
| | - Louis P Dehner
- 2 Lauren V. Ackerman Laboratory of Surgical Pathology, St. Louis Children's Hospital and Dermatopathology, Washington University Medical Center, St. Louis, Missouri
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Micosis fungoide en pacientes pediátricos: un reto diagnóstico. ACTAS DERMO-SIFILIOGRAFICAS 2017; 108:499. [DOI: 10.1016/j.ad.2017.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 02/23/2017] [Indexed: 11/20/2022] Open
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