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Bleakley A, Betts G, Sainuddin S, Hilditch C. Diffuse scalp neurofibromas: Case series and Clinicoradiological characteristics of a rare vascular lesion. Interv Neuroradiol 2024:15910199241267301. [PMID: 39094573 DOI: 10.1177/15910199241267301] [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: 08/04/2024] Open
Abstract
Diffuse neurofibroma of the head and neck are rare tumours which have unique clinical and radiological findings. Presurgical diagnosis is important as these lesions are usually highly vascular and pre-operative embolisation can reduce the risk of intra-operative haemorrhage. In this article we describe four cases; two which underwent pre-operative embolisation, which should aid the reader in successfully diagnosing this entity before biopsy/surgery.
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Affiliation(s)
- Aaron Bleakley
- Royal Salford Hospital Manchester Centre for Clinical Neurosciences, UK
| | - Guy Betts
- Manchester University NHS Foundation Trust, UK
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Budair FM. KIT Mutation Associated with Depigmented Patches Regression and Multiple Café-au-lait Macules Development in a Patient with Piebaldism: A Case Report. Clin Cosmet Investig Dermatol 2024; 17:713-716. [PMID: 38524391 PMCID: PMC10961011 DOI: 10.2147/ccid.s449691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 03/03/2024] [Indexed: 03/26/2024]
Abstract
Piebaldism is a rare genetic disorder caused by KIT mutations and clinically characterized by fixed depigmented patches throughout the body. Herein, a case of piebaldism in which the depigmented patches regressed as the patient grew older, along with the development of multiple café-au-lait macules, is described. The likely pathogenic, heterozygous KIT c.1991-2A>G variant was detected as the potential cause of this unusual piebaldism phenotype. This case provides new knowledge on genotype-phenotype correlation of KIT mutations for piebaldism etiology and presentation.
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Affiliation(s)
- Fatimah Mohammad Budair
- Department of Dermatology, King Fahd University Hospital, Al Khobar, College of Medicine, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
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Li X, Xing X, Liang X, Song C, Yang J, Ren D, Zhou Y. Piebaldism with café-au-lait macules resulting from a novel mutation of KIT gene in a three-generation Chinese family. Skin Res Technol 2023; 29:e13352. [PMID: 37357653 PMCID: PMC10209842 DOI: 10.1111/srt.13352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 05/04/2023] [Indexed: 06/27/2023]
Abstract
BACKGROUND Piebaldism is a rare, autosomal dominant, and congenital pigmentary disorder characterized by stable depigmentation of the skin and white forelock. Mutations in KIT or SLUG genes result in piebaldism. Most individuals with piebaldism have a family history of the disorder. METHODS In this paper, we report a case of piebaldism with café-au-lait macules resulting from a novel mutation of KIT gene c.1982C > T (p.Thr661Ile) in a three-generation Chinese family. The whole-exome sequencing, mitochondrial gene 3000X, and bioinformatics tools were used to identify the mutation in this new-found pedigree. In addition, we searched the databases of "Punmed, Chinese National Knowledge Infrastructure, CMJD, WANFANG MED ONLINE", reviewed 88 cases of piebaldism caused by KIT gene mutation, and summarized the relationship between clinical phenotype and genotype of piebaldism through logistic regression and other statistical methods. RESULTS The proband and her affected mother carried a heterozygous c.1982C > T missense mutation (p.Thr661Ile) on KIT gene. Bioinformatics analysis hinted that it had potential pathogenicity. The data showed that piebaldism patients with cafè-au-lait macules had KIT mutations almost located in the intracellular tyrosine kinase domain and were mostly related to the severe clinical phenotype of piebaldism. CONCLUSION The new heterozygous c.1982C > T missense mutation on KIT caused piebaldism with café-au-lait macules in this Chinese family. This study provides a new reference index for clinicians to judge the severity of clinical phenotypes of piebaldism, broadens the understanding of the correlation between clinical phenotypes and genotypes of piebaldism, and provides reference of genetic counseling and prenatal diagnosis for affected families.
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Affiliation(s)
- Xiaorong Li
- Department of DermatologyThe First Medical Center of Chinese PLA General HospitalBeijingChina
| | - Xiaojing Xing
- Department of DermatologyBeijing Shijitan HospitalCapital Medical UniversityBeijingChina
| | - Xiaoqiang Liang
- Department of DermatologyThe First Medical Center of Chinese PLA General HospitalBeijingChina
| | - Cuihao Song
- Department of DermatologyThe First Medical Center of Chinese PLA General HospitalBeijingChina
| | - Jie Yang
- Department of DermatologyAffiliated Hospital of North China University of Science and TechnologyTangshanChina
| | - Dan Ren
- Department of DermatologyThe First Medical Center of Chinese PLA General HospitalBeijingChina
| | - Yong Zhou
- Department of DermatologyThe First Medical Center of Chinese PLA General HospitalBeijingChina
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Hegde S, Srinivas S, Nanjundappa N. KIT gene mutation causing piebaldism associated with multiple Café Au-Lait like macules and freckling: Delineating a cause of this coexistence. Indian Dermatol Online J 2023; 14:240-244. [PMID: 37089832 PMCID: PMC10115335 DOI: 10.4103/idoj.idoj_368_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/12/2022] [Accepted: 08/12/2022] [Indexed: 03/12/2023] Open
Abstract
Piebaldism is a rare genetic disorder of congenital leukoderma caused by mutation in KIT proto-oncogene receptor tyrosine kinase. We present a 10-year-old boy with congenital depigmented macules suggestive of piebaldism associated with café au lait macules and skin fold freckling complicating the diagnosis. A diagnosis of piebaldism was made via exome sequencing that showed a pathogenic variant of KIT gene with no pathogenic variants of NF1 or SPRED1 gene. Our current understanding of the KIT tyrosine kinase function may provide a better explanation into this phenotypic coexistence and does not necessarily represent an overlap with Neurofibromatosis type 1.
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Wang C, Zhang Y, Hu X, Wang L, Xu Z, Xing H. Novel pathogenic variants in KIT gene in three Chinese piebaldism patients. Front Med (Lausanne) 2022; 9:1040747. [DOI: 10.3389/fmed.2022.1040747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 10/17/2022] [Indexed: 11/11/2022] Open
Abstract
BackgroundPiebaldism is a rare autosomal dominant disease, and roughly 75% patients had KIT gene mutations. Up to date, approximately 90 KIT mutations causing piebaldism were reported.MethodsTo identify KIT gene mutations in three pediatric piebaldism patients from different families and explore the genotype-phenotype correlation, peripheral blood DNA were collected from probands and their parents. Whole-exome sequencing was performed to detect potential disease-causing variants in the three probands. Putative variants were validated by Sanger sequencing.ResultsHeterozygous variants of c.2469_2484del (p.Tyr823*), c.1994G > C (p.Pro665Leu), and c.1982_1983insCAT (p.662_663insIle) in KIT gene were detected in three probands. These variants were all novel and classified as pathogenic/likely pathogenic variants according to the interpretation guidelines of American College of Medical Genetics and Genomics and the Association for Molecular Pathology. The probands carrying variants located in tyrosine kinase domain exhibited a more severe phenotype.ConclusionThe piebaldism in three families was caused by novel heterozygous KIT variants. The severity of phenotypes is related with the types and locations of different mutations. Our results further provided evidence for genetic counseling for the three families.
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Albaghdadi M, Thibodeau ML, Lara-Corrales I. Updated Approach to Patients with Multiple Café au Lait Macules. Dermatol Clin 2021; 40:9-23. [PMID: 34799039 DOI: 10.1016/j.det.2021.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Café au lait macules (CALMs) are a normal and frequent finding in the general population, but multiple CALMs raise the possibility of an underlying neurocutaneous disease like neurofibromatosis type I. Certain features of CALMs like number, size, shape, and distribution are important in identifying children at higher risk of having a neurocutaneous disorder or another genetic disorder. Genetic testing can be especially helpful in establishing a diagnosis in atypical presentations, or when the child is young and other features of the disease aside from CALMs have not manifested.
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Affiliation(s)
| | - My Linh Thibodeau
- Division of Clinical and Metabolic Genetics, Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Irene Lara-Corrales
- Pediatric Dermatology, Division of Dermatology, Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, Ontario M5G1X8, Canada.
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Zhang R, Zhang Y, Lu X, Xu W, Wang H, Mo W, Pang H, Tang R, Li S, Yan X, Li Y. SPRED1 Is Downregulated and a Prognostic Biomarker in Adult Acute Myeloid Leukemia. Front Oncol 2020; 10:204. [PMID: 32175275 PMCID: PMC7056905 DOI: 10.3389/fonc.2020.00204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 02/06/2020] [Indexed: 11/13/2022] Open
Abstract
We report herein that Sprouty-Related EVH1 Domain-Containing Protein1 (SPRED1) is downregulated and a prognostic biomarker in adult acute myeloid leukemia (AML). We determined mRNA levels of SPRED1 in the bone marrow mononuclear cells from adult patients, including 113 AMLs and 22 acute lymphoblastic leukemias (ALLs), as well as in 37 healthy control subjects. Significantly decreased SPRED1 mRNA expression was found in AML patients comparing to those in ALL patients and healthy controls, which was confirmed by immunocytochemistry analysis of SPRED1 protein and ELISA measurement of serum SPRED1 level. Further analysis demonstrated that SPRED1 expression was significantly higher for most patients at complete remission after induction treatment than at diagnosis. Moreover, SPRED1 expression was significantly downregulated in M2 and M3 types. Non-acute promyelocytic leukemia (non-APL) patients with decreased SPRED1 had significantly lower 2-year progression-free survival and event-free survival rates. In vitro, ectopic overexpression of SPRED1 leads to a decrease of extracellular signal-regulated kinase (ERK) phosphorylation, induction of apoptosis and reduction of proliferation of THP-1 cells. Our findings suggest SPRED1 is not only a predictor of treatment response, but also an independent prognostic factor for non-APL, and targeting Ras- Mitogen-activated protein kinase (MAPK) signaling may be a promising strategy for the treatment of AML with downregulation of SPRED1.
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Affiliation(s)
- Rui Zhang
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Yan Zhang
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Xianglan Lu
- Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Weihong Xu
- Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - He Wang
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Wenbin Mo
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Hui Pang
- Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Rurong Tang
- Department of Anesthesiology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Shibo Li
- Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Xiaojing Yan
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Yan Li
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, China
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Abstract
The key diagnostic tool for hyperpigmentation is histopathology, which may be accompanied by certain laboratory tests. Hyperpigmentation may result from excess melanin (hypermelanosis), cutaneous iron deposits (hemosiderosis), cutaneous carotene deposits (carotenoderma), or cutaneous deposits of a substance not normally found in the skin (dyschromia). The different types of hypermelanosis may be classified as either localised or generalised. The former generally correspond to skin tumours and may form a cutaneous expression of complex syndromes, which most notably include cardiac abnormalities, or to pigmented forms of inflammatory and/or infectious dermatoses. Diffuse hypermelanosis is frequently a sign of systemic disease, generally metabolic or endocrine disease, or else it may result from pharmaceutical therapy. Herein we review the various causes of hyperpigmentation and the corresponding therapy.
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Akarsu S, İlknur T, Avcı C, Fetil E. Piebaldism Associated with Café-au-lait Macules and Intertriginous Freckling: A Case Report and Review of the Literature. Ann Dermatol 2019; 31:567-570. [PMID: 33911651 PMCID: PMC7992560 DOI: 10.5021/ad.2019.31.5.567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/16/2018] [Accepted: 09/18/2018] [Indexed: 11/10/2022] Open
Abstract
We present 9-year-old fraternal twins from a family with piebaldism, having congenital depigmented macules and meeting the diagnostic criteria for neurofibromatosis type 1 (NF1) due to the multiple café-au-lait macules (CALMs) and intertriginous freckling at the same time. It's still a debatable issue that CALMs and intertriginous freckling may be seen in the clinical spectrum of piebaldism or these patients should be regarded as coexistence of piebaldism and NF1. However, based on recent literature and our patients' findings, we suggest that this rare phenotypic variant of piebaldism may not need the careful clinical follow-up and molecular testing for NF1. Besides, it may be suitable that these individuals with piebaldism showing NF1-like clinical phenotypes should be further tested for KIT and SPRED1 gene mutations.
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Affiliation(s)
- Sevgi Akarsu
- Department of Dermatology, Dokuz Eylul University, Faculty of Medicine, İzmır, Turkey
| | - Turna İlknur
- Department of Dermatology, Dokuz Eylul University, Faculty of Medicine, İzmır, Turkey
| | - Ceylan Avcı
- Department of Dermatology, Bilecik State Hospital, Bilecik, Turkey
| | - Emel Fetil
- Department of Dermatology, Dokuz Eylul University, Faculty of Medicine, İzmır, Turkey
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10
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Nagaputra JC, Koh MJA, Brett M, Lim ECP, Lim HW, Tan EC. Piebaldism with multiple café-au-lait-like hyperpigmented macules and inguinal freckling caused by a novel KIT mutation. JAAD Case Rep 2018; 4:318-321. [PMID: 29693058 PMCID: PMC5911795 DOI: 10.1016/j.jdcr.2017.10.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Affiliation(s)
| | - Mark J A Koh
- Dermatology Service, KK Women's & Children's Hospital, Singapore.,Paediatrics Academic Clinical Programme, SingHealth Duke-NUS Medical School, Singapore
| | - Maggie Brett
- Research Laboratory, KK Women's & Children's Hospital, Singapore
| | - Eileen C P Lim
- Research Laboratory, KK Women's & Children's Hospital, Singapore
| | - Hwee-Woon Lim
- Research Laboratory, KK Women's & Children's Hospital, Singapore
| | - Ene-Choo Tan
- Paediatrics Academic Clinical Programme, SingHealth Duke-NUS Medical School, Singapore.,Research Laboratory, KK Women's & Children's Hospital, Singapore
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Gupta D, Chandrashekar L, Larizza L, Colombo EA, Fontana L, Gervasini C, Thappa DM, Rajappa M, Rajendiran KS, Sreenath GS, Kate V. Familial gastrointestinal stromal tumors, lentigines, and café-au-lait macules associated with germline c-kit mutation treated with imatinib. Int J Dermatol 2017; 56:195-201. [PMID: 28074523 DOI: 10.1111/ijd.13516] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 08/10/2016] [Accepted: 10/19/2016] [Indexed: 12/17/2022]
Abstract
BACKGROUND Familial lentiginosis syndromes are characterized by a wide array of manifestations resulting from activation of molecular pathways which control growth, proliferation, and differentiation of a broad range of tissues. Familial gastrointestinal stromal tumors (GISTs) are often accompanied by additional features like hyperpigmentation, mastocytosis, and dysphagia. They have been described with mutations in c-kit (most commonly), platelet-derived growth factor receptor A, neurofibromatosis-1, and succinate dehydrogenase genes. MATERIALS AND METHODS We report on molecular characterization and tumor histopathology of two siblings in whom lentigines and café-au-lait macules were present along with multifocal GIST. Immuhistochemical analysis of CD34 and CD117 was performed on GIST biopsy samples from both siblings, while c-kit mutational analysis was done by PCR and direct sequencing on DNA from peripheral blood leukocytes of all family members and from paraffin-embedded gastric biopsy specimens of affected siblings. RESULTS Histopathology revealed positive expression of CD117 and CD34. Mutational analysis showed the germline c.1676T>C mutation in c-kit exon 11, (p.(Val559Ala)), in the peripheral blood of both siblings and a second exon 11 mutation, c.1669T>A (p.(Trp557Arg)) in the tumor biopsy of one of them. Initiation of imatinib treatment resulted in striking resolution of their hyperpigmentation and a stable gastrointestinal disease in one of them. CONCLUSIONS A c-kit mutational test in familial GISTs is indicated before initiation of imatinib therapy, as it can help predict tumor response to treatment.
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Affiliation(s)
- Divya Gupta
- Department of Dermatology and STD, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Laxmisha Chandrashekar
- Department of Dermatology and STD, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Lidia Larizza
- Department of Health Sciences, Medical Genetics, Università degli Studi di Milano, Milano, Italy.,Laboratory of Medical Cytogenetics and Molecular Genetics, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | - Elisa A Colombo
- Department of Health Sciences, Medical Genetics, Università degli Studi di Milano, Milano, Italy
| | - Laura Fontana
- Department of Health Sciences, Medical Genetics, Università degli Studi di Milano, Milano, Italy
| | - Cristina Gervasini
- Department of Health Sciences, Medical Genetics, Università degli Studi di Milano, Milano, Italy
| | - Devinder M Thappa
- Department of Dermatology and STD, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Medha Rajappa
- Department of Biochemistry, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Kalai Selvi Rajendiran
- Department of Biochemistry, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Gubbi Shamanna Sreenath
- Department of Surgery, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
| | - Vikram Kate
- Department of Surgery, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Puducherry, India
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Zhang J, Li M, Yao Z. Molecular screening strategies for NF1-like syndromes with café-au-lait macules (Review). Mol Med Rep 2016; 14:4023-4029. [PMID: 27666661 PMCID: PMC5112360 DOI: 10.3892/mmr.2016.5760] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 04/26/2016] [Indexed: 12/28/2022] Open
Abstract
Multiple café-au-lait macules (CALM) are usually associated with neurofibromatosis type 1 (NF1), one of the most common hereditary disorders. However, a group of genetic disorders presenting with CALM have mutations that are involved in human skin pigmentation regulation signaling pathways, including KIT ligand/KIT proto‑oncogene receptor tyrosine kinase and Ras/mitogen‑activated protein kinase. These disorders, which include Legius syndrome, Noonan syndrome with multiple lentigines or LEOPARD syndrome, and familial progressive hyperpigmentation) are difficult to distinguish from NF1 at early stages, using skin appearance alone. Furthermore, certain syndromes are clinically overlapping and molecular testing is a vital diagnostic method. The present review aims to provide an overview of these 'NF1‑like' inherited diseases and recommend a cost‑effective strategy for making a clear diagnosis among these diseases with an ambiguous borderline.
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Affiliation(s)
- Jia Zhang
- Department of Dermatology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, P.R. China
| | - Ming Li
- Department of Dermatology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, P.R. China
| | - Zhirong Yao
- Department of Dermatology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, P.R. China
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Hernández-Martín A, Duat-Rodríguez A. An Update on Neurofibromatosis Type 1: Not Just Café-au-Lait Spots, Freckling, and Neurofibromas. An Update. Part I. Dermatological Clinical Criteria Diagnostic of the Disease. ACTAS DERMO-SIFILIOGRAFICAS 2016. [DOI: 10.1016/j.adengl.2016.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Hernández-Martín A, Duat-Rodríguez A. An Update on Neurofibromatosis Type 1: Not Just Café-au-Lait Spots, Freckling, and Neurofibromas. An Update. Part I. Dermatological Clinical Criteria Diagnostic of the Disease. ACTAS DERMO-SIFILIOGRAFICAS 2016; 107:454-64. [PMID: 26979265 DOI: 10.1016/j.ad.2016.01.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 01/07/2016] [Accepted: 01/17/2016] [Indexed: 01/10/2023] Open
Abstract
Neurofibromatosis type 1 (NF1) is the most common neurocutaneous syndrome and probably the one best known to dermatologists, who are generally the first physicians to suspect its diagnosis. Although the genetic locus of NF1 was identified on chromosome 17 in 1987, diagnosis of the disease is still mainly based on clinical observations and the diagnostic criteria of the National Institute of Health, dating from 1988. Cutaneous manifestations are particularly important because café-au-lait spots, freckling on flexural areas, and cutaneous neurofibromas comprise 3 of the 7 clinical diagnostic criteria. However, café-au-lait spots and freckling can also be present in other diseases. These manifestations are therefore not pathognomonic and are insufficient for definitive diagnosis in the early years of life. NF1 is a multisystemic disease associated with a predisposition to cancer. A multidisciplinary follow-up is necessary and dermatologists play an important role.
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Affiliation(s)
- A Hernández-Martín
- Servicio de Dermatología, Hospital Infantil del Niño Jesús, Madrid, España.
| | - A Duat-Rodríguez
- Servicio de Neurología, Hospital Infantil del Niño Jesús, Madrid, España
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Jia WX, Xiao XM, Wu JB, Ma YP, Ge YP, Li Q, Mao QX, Li CR. A novel missense KIT mutation causing piebaldism in one Chinese family associated with café-au-lait macules and intertriginous freckling. Ther Clin Risk Manag 2015; 11:635-8. [PMID: 25960657 PMCID: PMC4410829 DOI: 10.2147/tcrm.s75544] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Piebaldism is a rare autosomal dominant genodermatosis, manifesting as congenital and stable depigmentation of the skin and white forelock. It has been found to be associated with mutations in the KIT or SLUG genes. We report a Chinese piebaldism family including a 28-year-old woman and her 3-year-old son with characteristics of white patches and forelock associated with numerous brown macules and patches. Genomic DNA samples of the proband and her son were extracted from their peripheral blood. One hundred unrelated healthy individuals were used as controls. All coding regions of KIT, SLUG, and NF1 genes were amplified by polymerase chain reaction using exon flanking intronic primers and Sanger sequencings were performed. DNA sequencing revealed heterozygous missense c.2431T>G mutation in exon 17 of the KIT gene in the proband and the affected son. No potentially pathogenic variant was identified in SLUG or NF1 genes. The nucleotide substitution was not found in 100 unrelated control individuals. This study reveals a novel KIT mutation in piebaldism, and it further supports that café-au-lait macules and intertriginous freckling of piebaldism are parts of pigmented anomaly in piebaldism, which does not necessarily represent coexistence of neurofibromatosis type 1 (NF1).
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Affiliation(s)
- Wei-Xue Jia
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China ; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, Jiangsu, China
| | - Xue-Min Xiao
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China ; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, Jiangsu, China
| | - Jian-Bing Wu
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China ; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, Jiangsu, China
| | - Yi-Ping Ma
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China ; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, Jiangsu, China
| | - Yi-Ping Ge
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China ; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, Jiangsu, China
| | - Qi Li
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China ; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, Jiangsu, China
| | - Qiu-Xia Mao
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China ; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, Jiangsu, China
| | - Cheng-Rang Li
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China ; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, Jiangsu, China
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Sleiman R, Kurban M, Succaria F, Abbas O. Poliosis circumscripta: Overview and underlying causes. J Am Acad Dermatol 2013; 69:625-33. [DOI: 10.1016/j.jaad.2013.05.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 05/07/2013] [Accepted: 05/10/2013] [Indexed: 11/30/2022]
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