Localized Depigmentation on Genital Melanosis: a Clue for the Understanding of Vitiligo
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Melanocytes and Their Diseases
Downloaded from http://perspectivesinmedicine.cshlp.org/ on October 2, 2021 - Published by Cold Spring Harbor Laboratory Press Melanocytes and Their Diseases Yuji Yamaguchi1 and Vincent J. Hearing2 1Medical, AbbVie GK, Mita, Tokyo 108-6302, Japan 2Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892 Correspondence: [email protected] Human melanocytes are distributed not only in the epidermis and in hair follicles but also in mucosa, cochlea (ear), iris (eye), and mesencephalon (brain) among other tissues. Melano- cytes, which are derived from the neural crest, are unique in that they produce eu-/pheo- melanin pigments in unique membrane-bound organelles termed melanosomes, which can be divided into four stages depending on their degree of maturation. Pigmentation production is determined by three distinct elements: enzymes involved in melanin synthesis, proteins required for melanosome structure, and proteins required for their trafficking and distribution. Many genes are involved in regulating pigmentation at various levels, and mutations in many of them cause pigmentary disorders, which can be classified into three types: hyperpigmen- tation (including melasma), hypopigmentation (including oculocutaneous albinism [OCA]), and mixed hyper-/hypopigmentation (including dyschromatosis symmetrica hereditaria). We briefly review vitiligo as a representative of an acquired hypopigmentation disorder. igments that determine human skin colors somes can be divided into four stages depend- Pinclude melanin, hemoglobin (red), hemo- ing on their degree of maturation. Early mela- siderin (brown), carotene (yellow), and bilin nosomes, especially stage I melanosomes, are (yellow). Among those, melanins play key roles similar to lysosomes whereas late melanosomes in determining human skin (and hair) pigmen- contain a structured matrix and highly dense tation. -
Melasma on the Nape of the Neck in a Man
Letters to the Editor 181 Melasma on the Nape of the Neck in a Man Ann A. Lonsdale-Eccles and J. A. A. Langtry Sunderland Royal Hospital, Kayll Road, Sunderland SR4 7TP, UK. E-mail: [email protected] Accepted July 19, 2004. Sir, sunlight and photosensitizing agents may be more We report a 47-year-old man with light brown macular relevant. pigmentation on the nape of his neck (Fig. 1). It was The differential diagnosis for pigmentation at this site asymptomatic and had developed gradually over 2 years. includes Riehl’s melanosis, Berloque dermatitis and He worked outdoors as a pipe fitter on an oilrig module; poikiloderma of Civatte. Riehl’s melanosis typically however, he denied exposure at this site because he involves the face with a brownish-grey pigmentation; always wore a shirt with a collar that covered the biopsy might be expected to show interface change and affected area. However, on further questioning it liquefaction basal cell degeneration with a moderate transpired that he spent most of the day with his head lymphohistiocytic infiltrate, melanophages and pigmen- bent forward. This reproducibly exposed the area of tary incontinence in the upper dermis. It is usually pigmentation with a sharp cut off inferiorly at the level associated with cosmetic use and may be considered of his collar. He used various shampoos, aftershaves and synonymous with pigmented allergic contact dermatitis shower gels, but none was applied directly to that area. of the face (6, 7). Berloque dermatitis is considered to be His skin was otherwise normal and there was no family caused by a photoirritant reaction to bergapentin; it history of abnormal pigmentation. -
Phacomatosis Spilorosea Versus Phacomatosis Melanorosea
Acta Dermatovenerologica 2021;30:27-30 Acta Dermatovenerol APA Alpina, Pannonica et Adriatica doi: 10.15570/actaapa.2021.6 Phacomatosis spilorosea versus phacomatosis melanorosea: a critical reappraisal of the worldwide literature with updated classification of phacomatosis pigmentovascularis Daniele Torchia1 ✉ 1Department of Dermatology, James Paget University Hospital, Gorleston-on-Sea, United Kingdom. Abstract Introduction: Phacomatosis pigmentovascularis is a term encompassing a group of disorders characterized by the coexistence of a segmental pigmented nevus of melanocytic origin and segmental capillary nevus. Over the past decades, confusion over the names and definitions of phacomatosis spilorosea, phacomatosis melanorosea, and their defining nevi, as well as of unclassifi- able phacomatosis pigmentovascularis cases, has led to several misplaced diagnoses in published cases. Methods: A systematic and critical review of the worldwide literature on phacomatosis spilorosea and phacomatosis melanorosea was carried out. Results: This study yielded 18 definite instances of phacomatosis spilorosea and 14 of phacomatosis melanorosea, with one and six previously unrecognized cases, respectively. Conclusions: Phacomatosis spilorosea predominantly involves the musculoskeletal system and can be complicated by neuro- logical manifestations. Phacomatosis melanorosea is sometimes associated with ancillary cutaneous lesions, displays a relevant association with vascular malformations of the brain, and in general appears to be a less severe syndrome. -
An Unusual Presentation of a Unilateral Asymptomatic Riehl's
ts & C por a e se R S l Michael, Med Rep Case Stud 2018, 3:1 t a u c d i i DOI: 10.4172/2572-5130.1000152 d e s e M + Medical Reports and Case Studies ISSN: 2572-5130 Case Report Open Access An Unusual Presentation of a Unilateral Asymptomatic Riehl’s Melanosis in a 45 Year Old Male Chan Kam Tim Michael* Department of Dermatology, Hong Kong Academy of Medicine, Hong Kong *Corresponding author: Chan Kam Tim Michael, Department of Dermatology, Hong Kong Academy of Medicine, Hong Kong, Tel: +85221282129; E-mail: [email protected] Received Date: Feb 12, 2018; Accepted Date: Mar 12, 2018; Published Date: Mar 21, 2018 Copyright: © 2018 Michael CKT. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Introduction but of post-inflammatory hyperpigmentation, Acquired unilateral Nevus (Hori’s Nevus), Riehl’s melanosis, Drug-induced Pigmented contact dermatitis (PCD), also known as Riehl’s hyperpigmentation, Lichenoid dermatitis; as well as Melasma and melanosis, is a rare facial hyperpigmentation usually secondary to Ochronosis. cosmetics. There are few documented reports in the literature, and many cases without proven diagnosis may have been treated with pigment lasers, especially in beauty parlour settings. We report a case referred from a private practitioner who has a special interest in dermatology. The patient was diagnosed subsequently as having Riehl’s melanosis and treated with non-tyrosinase inhibitor bleaching agents, sun avoidance and mandatory abstinence from over-the-counter cosmetic products. -
Poikiloderma of Civatte, Slapped Neck Solar Melanosis, Basal Melanin Stores
American Journal of Dermatology and Venereology 2019, 8(1): 8-13 DOI: 10.5923/j.ajdv.20190801.03 Slapped Neck Solar Melanosis: Is It a New Entity or a Variant of Poikiloderma of Civatte?? (Clinical and Histopathological Study) Khalifa E. Sharquie1,*, Adil A. Noaimi2, Ansam B. Kaftan3 1Department of Dermatology, College of Medicine, University of Baghdad 2Iraqi and Arab Board for Dermatology and Venereology, Dermatology Center, Medical City, Baghdad, Iraq 3Dermatology Center, Medical City, Baghdad, Iraq Abstract Background: Poikiloderma of Civatte although is a common complaint among population, especially European, still it was not reported in dark skin people as in Iraqi population. Objectives: To study all the clinical and histopathological features of Poikiloderma of Civatte in Iraqi population. Patients and Methods: This study is descriptive, clinical and histopathological study. It was carried out at the Dermatology Center, Medical City, Baghdad, Iraq, from September 2017 to October 2018. Thirty-one patients with Poikiloderma of Civatte were included and evaluated by history, physical examination, Wood’s light examination. Lesional skin biopsies were obtained from 9 patients, with histological examination of the sections stained with Hematoxylin and Eosin (H&E) and Fontana-Masson stain. Results: Thirty-one patients were included in this study, with mean age +/- SD was 53.32+/-10 years, and all patients were males. Twenty-six patients (84%) were with skin phenotype III&IV, The pigmentation was either mainly erythematous (22.5%), mainly dark brown pigmentation (29%), and mixed type of pigmentation (48.5%). These lesions were distributed on the sides of the neck and the face and the V shaped area of the chest. -
Pigmented Contact Dermatitis and Chemical Depigmentation
18_319_334* 05.11.2005 10:30 Uhr Seite 319 Chapter 18 Pigmented Contact Dermatitis 18 and Chemical Depigmentation Hideo Nakayama Contents ca, often occurs without showing any positive mani- 18.1 Hyperpigmentation Associated festations of dermatitis such as marked erythema, with Contact Dermatitis . 319 vesiculation, swelling, papules, rough skin or scaling. 18.1.1 Classification . 319 Therefore, patients may complain only of a pigmen- 18.1.2 Pigmented Contact Dermatitis . 320 tary disorder, even though the disease is entirely the 18.1.2.1 History and Causative Agents . 320 result of allergic contact dermatitis. Hyperpigmenta- 18.1.2.2 Differential Diagnosis . 323 tion caused by incontinentia pigmenti histologica 18.1.2.3 Prevention and Treatment . 323 has often been called a lichenoid reaction, since the 18.1.3 Pigmented Cosmetic Dermatitis . 324 presence of basal liquefaction degeneration, the ac- 18.1.3.1 Signs . 324 cumulation of melanin pigment, and the mononucle- 18.1.3.2 Causative Allergens . 325 ar cell infiltrate in the upper dermis are very similar 18.1.3.3 Treatment . 326 to the histopathological manifestations of lichen pla- 18.1.4 Purpuric Dermatitis . 328 nus. However, compared with typical lichen planus, 18.1.5 “Dirty Neck” of Atopic Eczema . 329 hyperkeratosis is usually milder, hypergranulosis 18.2 Depigmentation from Contact and saw-tooth-shape acanthosis are lacking, hyaline with Chemicals . 330 bodies are hardly seen, and the band-like massive in- 18.2.1 Mechanism of Leukoderma filtration with lymphocytes and histiocytes is lack- due to Chemicals . 330 ing. 18.2.2 Contact Leukoderma Caused Mainly by Contact Sensitization . -
Cutaneous Manifestation of Β‑Thalassemic Patients Mohamed A
[Downloaded free from http://www.mmj.eg.net on Thursday, January 14, 2021, IP: 156.204.184.20] Original article 267 Cutaneous manifestation of β‑thalassemic patients Mohamed A. Gaber, Marwa Galal Departement of Dermatology and Venereology, Objective Menoufia University, Menoufia, Egypt The aim was to study the prevalence of common dermatological problems in patients with Correspondence to Marwa Galal, MBBCh, β‑thalassemia major to help rapid treatment and prevent complications. Shiben Elkom, Menoufia, Background Egypt β‑Thalassemia major affects multiple organs and is associated with considerable morbidity Tel: +20 100 276 8385; Postal code: 32511; and mortality. In β‑thalassemia, a wide spectrum of skin diseases was identified, which were e‑mail: [email protected] caused by both the hemoglobin disorder and the complications of treatment. Patients and methods Received 07 August 2018 Revised 10 September 2018 This cross‑sectional study included 105 Egyptian patients (50 female individuals and 55 male Accepted 23 September 2018 individuals) with transfusion‑dependent β‑thalassemia major in the period spanning from June Published 25 March 2020 2017 to February 2018. The study was performed on child and adult patients of β‑thalassemia Menoufia Medical Journal 2020, 33:267–271 who presented to the hematology clinic, Menoufia University hospital. Skin examination of each patient was carried out, and any skin disease present was recorded. Results The main skin disorders that were noticed in decreasing order of frequency were pruritus (34.4%), xerosis (24.8%), urticaria (21.1%), freckles (17.1%), tinea infections (11.6%), pitriasis alba reported in 10.5%, scars (10.5%), hypersensitivity to deferoxamine pump (9.5%), herpes simplex (9.5%), acne vulgaris (8.6%), miliaria (6.7%), contact dermatitis (4.8%). -
SKIN HYPERPIGMENTATION DISORDERS and USE of HERBAL EXTRACTS: a REVIEW Priyam Goswami* and H
Current Trends in Pharmaceutical Research 2020 Vol 7 Issue 2 © Dibrugarh University www.dibru.ac.in/ctpr ISSN: 2319-4820 (Print) 2582-4783 (Online) Mini Review SKIN HYPERPIGMENTATION DISORDERS AND USE OF HERBAL EXTRACTS: A REVIEW Priyam Goswami* and H. K. Sharma Department of Pharmaceutical Sciences, Faculty of Science and Engineering, Dibrugarh University Abstract Background: Problems pertaining to the skin pigmentation is one of the major concerns that affect the quality of life of human beings especially women. The disturbances in the melanin production mainly results in skin pigmentation disorders. For centuries natural ingredients have been used in the treatment of skin hyperpigmentation disorders. Since synthetic cosmetic ingredients can have potential side effects, emphasis has been given on the herbal products, which are considered to be mild and biodegradable, exhibiting low toxicity. Objective: The objective of this review is to provide a brief understanding about the skin hyperpigmentation disorders and the use of various herbal extracts as a notable approach for its treatment. Methods: A narrative literature review was conducted with the extraction of information, which was analyzed from various databases viz. Google scholar, Science Direct, PubMed, Wiley Online Library etc., Results and Discussions: The preferences of the people for the use of herbal skin- lightening agents over the synthetic ones have gained wide spread popularity. Potentially active compounds that have been extracted from the plants have been identified which provide scope for its use a novel depigmenting agent. The improvement in the efficacy of the herbal extracts is mainly due to synergism, and hence this property yields great results when used in cosmetic formulations. -
Clinical Profile of Children with Pigmentary Disorders Accepted: 08-12-2019
International Journal of Dermatology, Venereology and Leprosy Sciences. 2020; 3(1): 08-13 E-ISSN: 2664-942X P-ISSN: 2664-9411 Original Article www.dermatologypaper.com/ Derma 2020; 3(1): 08-13 Received: 06-11-2019 Clinical profile of children with pigmentary disorders Accepted: 08-12-2019 Dr. Sori Tukaram Dr. Sori Tukaram, Dr. Dyavannavar Veeresh V, Dr. TJ Jaisankar and Assistant Professor, Department of Skin & STD, Dr. Thappa DM GIMS, Gadag, Karnataka, India DOI: https://doi.org/10.33545/26649411.2020.v3.i1a.31 Dr. Dyavannavar Veeresh V Abstract Associate Professor, Pigmentary disorders are believed to be the commonest group of dermatoses in pediatric age group [6]. Department of Skin & STD, but, there is a dearth of adequate data regarding the frequency and pattern of different types of GIMS, Gadag, Karnataka, India pigmentary disorders in children. Any deviation from the normal pattern of pigmentation results in significant concerns in the affected individual. Even, relatively minor pathologic pigmentary changes Dr. TJ Jaisankar can cause children to become pariahs in their community. This study was a descriptive study spanning Professor, Department of Skin over a period of 23 months. Institute ethics committee clearance was obtained. All children attending & STD, GIMS, JIPMER, the Dermatology out Patient Department (OPD) (6 days in a week) were screened for any cutaneous Pondicherry, India pigmentary lesions. Children (up to 14 years of age) with pigmentary disorders were included in the study after getting informed consent from the parents/ guardians. Out of 167 children, 53 (31.7%) had Dr. Thappa DM hyperpigmentation lesions only, whereas 108 (64.7%) had hypopigmentary lesions only. -
Overview of Skin Whitening Agents: Drugs and Cosmetic Products
cosmetics Review Overview of Skin Whitening Agents: Drugs and Cosmetic Products Céline Couteau and Laurence Coiffard * Faculty of Pharmacy, Université de Nantes, Nantes Atlantique Universités, LPiC, MMS, EA2160, 9 rue Bias, Nantes F-44000, France; [email protected] * Correspondence: [email protected]; Tel.: +33-253484317 Academic Editor: Enzo Berardesca Received: 30 March 2016; Accepted: 13 July 2016; Published: 25 July 2016 Abstract: Depigmentation and skin lightening products, which have been in use for ages in Asian countries where skin whiteness is a major esthetic criterion, are now also highly valued by Western populations, who expose themselves excessively to the sun and develop skin spots as a consequence. After discussing the various possible mechanisms of depigmentation, the different molecules that can be used as well as the status of the products containing them will now be presented. Hydroquinone and derivatives thereof, retinoids, alpha- and beta-hydroxy acids, ascorbic acid, divalent ion chelators, kojic acid, azelaic acid, as well as diverse herbal extracts are described in terms of their efficacy and safety. Since a genuine effect (without toxic effects) is difficult to obtain, prevention by using sunscreen products is always preferable. Keywords: depigmenting agents; safety; efficacy 1. Introduction The allure of a pale complexion is nothing new and many doctors have been looking into this subject for some time, proposing diverse and varied recipes for eliminating all unsightly marks (freckles and liver spots were clearly targeted). Pliny the Elder (Naturalis Historia), Dioscoride (De Universa medicina), Castore Durante (Herbario nuove), and other authors from other time periods have addressed this issue. -
Congenital Horner Syndrome with Heterochromia Iridis Associated with Ipsilateral Internal Carotid Artery Hypoplasia
CASE REPORT Print ISSN 1738-6586 / On-line ISSN 2005-5013 J Clin Neurol 2014 Open Access Congenital Horner Syndrome with Heterochromia Iridis Associated with Ipsilateral Internal Carotid Artery Hypoplasia Fabrice C. Deprez,a Julie Coulier,b Denis Rommel,a Antonella Boschib aDepartments of Radiology and bOphthalmology, Cliniques Universitaires Saint-Luc, UCL, Brussels, Belgium BackgroundzzHorner syndrome (HS), also known as Claude-Bernard-Horner syndrome or Received August 5, 2013 oculosympathetic palsy, comprises ipsilateral ptosis, miosis, and facial anhidrosis. Revised April 15, 2014 Accepted April 21, 2014 Case ReportzzWe report herein the case of a 67-year-old man who presented with congenital HS associated with ipsilateral hypoplasia of the internal carotid artery (ICA), as revealed by Correspondence heterochromia iridis and confirmed by computed tomography (CT). Fabrice C. Deprez, MD Department of Radiology, ConclusionszzCT evaluation of the skull base is essential to establish this diagnosis and dis- Cliniques Universitaires Saint-Luc, tinguish aplasia from agenesis/hypoplasia (by the absence or hypoplasia of the carotid canal) or UCL, Avenue Hippocrate 10, from acquired ICA obstruction as demonstrated by angiographic CT. 1200 Woluwe-Saint-Lambert, J Clin Neurol 2014 Belgium Tel +32.472.93.34.80 Key Wordszzcongenital horner syndrome, internal carotid artery agenesis, Fax +32.81.42.35.05 heterochromia iridis, computed tomography. E-mail [email protected] Introduction spindly left ICA, which was misinterpreted as ICA thrombosis (Fig. 1). The left anterior cerebral artery and MCA were sup- Horner syndrome (HS), also known as Claude-Bernard-Horn- plied by a large posterior communicating artery from the bas- er syndrome or oculosympathetic palsy, comprises ipsilateral ilar artery. -
Clinico-Epidemiologic Features of Oculocutaneous Albinism in Northeast Section of Cairo – Egypt
The Egyptian Journal of Medical Human Genetics (2010) 11, 167–172 Ain Shams University The Egyptian Journal of Medical Human Genetics www.ejmhg.eg.net www.sciencedirect.com ORIGINAL ARTICLE Clinico-epidemiologic features of oculocutaneous albinism in northeast section of Cairo – Egypt Alaaeldin F. Mohamed a, Nermine S. El-Sayed a,*, Neveen S. Seifeldin b a Medical Genetics Center, Ain Shams University, Egypt b Dermatology Department, Ain Shams University, Egypt Received 30 January 2010; accepted 30 March 2010 KEYWORDS Abstract Background: Oculocutaneous albinism (OCA) is a genetically heterogeneous group of OCA; disorders characterized by the absence or reduced pigmentation of the skin, hair and eyes. To assess Hermansky–Pudlac; the clinico-epidemiologic features of different forms of OCA among Egyptian patients, we per- Chediac Higashi; formed a retrospective study to determine the frequency, types, clinical presentation and associated Cross syndrome; genomic errors in albino patients and their relatives consulting the Genetics Clinic, Pediatric Hos- Vision; pital, Ain Shams University, Cairo, Egypt. Genes; Methods: We used the outpatients index files to identify diagnosed cases of albinism referred from Egypt the dermatologic and ophthalmologic departments with different genodermatoses over 43 year per- iod. We used specifically designed data collection protocol forms to extract epidemiological and clinical data from the patients medical records. These were entered into a computer database and analyzed using standard statistical software. Results: The occurrence rate of albinism in our study was 20.4% of genodermatoses patients and 1 per 5843 patients attending the Pediatric hospital. Consanguineous marriage was reported among parents of 66.37% of patients and positive family history was reported in 46.01% of patients.