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Irregular skin pigmentation

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https://www.readbyqxmd.com/read/29314288/the-limitations-of-dermoscopy-false-positive-and-false-negative-tumors
#1
REVIEW
V Papageorgiou, Z Apalla, E Sotiriou, C Papageorgiou, E Lazaridou, S Vakirlis, D Ioannides, A Lallas
Dermoscopy has been documented to increase the diagnostic accuracy of clinicians evaluating skin tumors, improving their ability to detect skin cancer and better recognize benign moles. However, dermoscopically "false positive" and "false negative" tumors do exist. False positive diagnosis usually leads to unnecessary excisions. False negative diagnosis is much more dangerous, since it might result in overlooking a cancer, with severe undesirable consequences for the patient and the physician. Therefore, management strategies should mainly focus on addressing the risk of dermoscopically false negative tumors...
January 5, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29275159/anti-photoaging-effects-of-chitosan-oligosaccharide-in-ultraviolet-irradiated-hairless-mouse-skin
#2
Song-Zhi Kong, Dong-Dong Li, Hui Luo, Wen-Jie Li, Yong-Mei Huang, Ji-Cheng Li, Zhang Hu, Na Huang, Min-Hui Guo, Yao Chen, Si-Dong Li
Skin photoaging (SP) is a premature skin-aging damage after repeated exposure to ultraviolet (UV) radiation, mainly characterized by oxidative stress and inflammatory disequilibrium, which makes skin show the typical symptoms of photoaging such as coarse wrinkling, dryness, irregular pigmentation and laxity. Chitosan oligosaccharide (COS), a natural polysaccharide with good humectant property, is the depolymerized product of chitosan with various biological activities, among which the antioxidant and anti-inflammatory effects have been frequently reported in recent years...
December 21, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29235153/acral-melanoma-foot-lesions-part-2-clinical-presentation-diagnosis-and-management
#3
REVIEW
A Desai, R Ugorji, A Khachemoune
Acral melanoma (AM) is a rare subtype of cutaneous malignant melanoma found on acral skin, primarily on the soles of the feet. Although rare, it is the most common subtype of melanoma found in patients of African or Asian ethnicity and has a poor prognosis, often because of the more advanced stage of presentation at diagnosis. In the second of this two-part series, we review the clinical presentation, histopathology, diagnosis and management of AM. Clinically, AM presents as a variegated lesion with blue-black pigment and irregular borders on acral skin...
December 13, 2017: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/29178539/non-melanoma-hutchinson-s-sign-a-reappraisal-of-this-important-remarkable-melanoma-simulant
#4
L Robert Baran, Beth S Ruben, Paul Kechijian, Luc Thomas
BACKGROUND: More than 20 years ago our reappraisal of the Hutchinson Sign (HS) gave birth to the concept of the Pseudo-Hutchinson sign. OBJECTIVES: We have found it interesting to emphasize some important histologic points and to expand the list of the numerous HS simulants. METHODS: We have examined the cutaneous samples taken from the pigmented skin of patients in association with nail matrix biopsy. We have also extended the long list of non-melanoma HS...
November 24, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29177151/blue-white-veil-as-novel-dermatoscopic-feature-in-discoid-lupus-erythematosus-in-2-african-american-patients
#5
Jessica Cervantes, Farhaan Hafeez, Mariya Miteva
Dermoscopic features of discoid lupus erythematosus (DLE) depend on the stage of the lesions: active lesions include yellow-brown dots and red dots, whereas longstanding inactive lesions show absence of follicular openings, cicatricial milky red or white patches, structureless white and brown areas, and thick arborizing vessels. Loss of pinpoint white dots, blue-gray dots in a speckled pattern, and a peripheral pigmented network have been described on dermoscopy of DLE in dark skin. We report a blue-white veil as a novel dermoscopic feature in 2 cases of biopsy-proven DLE in African-American patients...
October 2017: Skin Appendage Disorders
https://www.readbyqxmd.com/read/29133658/role-of-amniotic-membrane-and-full-thickness-skin-graft-in-reconstruction-of-kissing-nevus-of-eyelids
#6
Manpreet Singh, Natasha Gautam, Manpreet Kaur, Zoramthara Zadeng
A 20-year-old girl presented with a large pigmented lesion over the temporal aspect of left lateral canthus involving the lateral one-third of both eyelids, since birth. A slow increase in its size had been noticed for the past 2 years. On examination, a hairy nevus measuring 34 mm × 22 mm was noticed involving left eyelid skin, the mucocutaneous junction (MCJ), palpebral conjunctiva, and lateral canthus. The surface was irregularly thick and covered with long, thick, and pigmented hairs. A clinical diagnosis of kissing nevus of eyelids was kept and a surgical resection with reconstruction planned...
November 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29125708/integration-of-dermoscopy-and-reflectance-confocal-microscopy-for-distinguishing-melanomas-from-nevi-of-the-breast-area
#7
V D Mandel, C Bombonato, R Pampena, A Kyrgidis, S Borsari, E Benati, M Mirra, S Piana, G Pellacani, C Longo
BACKGROUND: Nevi of special sites encompass a class of benign lesions characterized by the presence of atypical clinical and histopathologic features that can be difficult to distinguish from melanoma. Dermoscopy and reflectance confocal microscopy may improve the clinical assessment of melanocytic lesions in order to avoid unnecessary excisions. OBJECTIVES: The aim of this study was to assess the value of specific dermoscopic and confocal criteria in distinguishing melanomas from nevi of the breast area...
November 10, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29043097/histological-study-on-the-effect-of-nicotine-on-adult-male-guinea-pig-thin-skin
#8
Sohair A Eltony, Safaa S Ali
Tobacco smoking has been identified as an important factor in premature skin aging to detect the histological changes occurred in adult male guinea pig thin skin under the influence of low and high doses of nicotine; which constitutes approximately 0.6%-3.0% of the dry weight of tobacco. Fifteen adult male pigmented guinea pigs were equally divided into three groups: group I, control; group IIA, low dose nicotine treated; 3 mg/kg subcutaneously for 4 weeks; and group IIB, high dose nicotine treated; 6 mg/kg subcutaneously for 4 weeks...
September 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/28915279/first-consensus-on-primary-prevention-and-early-intervention-in-aesthetic-medicine
#9
Marina Landau, Chytra V Anand, Thierry Besins, Yates Yen Yu Chao, Sabrina Guillen Fabi, Uliana Gout, Martina Kerscher, Tatjana Pavicic, Peter Hsien Li Peng, Berthold Rzany, Gerhard Sattler, Tunk Tiryaki, Heidi A Waldorf, Andre Braz
BACKGROUND: Facial aging is a complex interplay of extrinsic and intrinsic factors leading to progressive changes in the skin, subcutaneous tissue, and bone. Clinical experience suggests that early aesthetic intervention may slow the signs of aging, but treatment in the absence of symptoms or with minimal signs of aging has not yet been properly addressed. OBJECTIVES: To provide treatment recommendations for primary prevention and early intervention in individuals with no or minimal signs of aging...
September 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28816741/reflectance-confocal-microscopy-criteria-of-pigmented-squamous-cell-carcinoma-in-situ
#10
Neda Shahriari, Jane M Grant-Kels, Harold S Rabinovitz, Margaret Oliviero, Alon Scope
Pigmented squamous cell carcinoma in situ (pSCCis) is difficult to diagnose based on clinical and dermoscopic examination. Reflectance confocal microscopy (RCM) allows noninvasive differentiation between malignant and benign pigmented skin lesions. We determined the frequency of key RCM features of pSCCis and correlated the RCM criteria with the corresponding dermoscopic and histopathologic criteria. The study included 28 lesions with biopsy-proven diagnosis of pSCCis derived from 28 patients. Clinical, dermoscopic, and RCM images of these lesions were retrospectively analyzed by 3 independent observers...
August 9, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28813744/alkaptonuria-a-case-report-with-diagnostic-challenge
#11
Vasantha L Gali, Amy M Kerkvliet, Jacob M Kusmak, Jana K Elwood
Alkaptonuria is a rare autosomal recessive metabolic disorder caused by deficiency of homogentisic acid (HGA) oxidase, the only enzyme capable of catabolizing HGA. Deficiency of this enzyme leads to excess HGA which deposits in the connective tissue. We present a case of a 64-year-old woman who was referred to the dermatology clinic for a full body mole check and skin cancer screening. Clinically she had blue/gray pigmentation of the external ear and sclera. Also she had a domed papule on the left cheek with punctate gray pigmentation which was biopsied...
August 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28752785/localized-pigmentation-disorder-after-subcutaneous-pegylated-interferon-beta-1a-injection
#12
Giancarlo Coghe, Laura Atzori, Jessica Frau, Giuseppe Fenu, Lorena Lorefice, Maria Giovanna Marrosu, Eleonora Cocco
We report the case of a 42-year-old female patient who developed peculiar skin lesions due to subcutaneous polyethylene glycol (PEG) interferon beta-1a. The dermatological examination showed hypochromic macules that had coalesced into a 10-cm-diameter patch. On the abdomen injection sites, there was a greyish diffuse hyperpigmentation arranged irregularly in annular macules. Fungal infection, vitiligo and pityriasis alba were excluded. After 6 months, the lesions had worsened. This is the first case of localized pigmentation disorder reported with interferon beta, and while the clinical findings are not ascribable to vitiligo or interferon-related facial/mucosal hyperpigmentation, they may partially share the underlining mechanisms...
July 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28363663/enzymatic-debridement-of-deeply-burned-faces-healing-and-early-scarring-based-on-tissue-preservation-compared-to-traditional-surgical-debridement
#13
Alexandra Schulz, Paul Christian Fuchs, Irene Rothermundt, Alexandra Hoffmann, Lior Rosenberg, Yaron Shoham, Henrik Oberländer, Jennifer Schiefer
INTRODUCTION: Facial burns occur frequently and depending on the injured skin layers often heal with scars which may cause permanent functional and cosmetic sequelae. Preservation of the sensitive facial skin layers, especially of the dermis is essential for scarless epithelialisation. Enzymatic debridement of deep thermal burns has already been shown to assist with preserving viable dermis. However, up to date, there are no published reports on wound healing and in the long term aesthetic outcome after enzymatic debridement of facial burns...
March 28, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28160420/assessment-of-skin-pigmentation-by-confocal-microscopy-influence-of-solar-exposure-and-protection-habits-on-cutaneous-hyperchromias
#14
Ana Paula M Martini, Daiane G Mercurio, Patrícia M B G Maia Campos
BACKGROUND: Cutaneous hyperchromias are disorders of skin pigmentation involving an increase of melanin production and its irregular accumulation in skin cells. It is known that the use of sunscreens helps to prevent changes in the skin pigmentation pattern, but the structural and morphological alterations that occur in the different types of hyperpigmentations need better elucidation. OBJECTIVE: To assess the influence of solar exposure and protection habits on the pattern of skin pigmentation using reflectance confocal microscopy (RCM)...
February 3, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/27914108/diagnostic-usefulness-of-dermoscopy-in-differentiating-lichen-aureus-from-nummular-eczema
#15
Kee Suck Suh, Jong Bin Park, Myeong Hyeon Yang, Soo Young Choi, Hyun Hwangbo, Min Soo Jang
Lichen aureus (LA) is a variant of pigmented purpuric dermatosis that is characterized clinically by rust macules, papules or plaques, mainly on the legs. In some cases, LA can be difficult to be distinguished from nummular eczema (NE) with the naked eye. Dermoscopy can be applied to skin lesions, revealing additional features that can be highly valuable for correct diagnosis. This study was conducted to investigate characteristic dermoscopic findings of LA and to identify distinctive features that can differentiate it from NE...
May 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/27867747/early-diagnosis-of-genital-mucosal-melanoma-how-good-are-our-dermoscopic-criteria
#16
Tova Rogers, Melissa Pulitzer, Maria L Marino, Ashfaq A Marghoob, Oliver Zivanovic, Michael A Marchetti
BACKGROUND: There are limited studies on the dermoscopic features of mucosal melanoma, particularly early-stage lesions. Described criteria include the presence of blue, gray, or white colors, with a reported sensitivity of 100%. It is unclear if these features will aid in the detection of early mucosal melanoma or improve diagnostic accuracy compared to naked-eye examination alone. CASE: An Asian female in her fifties was referred for evaluation of an asymptomatic, irregularly pigmented patch of the clitoral hood and labia minora of unknown duration...
October 2016: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/27771125/-nested-melanoma
#17
M-H Jegou, P Huet, I Penchet
BACKGROUND: Nested melanoma in elderly subjects is an entity that has been reported in the literature only since 2012. In this paper, we describe its distinctive clinical, dermatoscopic and histopathological features and compare them to previous published cases, with the aim of highlighting certain specific criteria of this melanoma subtype. CASE REPORT: A 52-year-old man was referred for the presence on his chest of a large suspicious pigmented lesion of irregular shape and colour...
January 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/27692457/well-aging-early-detection-of-skin-aging-signs
#18
REVIEW
Caterina Longo
The aim of the current review is to provide an overview of the use of reflectance confocal microscopy to detect early skin aging signs. This new imaging tool holds the promise to morphologically explore the epidermis and upper dermis at nearly histologic resolution and over time. The main confocal findings of aged skin include the presence of irregular honeycombed pattern, linear skin furrows, mottled pigmentation, and distinct collagen types (coarse and huddled).
October 2016: Dermatologic Clinics
https://www.readbyqxmd.com/read/27689028/cutaneous-melanoma-in-asians
#19
REVIEW
Sang Yub Kim, Sook Jung Yun
Malignant melanoma is a rare disease in Asians but potentially the most aggressive form of skin cancer worldwide. It can occur in any melanocyte-containing anatomic site. Four main cutaneous melanoma subtypes are recognized: lentigo maligna melanoma, superficial spreading melanoma, acral lentiginous melanoma (ALM), and nodular melanoma. Generally, excessive exposure to ultraviolet (UV) radiation increases the risk of melanoma. The exception is ALM, which is the most common melanoma subtype in Asians and is not associated with UV radiation...
September 2016: Chonnam Medical Journal
https://www.readbyqxmd.com/read/27449517/an-intronic-mbtps2-variant-results-in-a-splicing-defect-in-horses-with-brindle-coat-texture
#20
Leonardo Murgiano, Dominik P Waluk, Rachel Towers, Natalie Wiedemar, Joëlle Dietrich, Vidhya Jagannathan, Michaela Drögemüller, Pierre Balmer, Tom Druet, Arnaud Galichet, M Cecilia Penedo, Eliane J Müller, Petra Roosje, Monika M Welle, Tosso Leeb
We investigated a family of horses exhibiting irregular vertical stripes in their hair coat texture along the neck, back, hindquarters, and upper legs. This phenotype is termed "brindle" by horse breeders. We propose the term "brindle 1 (BR1)" for this specific form of brindle. In some BR1 horses, the stripes were also differentially pigmented. Pedigree analyses were suggestive of a monogenic X-chromosomal semidominant mode of inheritance. Haplotype analyses identified a 5 Mb candidate region on chromosome X...
2016: G3: Genes—Genomes—Genetics
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