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https://www.readbyqxmd.com/read/28334906/conformational-polymorphism-or-structural-invariance-in-dna-photoinduced-lesions-implications-for-repair-rates
#1
François Dehez, Hugo Gattuso, Emmanuelle Bignon, Christophe Morell, Elise Dumont, Antonio Monari
DNA photolesions constitute a particularly deleterious class of molecular defects responsible for the insurgence of a vast majority of skin malignant tumors. Dimerization of two adjacent thymines or cytosines mostly gives rise to cyclobutane pyrimidine dimers (CPD) and pyrimidine(6-4)pyrimidone 64-PP as the most common defects. We perform all-atom classical simulations, up to 2 μs, of CPD and 64-PP embedded in a 16-bp duplex, which reveal the constrasted behavior of the two lesions. In particular we evidence a very limited structural deformation induced by CPD while 64-PP is characterized by a complex structural polymorphism...
February 28, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28334263/pathogenesis-of-meningococcal-purpura-fulminans
#2
H Lécuyer, D Borgel, X Nassif, M Coureuil
Purpura fulminans (PF) is a dreadful and frequent complication of Neisseria meningitidis invasive infection, and is associated with a high mortality rate. This syndrome begins with dermal microvessels thrombosis that rapidly lead to hemorrhagic skin necrosis. In this review, we discuss the prothrombotic events occurring during meningococcal infection. Moreover, recent data from an experimental mouse model have highlighted the critical role of the meningococcus adhesion to the endothelium in the development of PF lesions, thus opening new therapeutic perspectives...
March 9, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28333601/simultaneous-occurrence-of-varicella-zoster-virus-induced-pancreatitis-and-hepatitis-in-a-renal-transplant-recipient-a-case-report-and-review-of-literature
#3
Puneet Chhabra, Priyadarshi Ranjan, Deepak K Bhasin
INTRODUCTION: Gastrointestinal complications are common after renal transplantation, including oral lesions, esophagitis, gastritis, diarrhea, and colon carcinoma. The differential diagnosis is difficult in this scenario because multiple factors such as drugs, infections, and preexisting gastrointestinal disease come into play. CASE PRESENTATION: We report a case of varicella zoster virus-induced pancreatitis and hepatitis in a renal transplant recipient. The patient underwent renal transplantation 3 years earlier and now presented with severe pain in the epigastrium radiating to his back and had raised serum lipase levels and skin lesions characteristic of varicella...
2017: Permanente Journal
https://www.readbyqxmd.com/read/28333405/use-of-nanofractional-radiofrequency-for-the-treatment-of-acne-scars-in-indian-skin
#4
Apratim Goel, Vallari Gatne
BACKGROUND: Pitted acne scars of all types remain notoriously challenging to treat with no satisfactory treatment modality, particularly true for darker Fitzpatrick skin types such as Indian skin. AIM: Nanofractional radiofrequency has been shown to be an effective treatment modality for the cosmetic improvement of acne scars. METHODS: Twenty healthy male and female Indian patients aged 16-60 years with Fitzpatrick skin types IV-V and moderate-to-severe acne scar lesions received 1-3 treatments with a nanofractional radiofrequency device (Venus Viva) at baseline and at 3- to 6 week intervals and were evaluated with photographs at each treatment visit and up to 6 months after the final treatment session...
March 23, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28332777/diagnostic-performance-of-the-melafind-device-in-a-real-life-clinical-setting
#5
Christine Fink, Claudia Jaeger, Katharina Jaeger, Holger A Haenssle
BACKGROUND: MelaFind is a multispectral computer vision system intended to -provide additional information on melanocytic lesions suspected of being melanoma by -objectively assessing their three-dimensional morphology. OBJECTIVES: Analysis of the diagnostic performance of MelaFind in a real-life clinical setting. PATIENTS AND METHODS: In this observational study, 360 pigmented skin lesions (PSL) in 111 patients were assessed by office-based dermatologists using MelaFind...
March 23, 2017: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/28331557/adapalene-benzoyl-peroxide-gel-is-efficacious-and-safe-in-adult-female-acne-with-a-profile-comparable-to-that-seen-in-teen-aged-females
#6
Linda Stein Gold, Hilary Baldwin, Maria Jose Rueda, Nabil Kerrouche, Brigitte DrÉno
Objectives: To evaluate the efficacy and safety of adapalene 0.1% benzoyl peroxide 2.5% gel in women aged 25 years or older via subgroup analysis of existing Phase 2 and 3 study data. Methods: Meta-analysis of pooled data from three multicenter, randomized, double-blind, vehicle-controlled, parallel-group, clinical trials compared results of treatment with either adapalene 0.1% benzoyl peroxide 2.5% gel or vehicle gel in adult females and teen-aged females. Efficacy assessments included investigator's global assessment and median percent change in acne lesions...
July 2016: Journal of Clinical and Aesthetic Dermatology
https://www.readbyqxmd.com/read/28329662/the-preneoplastic-genome-transcriptomic-drivers-of-squamous-cell-carcinoma-development
#7
Kenneth Y Tsai
Cutaneous squamous cell carcinoma (cuSCC) comprises 15-20% of all skin cancers, accounting for over 700,000 cases in the U.S. annually. Most cuSCC arise in association with a distinct precancerous lesion, the actinic keratosis (AK). In order to identify potential targets for molecularly targeted chemoprevention, we performed integrated cross-species genomic analysis of cuSCC development through the preneoplastic AK stage using matched human samples and a solar UV- driven Hairless mouse model. We performed RNA-seq and microRNA-seq on samples from both patients undergoing Mohs surgery and the mouse model...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329632/cigarette-smoking-and-the-risks-of-incident-basal-cell-carcinoma-and-squamous-cell-carcinoma-in-a-large-population-based-cohort-study
#8
Jean Claude Dusingize, Catherine M Olsen, Nirmala Pandeya, Bridie Thompson, Rachel E Neale, Padmini Subramaniam, David C Whiteman, Adele C Green
Tobacco smoking is a strong risk factor for cancer, but associations with basal cell carcinomas (BCC) and squamous cell carcinomas (SCC) of the skin have been inconsistent. We prospectively investigated the associations between cigarette smoking and 3-year incidence of first primary BCC or SCC in the QSkin cohort (n=43765). Smoking history was self-reported at baseline; newly diagnosed and surgically treated BCCs and SCCs were ascertained through linkage to the national health insurance scheme and verified by histopathology reports...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329631/the-burden-of-keratinocyte-cancer-occurrence-multiplicity-and-predicting-risk
#9
David C Whiteman, Nirmala Pandeya, Bridie Thompson, Padmini Subramaniam, Jean Claude Dusingize, Rachel E Neale, Adele C Green, Catherine M Olsen
The costs of diagnosing and treating basal cell carcinomas (BCC) and squamous cell carcinomas (SCC) are the highest of all cancers in Australia. However, information regarding incidence, multiplicity and risk are scarce as keratinocyte cancers (KCs) are not captured by most registries. To address these gaps, we initiated the QSKIN Study in 2010 recruiting 43,794 Queensland residents from a population register (participation 24%). Participants self-completed a baseline survey recording information on residential history, sun exposure, phenotype and medical and family history...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329625/advanced-basal-cell-carcinomas-appear-preferentially-on-the-scalp-of-patients-with-basal-cell-carcinoma-nevus-syndrome
#10
Brittany Urso, Katelyn Updyke, James A Solomon
Basal Cell Carcinoma Nevus Syndrome is a rare condition in which patients need to meet certain major or minor diagnostic criteria or test positive for chromosome 9 or PTCH1 mutations to be diagnosed. The results of an internet based survey of self-identified adults with BCCNS which was launched through SurveyMonkey with access provided by the Basal Cell Carcinoma Nevus Syndrome Life Support Network (www.BCCNS.org). Of 45 respondents, 11 individuals reported having locally advanced BCCs and 6 individuals reported having both locally advanced and metastatic BCCs...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329624/actinic-keratoses-progress-more-quickly-to-squamous-cell-carcinoma-than-basal-cell-carcinoma
#11
Julia A Siegal, Joanna L Walker, Moniyka Sachar, Robert A Lew, Suephy C Chen, Susan M Swetter, Robert P Dellavalle, George P Stricklin, Martin A Weinstock
Actinic keratoses (AK) are common, costly, and may evolve to keratinocyte carcinoma (KC): basal cell (BCC) and squamous cell carcinoma (SCC) of the skin. Time to malignant transformation is controversial. We used data from the placebo arm (n=166) of a randomized trial of veterans with multiple prior KCs. Study dermatologists examined participants' faces/ears at enrollment and semiannual visits. Clinically diagnosed AKs were marked, photographed, and treated with cryotherapy (starting at 6 months). Lesions suspicious for KC were marked, photographed, and biopsied...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329611/terap%C3%A3%C2%AAutica-fotodin%C3%A3-mica-com-metil-aminolevulinato-no-tratamento-de-les%C3%A3%C2%B5es-refract%C3%A3-rias-de-micose-fung%C3%A3-ide-resposta-cl%C3%A3-nica-e-histol%C3%A3-gica-mantida-em-dois-doentes
#12
Ana Isabel Teixeira, João Maia E Silva
According to the guidelines proposed by the National Comprehensive Cancer Network, early-stage Mycosis Fungoides (MF) should be treated with skin-directed therapies such as topical steroids or retinoids, topical chemotherapy (carmustin and nitrogen mustard), photochemotherapy, and superficial radiotherapy. Patients with refractory lesions to these therapeutic options are particularly challenging. Photodynamic Therapy (PDT) has been approved to treat cutaneous neoplastic and pre-neoplastic lesions such as superficial basal cell carcinoma, Bowen disease and actinic keratosis...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329586/cd30-lymphoproliferative-disorder-in-a-patient-with-metastatic-papillary-thyroid-carcinoma
#13
Jeremy Udkoff, Philip R Cohen
Background CD30+ lymphoproliferative disorders are rare and may feature a wide variety of presentations that mimic other conditions. Purpose A man with metastatic papillary thyroid carcinoma to skin who subsequently developed cutaneous anaplastic large cell lymphoma is described. Methods The PubMed medical database was used to search the following terms separately and in combination: ALCL, anaplastic large cell lymphoma ALCL, cutaneous anaplastic large cell lymphoma CALCL, cutaneous t-cell lymphoma CTCL, large t-cell lymphoma LTCL, lymphoproliferative, lymphomatoid papulosis LyP, mimic, papillary, thyroid cancer...
October 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329573/a-diagnostic-challenge
#14
D Ismail, G Langman, S D Orpin
A 74 year-old woman presented with a 9 month history of a slowly enlarging exophytic lesion over her left nasal alar. Examination revealed a firm, cystic mass fixed to underlying skin. It was pedunculated with occasional superficial telangiectasia and a violaceous hue. A differential diagnosis of dermoid or sebaceous cyst, dermatofibroma, and neurofibroma was considered. Histopathological examination confirmed the rare diagnosis of chondroid syringoma (CS), which has a reported incidence of 0.01- 0.098% of excised skin tumors...
November 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329568/localized-cutaneous-argyria-report-of-two-patients-and-literature-review
#15
Bryce David Beutler, Robert A Lee, Philip R Cohen
BackgroundLocalized cutaneous argyria is a rare skin condition caused by direct contact with silver or silver particles. It presents as asymptomatic gray or blue-gray macules that appear similar to blue nevi. Histologic features include brown-colored or black-colored silver granules in the basement membrane and dermis, most commonly surrounding eccrine glands, elastic fibers, and collagen fibrils. The condition is most frequently observed in individuals who are regularly exposed to small silver particles, such as silversmiths and welders...
November 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329558/integrating-the-integrated-skin-exam-film-into-medical-education
#16
Seth Lofgreen, Michael Lehrer, Paige Bennett, Amit Garg, Cory A Dunnick
AbstractBackgroundThe mortality rate for melanoma continues to rise and the greatest improvement in melanoma survival is attributable to early detection with skin cancer screening exams. However, physicians feel that limited training in the examination of skin and limited clinical time both serve as barriers to adequately assess high-risk lesions.ObjectiveTo test the use of The Integrated Skin Exam film as an instructional tool to teach the examination of skin in a live classroom setting, outside of the purview of the original formal study...
November 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329553/primary-cutaneous-marginal-zone-lymphoma
#17
Joshua Farhadian, Vtaly Terushkin, Shane A Meehan, Jo-Ann Latkowski
Primary cutaneous B cell lymphomas (PCBCL) are thesecond most common type of primary cutaneouslymphoma. The three main types of PCBCL areprimary cutaneous marginal-zone lymphoma(PCMZL), primary cutaneous follicle-centerlymphoma, and primary cutaneous diffuse largeB-cell lymphoma, leg type. PCMZL has an indolentcourse with a five-year survival rate approaching99%. Lesions most often present on the trunk or armas erythematous-to-violaceous papules, plaques, ornodules. Approximately one-half of patients havesolitary skin lesions...
December 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329543/herpes-simplex-virus-in-erythrokeratoderma-variabilis
#18
Shields Callahan, Euphemia Mu, Randie H Kim, Shane A Meehan, Paul Possick
We report a 48 -year-old woman witherythrokeratoderma variabilis, which is a rarehereditary disorder of keratinization, who developednew, painful, blisters within her skin lesions. Thediagnosis of herpes simplex virus infection was madebased on the clinical history and histopathologicfeatures. She was successfully treated withprophylactic valacyclovir, and her herpetic outbreakshave halted. This case serves as a reminder thateven among the most rare skin disorders, commonsecondary complications may be easily overlooked...
December 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329538/primary-cutaneous-smoldering-adult-t-cell-leukemia-lymphoma
#19
Julia Gittler, Kathryn Martires, Vitaly Terushkin, Nooshin Brinster, David Ramsay
HTLV-1 is a virus that is endemic in southwesternJapan and the Caribbean and has been implicatedin the development of ATLL. ATLL, which is anuncommon malignant condition of peripheralT-lymphocytes, is characterized by four clinicalsubtypes, which include acute, lymphomatous,chronic, and smoldering types, that are based onLDH levels, calcium levels, and extent of organinvolvement. We present a 52-year- old woman withpruritic patches with scale on the buttocks and withtender, hyperpigmented macules and papules oftwo-years duration...
December 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329529/concurrent-pyogenic-granuloma-and-bullous-impetigo-of-a-pregnant-woman-s-finger
#20
Rosie Qin, Philip R Cohen
BACKGROUND: Bullous impetigo is a superficial skininfection caused by Staphylococcus aureus (S.aureus). Pyogenic granuloma is a common benigntumor frequently associated with prior trauma.Bullous impetigo and pyogenic granuloma may occurin pregnant women. PURPOSE: The features of a pregnant womanwith pyogenic granuloma and bullous impetigoconcurrently present in a lesion on her finger aredescribed. METHODS: PubMed was used to search the followingterms: bullous impetigo, pregnancy, and pyogenicgranuloma...
March 15, 2017: Dermatology Online Journal
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