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Actinic keratoses

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https://www.readbyqxmd.com/read/28905294/high-patient-satisfaction-with-daylight-activated-methyl-aminolevulinate-cream-in-the-treatment-of-multiple-actinic-keratoses-results-of-an-observational-study-in-australia
#1
Jo-Ann See, Kurt Gebauer, Jason K Wu, Shobhan Manoharan, Nabil Kerrouche, John Sullivan
INTRODUCTION: Actinic keratoses (AK) are treated to reduce the risk of progression to squamous cell carcinoma and for symptomatic and cosmetic benefits. The objective of this observational study was to generate real-life data on the use of daylight photodynamic therapy with methyl aminolevulinate cream (MAL DL-PDT) in treating mild to moderate facial/scalp AK. METHODS: A multicenter, prospective, observational study was conducted in Australia in patients receiving a single treatment of MAL DL-PDT for mild to moderate AK...
September 13, 2017: Dermatology and Therapy
https://www.readbyqxmd.com/read/28871935/topical-imiquimod-is-an-effective-and-safe-drug-for-molluscum-contagiosum-in-children
#2
George Badavanis, Efstathia Pasmatzi, Alexandra Monastirli, Sophia Georgiou, Dionysios Tsambaos
Dear Editor, Molluscum contagiosum (MC) is a very common skin infection caused by a molluscipox virus gene of the poxvirus family. It usually occurs in young children, sexually active adults, and immunocompromised individuals. The typical clinical picture of this infection is characterized by asymptomatic flesh-colored, single or multiple papules, measuring 2-6 mm in diameter with a central umbilication that occur on the skin and the mucous membranes. In adults, the skin lesions are predominantly located in the genital region, whereas in children they are found on the trunk, the extremities, and the face...
July 2017: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/28853496/incidence-and-regression-of-actinic-keratoses-in-organ-transplant-recipients
#3
Zainab Jiyad, Louise Marquart, Peter O'Rourke, Adèle C Green
Actinic keratoses (AKs) are highly dynamic lesions and AK activity has been shown to be associated with squamous cell carcinoma (SCC). We sought to explore risk factors which may affect the 12-month turnover of AKs in organ transplant recipients (OTRs). The number of incident AKs, regressed AKs and net change in AK counts were calculated. Negative binomial regression and Poisson regression models were used to estimate rate ratios (RR) for these 3 outcomes. Among 150 renal and 89 liver OTRs, those who spent > 50% of a typical weekday in the sun had a lower rate of AK regression than those who spent minimal time in the sun during a typical weekday...
August 30, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/28844940/subclonal-evolution-of-cancer-related-gene-mutations-in-p53-immunopositive-patches-in-human-skin
#4
Amel A Albibas, Matthew J J Rose-Zerilli, Chester Lai, Reuben J Pengelly, Gabrielle A Lockett, Jeffrey Theaker, Sarah Ennis, John W Holloway, Eugene Healy
Normal sun-exposed skin contains numerous epidermal patches that stain positive for p53 protein (p53 immunopositive patches; PIPs), which are considered potential early precursors of skin cancer. Whilst the TP53 gene is mutated in many PIPs, it is unclear whether PIPs contain any other cancer-related mutations. Here we report that PIPs, predominantly <3,000 p53 immunopositive cells in size, within normal chronically exposed skin contain mutations in multiple genes which are mutated in cutaneous squamous cell cancers...
August 24, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28809998/temporal-association-of-herpes-zoster-eruption-post-aminolevulinic-acid-hydrochloride-photodynamic-therapy-for-actinic-keratoses
#5
Katie Manno, Joel L Cohen
<p>Herpes zoster is a common and painful disease caused by the reactivation of the varicella-zoster virus with a higher incidence and severity associated with increasing age as well as compromised immune status. Acute inciting events for this eruption are not always known, but can include illness, stress, and mechanical injury. Photodynamic therapy (PDT) is a widely used treatment modality for precancerous skin lesions that has not been previously associated with provoking a herpes zoster outbreak. We present a case of herpes zoster eruption occurring after PDT for actinic keratoses in a patient with Non-Hodgkin Lymphoma (NHL)...
August 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28796914/actinic-keratoses-show-variable-histological-basal-growth-patterns-a-proposed-classification-adjustment
#6
L Schmitz, T Gambichler, G Gupta, M Stücker, E Stockfleth, R M Szeimies, T Dirschka
BACKGROUND: Common histological classification schemes of actinic keratoses (AK) do not evaluate growth patterns at basal epidermal aspects of AK. Until now, the importance of basal epidermal growth patterns of AK has not been studied. OBJECTIVE: To investigate the extent of atypical keratinocytes throughout the epidermis and variation in basal growth patterns of AK. METHODS: AK lesions occurring on the head/face from patients seen in routine practice were assessed histologically...
August 10, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28796885/photodynamic-therapy-is-more-effective-than-imiquimod-for-actinic-keratosis-in-organ-transplant-recipients-a-randomized-intra-individual-controlled-trial
#7
K Togsverd-Bo, C Halldin, C Sandberg, H Gonzalez, A M Wennberg, S S Sørensen, H C O Wulf, M Haedersdal
BACKGROUND: Actinic keratoses (AKs) in solid organ transplant recipients (OTRs) are difficult-to-treat pre-malignancies and comparison of topical therapies is therefore warranted. OBJECTIVES: In an intra-individual study to compare efficacy and safety of field treatment with methyl aminolevulinate photodynamic therapy (MAL-PDT) and imiquimod (IMIQ) for AKs in OTRs. MATERIALS AND METHODS: OTRs (n=35) with 572 AKs (grade I-III) in two similar areas in the face, scalp, dorsal hands or forearms were included...
August 10, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28780136/pain-during-topical-photodynamic-therapy-comparing-methyl-aminolevulinate-metvix-%C3%A2-to-aminolaevulinic-acid-ameluz-%C3%A2-an-intra-individual-clinical-study
#8
Shiva Yazdanyar, Kian Zarchi, Gregor B E Jemec
BACKGROUND: Actinic keratoses are often treated by photodynamic therapy. However, the main side effects of this treatment is pain during and short after illumination. OBJECTIVES: To evaluate, in an intra-individual study, whether the pain response differ in treatment of actinic keratoses in scalp and forhead, using branded methyl aminolevulinate (MAL) and aminolaevulinic acid (ALA). Materials and methods Patients with mild to moderate actinic keratoses on forehead and scalp were treated with methyl aminolaevulinate (MAL)-PDT and aminolaevulinic acid (ALA)-PDT on two similar areas of forehead and scalp...
August 2, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28716738/photodynamic-therapy-and-pain-a-systematic-review
#9
Jennifer Maria Ang, Irbaz Bin Riaz, Muhammad Umar Kamal, Gyorgy Paragh, Nathalie C Zeitouni
Photodynamic therapy (PDT) is an effective treatment for actinic keratoses and early skin cancers, and the only office procedure to control field cancerization. Procedure-associated pain limits widespread PDT use and by early termination of treatment can decrease overall therapeutic efficacy. Here we review and assess reported interventions on PDT-associated pain, in order to identify the most promising methods to manage treatment-associated pain and identify focus for future studies. Literature search was performed using MEDLINE, EMBASE, and the Cochrane Library by two independent reviewers to select publications that assessed and compared pain quantitatively during PDT treatment for actinic keratoses, basal cell carcinomas, and/or in situ squamous cell carcinomas...
July 14, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28708084/molecular-mechanisms-of-human-papillomavirus-induced-skin-carcinogenesis
#10
Martin Hufbauer, Baki Akgül
Infection of the cutaneous skin with human papillomaviruses (HPV) of genus betapapillomavirus (βHPV) is associated with the development of premalignant actinic keratoses and squamous cell carcinoma. Due to the higher viral loads of βHPVs in actinic keratoses than in cancerous lesions, it is currently discussed that these viruses play a carcinogenic role in cancer initiation. In vitro assays performed to characterize the cell transforming activities of high-risk HPV types of genus alphapapillomavirus have markedly contributed to the present knowledge on their oncogenic functions...
July 14, 2017: Viruses
https://www.readbyqxmd.com/read/28695987/actinic-keratoses-treated-with-cold-atmospheric-plasma
#11
M Wirtz, I Stoffels, J Dissemond, D Schadendorf, A Roesch
Plasma is a partially or fully ionized gaseous state of matter containing chemically active species, such as ions, electrons, photons, reactive oxygen and nitrogen species, and UV light. Cold atmospheric plasma (CAP) can be applied onto vital, heat-sensitive surfaces and is currently used in surgery, endoscopic procedures, and wound care with proven antimicrobial efficacy and the ability to deactivate pathogens, stop bleeding and stimulate cell proliferation (1)(2) . Recent pre-clinical observations suggested an anti-tumoral potential, for example in melanoma, glioma and colorectal carcinoma cells (3)(4) ...
July 11, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28692931/automatic-discrimination-of-actinic-keratoses-from-clinical-photographs
#12
Panagiota Spyridonos, Georgios Gaitanis, Aristidis Likas, Ioannis D Bassukas
BACKGROUND AND OBJECTIVE: Actinic keratoses (AK) are common premalignant skin lesions that can progress to invasive skin squamous cell carcinoma (sSCC). The subtle accumulation of multiple AK in aging individuals increases the risk of sSCC development, and this underscores the need for efficient treatment and patient follow-up. Our objectives were to develop a method based on color texture analysis of standard clinical photographs for the discrimination of AK from healthy skin and subsequently to test the developed approach in the quantification of field-directed treatment interventions...
September 1, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28685901/erosive-pustular-dermatosis-of-the-scalp-following-topical-ingenol-mebutate-for-actinic-keratoses
#13
Mario Vaccaro, Francesco Borgia, Lorenzo Gasco, Serafinella P Cannavò
No abstract text is available yet for this article.
July 7, 2017: Dermatologic Therapy
https://www.readbyqxmd.com/read/28681504/melanoma-and-non-melanoma-skin-cancer-chemoprevention-a-role-for-nicotinamide
#14
REVIEW
Rashi Minocha, Diona L Damian, Gary M Halliday
Ultraviolet radiation (UVR) causes DNA damage in melanocytes by producing photolesions such as cyclobutane pyrimidine dimers and 8-oxo-7-hydrodeoxyguanosine. The production of reactive oxygen species by UVR also induces inflammatory cytokines that, together with the inherent immunosuppressive properties of UVR, propagate carcinogenesis. Nicotinamide (Vitamin B3 ) enhances DNA repair, modulates the inflammatory environment produced by UVR and reduces UV-induced immunosuppression. As nicotinamide reduces the incidence of actinic keratoses and non-melanoma skin cancers in high-risk individuals, and enhances repair of DNA damage in melanocytes, it is a promising agent for the chemoprevention of melanoma in high-risk populations...
July 5, 2017: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/28662116/actinic-keratosis-modelling-in-mice-a-translational-study
#15
Arnaud Pillon, Bruno Gomes, Isabelle Vandenberghe, Valérie Cartron, Patrick Cèbe, Jean-Christophe Blanchet, Vincent Sibaud, Nicolas Guilbaud, Laurent Audoly, Laurence Lamant, Anna Kruczynski
BACKGROUND: Actinic keratoses (AK) are pre-malignant cutaneous lesions caused by prolonged exposure to ultraviolet radiation. As AKs lesions are generally accepted to be the initial lesions in a disease continuum that progresses to squamous cell carcinoma (SCC), AK lesions have to be treated. They are also the second most common reason for visits to the dermatologist. Several treatments are available but their efficacy still needs to be improved. The UV-B-induced KA lesion mouse model is used in preclinical studies to assess the efficacy of novel molecules, even though it is often more representative of advanced AK or SCC...
2017: PloS One
https://www.readbyqxmd.com/read/28661544/efficacy-of-a-daily-protective-moisturizer-with-high-uvb-and-uva-photoprotection-in-decreasing-ultraviolet-damage-evaluation-by-reflectance-confocal-microscopy
#16
Antonio Gomes-Neto, Paula Aguilera, Leonor Prieto, Sophie Seité, Dominique Moyal, Cristina Carrera, Josep Malvehy, Susana Puig
Patients with photodermatoses or actinic keratoses benefit from very high ultraviolet B-ultraviolet A (UVB-UVA) photoprotection. However, poor compliance is an issue that jeopardizes adequate protection, leading to disease recurrence. This study evaluated the efficacy of a daily protective moisturizer with high UVB and UVA photoprotection applied 8 h before irradiation. A monocentric, open-label, prospective, control pilot study was performed including 10 patients. Patients were irradiated with UVB and UVA before and 8 h after topical application of the product...
June 29, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/28647616/photodynamic-therapy-in-dermatology-beyond-non-melanoma-cancer-an-update
#17
REVIEW
Xiang Wen, Yong Li, Michael R Hamblin
Photodynamic therapy (PDT) employs a photosensitizer (PS) and visible light in the presence of oxygen, leading to production of cytotoxic reactive oxygen species, which can damage the cellular organelles and cause cell death. In dermatology, PDT has usually taken the form of topical application of a precursor in the heme biosynthesis pathway, called 5-aminolevulinic acid (or its methyl ester), so that an active PS, protoporphyrin IX accumulates in the skin. As PDT enhances dermal remodeling and resolves chronic inflamation, it has been used to treat cutaneous disorders include actinic keratoses, acne, viral warts, skin rejuvenation, psoriasis, localized scleroderma, some non-melanoma skin cancers and port-wine stains...
September 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28595997/hpv8-field-cancerization-in-a-transgenic-mouse-model-is-due-to-lrig1-keratinocyte-stem-cell-expansion
#18
Simone Lanfredini, Carlotta Olivero, Cinzia Borgogna, Federica Calati, Kathryn Powell, Kelli-Jo Davies, Marco De Andrea, Sarah Harries, Hiu Kwan Carolyn Tang, Herbert Pfister, Marisa Gariglio, Girish K Patel
β-HPV cause near ubiquitous latent skin infection within long-lived hair follicle keratinocyte stem cells (HF KSC). In patients with epidermodysplasia verruciformis (EV), β-HPV viral replication is associated with skin keratosis and cutaneous squamous cell carcinoma (SCC). To determine the role of HF KSC in β-HPV induced skin carcinogenesis, we utilized a transgenic mouse model in which the keratin 14 promoter drives expression of the entire HPV8 early region (HPV8tg). HPV8tg mice developed thicker skin in comparison to wild type littermates consistent with a hyperproliferative epidermis...
June 5, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28593242/primary-care-based-skin-cancer-screening-in-a-veterans-affairs-health-care-system
#19
Susan M Swetter, Julia Chang, Amanda R Shaub, Martin A Weinstock, Eleanor T Lewis, Steven M Asch
Importance: Skin cancer screening may improve melanoma outcomes and keratinocyte carcinoma morbidity, but little is known about the feasibility of skin cancer training and clinical skin examination (CSE) by primary care practitioners (PCPs) in large health care systems. Objective: To assess the association of skin cancer training and screening by PCPs with dermatology referral patterns and rates of skin biopsies. Design, Setting, and Participants: In this pilot interventional study performed at the Veterans Affairs Palo Alto Health Care System, patients 35 years or older scheduled for an annual health habits screen in the PCP general medicine clinics were studied...
August 1, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28591439/retrospective-evaluation-of-exposure-to-natural-uv-radiation-experiences-with-the-online-uv-history-tool-in-a-field-study
#20
Wobbeke Weistenhöfer, Julia Hiller, Hans Drexler, Johannes Kiesel
BACKGROUND: Cutaneous squamous cell carcinoma and multiple actinic keratoses can be recognized as occupational diseases if the site affected has been subjected to additional occupational UV exposure of at least 40 %. An online UV history tool that allows for the quantification of occupational and recreational UV doses was now tested in a field study. PATIENTS AND METHODS: Ninety-nine patients with nonmelanoma skin cancer were examined. Patient history with respect to UV exposure was obtained using the online UV history tool...
June 2017: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
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