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Actinic keratosis

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https://www.readbyqxmd.com/read/28711897/studying-risk-factors-for-skin-cancer-development
#1
Оlena О Оshyvalova
INTRODUCTION: In most countries with a population of mainly European origin, non-melanoma skin carcinoma incidence rate has increased over the last decade. Understanding of what is the best way to identify people at high risk for skin cancer development will help to optimize the strategy for prevention and treatment tactics. Aim of the research involves studying risk factors for skin cancer development in patients with cutaneous squamous cell carcinoma and squamous cell carcinoma in situ (cSCC and SCCis correspondingly) and patients with actinic keratosis (AK)...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28707711/rosettes-in-actinic-keratosis-and-squamous-cell-carcinoma-distribution-association-to-other-dermoscopic-signs-and-description-of-the-rosette-pattern
#2
B Lozano-Masdemont, I Polimón-Olabarrieta, S Marinero-Escobedo, A Gutierrez-Pecharromán, E Rodríguez-Lomba
BACKGROUND: Rosettes, a dermoscopic structure characterized by four white points arranged as a 4-leaf clover, supports the dermoscopic diagnosis of actinic keratosis (AK) or squamous cell carcinoma (SCC). OBJECTIVE: The association of rosettes with other dermoscopic structures in AK or SCC and their distribution has not been analysed yet. METHODS: We conducted a prospective study of patients with histologically proven AK or SCC who presented dermoscopic rosettes at initial evaluation...
July 14, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28705516/dermoscopy-of-pigmented-actinic-keratosis-of-the-face-a-study-of-232-cases
#3
A Kelati, H Baybay, E Moscarella, G Argenziano, S Gallouj, F Z Mernissi
The diagnosis of pigmented actinic keratosis (PAK) is often challenging because of overlapping features with lentigo maligna. OBJECTIVE: To investigate dermoscopic patterns of PAK according to their different evolutionary stages, and to correlate the pattern with clinical characteristics of the patients. METHODS: Descriptive and analytical study of 232 PAK. Dermoscopic patterns were divided into two categories: the follicule surroundings' abnormalities (FSA) and follicular keratosis' abnormalities (FKA)...
July 11, 2017: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/28703320/5-aminolevulinic-acid-patch-pdt-in-the-treatment-of-actinic-cheilitis
#4
Sonja Radakovic, Adrian Tanew
BACKGROUND: Actinic cheilitis (AC) is a common disease caused by chronic ultraviolet exposure. OBJECTIVE: Alacare is a self-adhesive, skin coloured 5-aminolaevulinic acid (ALA) patch that has been developed for the treatment of mild to moderate actinic keratosis (AK). Considering the good results in the treatment of AK, the standardized delivery of ALA and the simple application Alacare patch PDT appears as an interesting treatment option for AC. METHODS: We retrospectively assessed the efficacy, tolerability and cosmetic outcome of Alacare patch PDT in eleven patients with AC...
July 13, 2017: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/28692051/transcriptional-regulation-of-ataxia-telangiectasia-and-rad3-related-protein-by-activated-p21-activated-kinase-1-protects-keratinocytes-in-uv-b-induced-premalignant-skin-lesions
#5
S Beesetti, J Mavuluri, R P Surabhi, T M Oberyszyn, K Tober, R S Pitani, L D Joseph, G Venkatraman, S K Rayala
Sun-induced skin lesions, in particular actinic keratosis, are generally considered as premalignant skin lesions that can progress into squamous cell carcinoma (SCC) and invasive SCC if left untreated. Therefore, understanding the molecular mechanisms by which the ultraviolet-B (UV-B)-exposed cells are being protected and the signaling pathways that promote the progression of certain premalignant skin lesions to malignant lesions will permit us to prevent or cure skin cancers. In the current study, we found that phospho-p21-activated kinase-1 (Pak1) and Pak1 expression was high in clinical samples of sunlight-induced premalignant skin lesions assessed by immunohistochemistry...
July 10, 2017: Oncogene
https://www.readbyqxmd.com/read/28681396/association-of-atopy-and-tentative-diagnosis-of-skin-cancer-results-from-occupational-skin-cancer-screenings
#6
I Schäfer, P Mohr, N Zander, R Fölster-Holst, M Augustin
BACKGROUND: The relationship between atopic conditions and carcinoma of the skin has been described inconsistently. Population-based data providing information on atopic diseases as well as on skin-cancer are sparse. OBJECTIVE: To determine the correlation between atopy and prevalence of precanceroses, nonmelanoma skin-cancer and malignant melanoma (MM), while taking into account known risk factors for skin cancer. METHODS: Data from occupational skin cancer screenings were analysed in a cross-sectional study...
July 6, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28663925/noninvasive-mesoscopic-imaging-of-actinic-skin-damage-using-spatial-frequency-domain-imaging
#7
Jeffrey B Travers, Chien Poon, Daniel J Rohrbach, Nathan M Weir, Elizabeth Cates, Faye Hager, Ulas Sunar
For prevention and accurate intervention planning, it is crucial to predict if lesions will progress towards cancer. In this study, we investigated the change in optical properties and vascular parameters to characterize skin tissue from mild photodamage to actinic keratosis (AK). Multi-wavelength spatial frequency domain imaging (SFDI) measurements were performed on three patients with clinically normal skin, as well as pre-cancerous actinic keratosis lesions. Our results indicate that there exist significant differences in both optical and vascular parameters between these patients, and that these parameters can be early biomarkers of neoplasia...
June 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28662116/actinic-keratosis-modelling-in-mice-a-translational-study
#8
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/28661125/phasor-flim-as-a-screening-tool-for-the-differential-diagnosis-of-actinic-keratosis-bowen-s-disease-and-basal-cell-carcinoma
#9
Teng Luo, Yuan Lu, Shaoxiong Liu, Danying Lin, Junle Qu
The aim of this study was to distinguish basal cell carcinoma (BCC) from actinic keratosis (AK) and Bowen's disease (BD) by fluorescence lifetimes of hematoxylin and eosin (H&E) and phasor analysis. Pseudocolor images of average fluorescence lifetime (τm) exhibited more contrast than conventional bright field and/or fluorescence images of H&E-stained sections. The mean values (μ) of τm distribution (τmμ) in three layers of skin were first explored for comparison with the corresponding layers of AK, BD, and BCC...
July 18, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28658998/patient-reported-outcomes-in-topical-field-treatment-of-actinic-keratosis-in-swedish-and-danish-patients
#10
Hanna Norrlid, Jenny M Norlin, Heidi Holmstrup, Irena Malmberg, Karin Sartorius, Henrik Thormann, Gregor B E Jemec, Gunnel Ragnarson Tennvall
Topical treatments in dermatology can be long, complex and lead to nonadherence and nonpersistence to prescribed treatment. Clinical efficacy observed in randomized clinical trials (RCT) may therefore be reduced in real-world clinical practice. The objective of this study was to analyze patient-reported treatment adherence, treatment satisfaction and health-related quality of life (HRQoL) with topical treatments of actinic keratosis (AK) in routine clinical practice in Denmark and Sweden. Adult patients prescribed field-directed topical AK treatments with diclofenac gel, imiquimod or ingenol mebutate per routine clinical practice were eligible for the observational RAPID-ACT study...
June 29, 2017: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/28656282/aqp3-small-interfering-rna-and-pld2-small-interfering-rna-inhibit-the-proliferation-and-promote-the-apoptosis-of-squamous-cell-carcinoma
#11
Xiaoyong Wang, Chengjun Tao, Chengda Yuan, Jinping Ren, Ming Yang, Hangyu Ying
Aquaporin 3 (AQP3) and phospholipase D2 (PLD2) are abnormally expressed and/or localized in squamous cell carcinoma (SCC). AQP3 transports glycerol to PLD2 for the synthesis of lipid second messenger, which can mediate the effect of the AQP3/PLD2 signaling module in the regulation of keratinocyte proliferation and differentiation. However, the role of the AQP3/PLD2 signaling module in the pathogenesis of SCC remains to be fully elucidated. In the present study, the expression levels of AQP3 and PLD2 in tissue samples were examined using immunohistochemistry, it was found that the expression levels of AQP3 and PLD2 in tissue samples of actinic keratosis (AK), Bowen's disease (BD) and SCC were significantly increased...
August 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28638810/common-malignant-cutaneous-conditions-among-albinos-in-kenya
#12
Seyed Emad Emadi, Andrew Juma Suleh, Farhang Babamahmoodi, Fatemeh Ahangarkani, Vanessa Betty Chelimo, Beatrice Mutai, Seyyed Reza Raeeskarami, Alireza Ghanadan, Seyed Naser Emadi
Background: Albinos in Africa are at constant risk of developing skin cancer due to the damage caused by ultra-violet exposure. This study identifies the common skin conditions among albinos in Kenya as a country located along the equator. Methods: In this descriptive study on albino patients who were admitted to Mbagathi District Hospital in Nairobi, Kenya the census method was used for sampling and a total of 151 albinos were registered. All necessary data including age, gender, type, site and the number of skin lesions were recorded...
2017: Medical Journal of the Islamic Republic of Iran
https://www.readbyqxmd.com/read/28628679/safety-and-efficacy-of-escalating-doses-of-ingenol-mebutate-for-field-treatment-of-actinic-keratosis-on-the-full-face-full-balding-scalp-or-chest
#13
C William Hanke, Brian Berman, Neil Swanson, David M Pariser, Jonathan S Weiss, Michael Bukhalo, Torsten Skov, John Villumsen, Daniel Siegel
<p>Background: Actinic keratosis (AK) can affect large skin areas. Ingenol mebutate (IngMeb) gel (0.015% and 0.05%) is approved for topical treatment of AK in a single contiguous area of ~25 cm2.</p> <p>Objective: The study sought to determine the maximum tolerated dose (MTD), efficacy, and tolerability of IngMeb applied to AK on a contiguous area less than equal to 250 cm2.</p> <p>Methods: Part 1 determined the MTD of IngMeb at 7 concentrations for 2 or 3 days. Part 2 assessed efficacy and tolerability at the MTD and one dose lower for 2 or 3 days vs vehicle...
May 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28628678/assessment-of-efficacy-and-irritation-of-ingenol-mebutate-gel-0-015-used-with-or-without-dimethicone-lotion-for-treatment-of-actinic-keratosis-on-the-face
#14
Shelbi C Jim On, Peter W Hashim, John K Nia, Mark G Lebwohl
<p>Background: Ingenol mebutate gel 0.015% provides high clearance rates for actinic keratosis (AK) on the face and scalp but causes transient local skin responses (LSRs).</p> <p>Objective: This study sought to determine whether the application of 1% dimethicone would decrease ingenol mebutate-associated LSRs and/or affect efficacy during the treatment of multiple AKs on the face.</p> <p>Methods: Ingenol mebutate gel 0.015% was applied for 3 days to two 25 cm2 areas, each containing 3 to 8 AKs on the face of each subject, followed by application of 1% dimethicone lotion in an investigator-blinded manner to one randomly selected AK-containing area until LSRs were no longer present...
May 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28595997/hpv8-field-cancerization-in-a-transgenic-mouse-model-is-due-to-lrig1-keratinocyte-stem-cell-expansion
#15
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/28581227/field-treatment-of-actinic-keratosis-on-the-scalp
#16
C Bower
No abstract text is available yet for this article.
June 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28563677/forearm-skin-aging-characterization-by-instrumental-measurements
#17
Prs Carvalho, J M Sumita, J L M Soares, Sanudo A, Bagatin E
The intrinsic aging and photoaged skin presents biomechanical and morphological differences, which are reflected in the appearance of roughness, superficial and deep wrinkles, atrophy, reduced elasticity, hypo and hyperpigmentation and actinic keratosis OBJECTIVE: To evaluate and compare the characteristics of the flexor (with a predominance of intrinsic aging) and extensor (chronically exposed to sunlight and other environmental factors, with a predominance of photoaging) skin surfaces of the forearms METHODS: Interventional, prospective, diagnostic study, including 23 females, aged over 60 years...
May 31, 2017: International Journal of Cosmetic Science
https://www.readbyqxmd.com/read/28562437/use-of-skin-biopsies-among-dermatologists
#18
David A Weinstein, Sasank Konda, Brett M Coldiron
BACKGROUND: Skin biopsies are essential to establish a diagnosis in many skin diseases. Utilization has been increasing rapidly and represents a significant health care cost. There are no benchmarks or baselines to guide the practice of skin biopsies. OBJECTIVE: To create a reference data set of biopsy behavior among dermatologists. METHODS: Five hundred eighty-eight dermatologists belonging to the American Dermatological Association (ADA) were surveyed...
May 25, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28562195/mhealth-app-for-risk-assessment-of-pigmented-and-nonpigmented-skin-lesions-a-study-on-sensitivity-and-specificity-in-detecting-malignancy
#19
Monique Thissen, Andreea Udrea, Michelle Hacking, Tanja von Braunmuehl, Thomas Ruzicka
BACKGROUND: With the advent of smartphone devices, an increasing number of mHealth applications that target melanoma identification have been developed, but none addresses the general context of melanoma and nonmelanoma skin cancer identification. INTRODUCTION: In this study a smartphone application using fractal and classical image analysis for the risk assessment of skin lesions is systematically evaluated to determine its sensitivity and specificity in the diagnosis of melanoma and nonmelanoma skin cancer along with actinic keratosis and Bowen's disease...
May 31, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28556349/actinic-keratosis-or-maybe-not
#20
D M Caruana, J Millar, C May, D Bilsland
No abstract text is available yet for this article.
May 29, 2017: Clinical and Experimental Dermatology
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