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Solar keratosis

Adrian Alegre-Sanchez, Natalia Jiménez-Gómez, Óscar M Moreno-Arrones, Pablo Fonda-Pascual, Bibiana Pérez-García, Pedro Jaén-Olasolo, Pablo Boixeda
The novel picosecond lasers, initially developed for faster tattoo removal, have also shown great efficacy in endogenous pigmentary disorders. To describe the efficacy and safety profile of an alexandrite (755-nm) picosecond laser in a wide range of pigmented flat and elevated cutaneous lesions. A retrospective study was performed in which we collected all the clinical images of patients treated with the 755-nm alexandrite picosecond laser for 12 months (November 2016-November 2017). Clinical features were obtained from their medical charts...
February 9, 2018: Lasers in Medical Science
Sonal Muzumdar, Melissa Argraves, Arni Kristjansson, Katalin Ferenczi, Soheil S Dadras
Histologic differentiation of melanoma in situ (MIS) from solar keratosis on chronically sun-damaged skin is challenging. The first-line immunostain is usually MART-1/Melan-A, which can exaggerate the epidermal melanocytes, causing a diagnostic pitfall for MIS. By comparing MART-1 and SOX10 immunostaining, we scored the percentage of epidermal melanocytes per 2-mm diameter fields in pigmented actinic keratosis (n=16), lichenoid keratosis (n=7), junctional melanocytic nevus (n=6), keratosis with atypical melanocytic proliferation (AMP, n=17) and MIS (n=10)...
January 26, 2018: Journal of Cutaneous Pathology
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
Maria Concetta Fargnoli, Gianfranco Altomare, Elisa Benati, Francesco Borgia, Paolo Broganelli, Anna Carbone, Sergio Chimenti, Sergio Donato, Giampiero Girolomoni, Giuseppe Micali, Erica Moggio, Aurora Parodi, Stefano Piaserico, Giuseppe Pistone, Concetta Potenza, Mario Puviani, Margherita Raucci, Sabina Vaccari, Stefano Veglio, Andrea Zanca, Ketty Peris
Actinic keratosis (AK) is a common keratinocyte intra-epidermal neoplasia. To assess AK prevalence and potential risk factors in patients attending Italian general dermatology clinics. This retrospective study was conducted on clinical data from consecutive white outpatients aged ≥30 years, attending 24 general dermatology clinics between December 2014 and February 2015. AK prevalence (entire population) and multivariate risk factor analysis (patients with current/previous AK and complete data) are presented...
December 1, 2017: European Journal of Dermatology: EJD
F Persechino, N De Carvalho, S Ciardo, B De Pace, A Casari, J Chester, S Kaleci, I Stanganelli, C Longo, F Farnetani, G Pellacani
Pigmented facial macules are common on sun damage skin. The diagnosis of early stage lentigo maligna (LM) and lentigo maligna melanoma (LMM) is challenging. Reflectance confocal microscopy (RCM) has been proven to increase diagnostic accuracy of facial lesions. A total 154 pigmented facial macules, retrospectively collected, were evaluate for the presence of already described RCM features and new parameters depicting aspects of the follicle . Melanocytic nests, roundish pagetoid cells, follicular infiltration, bulgings from the follicles and many bright dendrites, and infiltration of the hair follicle (i...
December 22, 2017: Experimental Dermatology
Andrés Már Erlendsson
Non-melanoma skin cancer is the most frequently occurring cancer in Caucasians today. Incidence rates in Europe have increased steadily since the 1960s and more than tripled over the last 50 years. Despite primary preventative efforts, incidences of non-melanoma skin cancer continue to rise and development of effective chemopreventative strategies is needed. In 2013, ingenol mebutate was approved in Denmark as a new topical drug for field-directed treatment for actinic keratoses. Ingenol mebutate has a dual mechanism of action, causing initial cell death, followed by an immune activation...
November 2017: Danish Medical Journal
A Mizrahi, A Barzilai, D Gur-Wahnon, I Z Ben-Dov, S Glassberg, T Meningher, E Elharar, M Masalha, J Jacob-Hirsch, H Tabibian-Keissar, I Barshack, J Roszik, R Leibowitz-Amit, Y Sidi, D Avni
Skin carcinogenesis is known to be a multi-step process with several stages along its malignant evolution. We hypothesized that transformation of normal epidermis to cutaneous squamous cell carcinoma (cSCC) is causally linked to alterations in microRNAs (miRNA) expression. For this end we decided to evaluate their alterations in the pathologic states ending in cSCC. Total RNA was extracted from formalin fixed paraffin embedded biopsies of five stages along the malignant evolution of keratinocytes towards cSCC: Normal epidermis, solar elastosis, actinic keratosis KIN1-2, advanced actinic keratosis KIN3 and well-differentiated cSCC...
September 18, 2017: Oncogene
Philipp Tschandl, Alessio Gambardella, Amélie Boespflug, Teresa Deinlein, Vincenzo de Giorgi, Harald Kittler, Aimilios Lallas, Josep Malvehy, Elvira Moscarella, Susana Puig, Massimiliano Scalvenzi, Luc Thomas, Iris Zalaudek, Roberto Alfano, Giuseppe Argenziano
Facial melanoma is difficult to diagnose and dermatoscopic features are often subtle. Dermatoscopic non-melanoma patterns may have a comparable diagnostic value. In this pilot study, facial lesions were collected retrospectively, resulting in a case set of 339 melanomas and 308 non-melanomas. Lesions were evaluated for the prevalence (> 50% of lesional surface) of 7 dermatoscopic non-melanoma features: scales, white follicles, erythema/reticular vessels, reticular and/or curved lines/fingerprints, structureless brown colour, sharp demarcation, and classic criteria of seborrhoeic keratosis...
August 1, 2017: Acta Dermato-venereologica
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
D Maor, C Ondhia, L L Yu, J J Chan
Lichenoid keratosis (LK), also known as benign lichenoid keratosis or lichen planus-like keratosis, is a solitary, pink to red-brown scaly plaque representing a host immunological response to a variety of precursor lesions. LK is often misdiagnosed as a dermatological malignancy owing to its clinical resemblance to basal cell carcinoma (BCC) or Bowen disease. We performed a retrospective analysis of the pathology records of a series of LK lesions with reference to the demographic features and accuracy of clinical diagnosis...
August 2017: Clinical and Experimental Dermatology
Giorgio Annessi, Riccardo Bono, Damiano Abeni
BACKGROUND: The clinical and dermoscopic differentiation between lentigo maligna (LM) and solar lentigo (SL)/initial seborrheic keratosis (SK) may be difficult. OBJECTIVE: Our aim was to identify digital epiluminescence microscopy (DELM)-specific criteria that can be helpful in distinguishing LM from SL/SK and to propose a new model of LM dermoscopic progression based on a study of DELM-histopathological correlation. METHODS: A total of 167 consecutive doubtful pigmented lesions of the head (105 LM and 62 SL/SK) were studied...
February 2017: Journal of the American Academy of Dermatology
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
Ruzica Z Conic, Karl Napekoski, Heidi Schuetz, Melissa Piliang, Wilma Bergfeld, Natasha Atanaskova Mesinkovska
BACKGROUND: Seborrheic keratoses (SK) are common skin neoplasms considered to be benign. Reports of associated squamous cell carcinoma arising within seborrheic keratosis (SCC-SK) have been described. OBJECTIVE: To describe the histopathologic characteristics of SCC-SK and identify predisposing factors in formation of these rare lesions. METHODS: There were 162 cases of SCC-SK in a span of a decade (2003-2014). All of the histopathologic specimens and medical records were reviewed...
June 2017: Journal of the American Academy of Dermatology
Z J Wolner, A A Marghoob, M P Pulitzer, M A Postow, M A Marchetti
Pembrolizumab is an immune checkpoint inhibitor that targets the programmed cell death (PD)-1 receptor. Common cutaneous adverse side-effects of PD-1 inhibitors include maculopapular rash, pruritus, vitiligo and lichenoid skin and mucosal reactions. Here we describe a man in his sixties with metastatic melanoma treated with pembrolizumab who subsequently developed fading or disappearance of pigmented skin lesions, lightening of the skin, and poliosis of the eyebrows, eyelashes and scalp and body hair. Compared with baseline high-resolution three-dimensional total-body photography, we observed fading or disappearance of solar lentigines, seborrhoeic keratoses and melanocytic naevi, suggesting that PD-1 inhibitors may affect the evolution of these benign skin lesions...
January 2018: British Journal of Dermatology
Hiroyuki Yamamoto, Joohyun Ryu, Eli Min, Naomi Oi, Ruihua Bai, Tatyana A Zykova, Dong Hoon Yu, Kenji Moriyama, Ann M Bode, Zigang Dong
TRAF1 is a member of the TRAF protein family, which regulates the canonical and noncanonical NF-κB signaling cascades. Although aberrant TRAF1 expression in tumors has been reported, the role of TRAF1 remains elusive. Here, we report that TRAF1 is required for solar UV-induced skin carcinogenesis. Immunohistochemical analysis showed that TRAF1 expression is up-regulated in human actinic keratosis and squamous cell carcinoma. In vivo studies indicated that TRAF1 expression levels in mouse skin are induced by short-term solar UV irradiation, and a long-term skin carcinogenesis study showed that deletion of TRAF1 in mice results in a significant inhibition of skin tumor formation...
June 2017: Journal of Investigative Dermatology
Monica Boen, Monique J Vanaman Wilson, Mitchel P Goldman, Douglas C Wu
OBJECTIVE: The male scalp undergoes extensive photodamage due to a high prevalence of androgenic alopecia and exposure to ultraviolet radiation. This photodamage presents as solar lentigines, fine rhytides, and keratosis, and can prematurely age a patient. In this study, we demonstrate the safety and efficacy of the fractionated 1,927 nm thulium fiber laser using high density and high energy settings to achieve rejuvenation of the male scalp after a single treatment session. METHODS: Four male patients with Fitzpatrick skin types II-III and extensive photodamage on the scalp underwent one treatment with the fractional non-ablative 1,927 nm thulium fiber laser...
July 2017: Lasers in Surgery and Medicine
Jeanne McFalls, Lauren Okon, Sarah Cannon, Jason B Lee
Intradepidermal proliferation of Merkel cells without any dermal component has been interpreted as either a hyperplastic process secondary to chronic ultraviolet radiation or a neoplastic process, namely Merkel cell carcinoma (MCC) in situ. The recent criteria that have been proffered to diagnose MCC in situ, unfortunately, are identical to those that have been applied to Merkel cell hyperplasia in the past, posing a diagnostic quandary when faced with an intraepidermal proliferation of Merkel cells. Most previously reported cases of MCC in situ have occurred within associated epithelial lesion that includes solar (actinic) keratosis and squamous-cell carcinoma in situ...
May 2017: Journal of Cutaneous Pathology
Lawrence Fitzgerald Kuklinski, Michael Scot Zens, Ann E Perry, Adele C Green, Margaret R Karagas
BACKGROUND: Skin microtopography as a measure of photoaging is a noninvasive approach to measuring chronic ultraviolet radiation exposure and reflects the degree of dermal elastosis in populations of European descent in the subtropics. Less is known about the utility of this approach in populations at different latitudes, and whether it relates to skin cancer risk. METHODS: A population-based case-control study of 342 squamous cell carcinoma (SCC) cases and 331 age- and gender-matched controls were evaluated for histologic evidence of solar damage and severity of photoaging based on microtopography on a six-grade scale...
January 2017: Photodermatology, Photoimmunology & Photomedicine
Jaroslav Janda, Nichole B Burkett, Karen Blohm-Mangone, Vivian Huang, Clara Curiel-Lewandrowski, David S Alberts, Emanuel F Petricoin, Valerie S Calvert, Janine Einspahr, Zigang Dong, Ann M Bode, Georg T Wondrak, Sally E Dickinson
Cutaneous exposure to solar ultraviolet (UV) radiation is a major causative factor in skin carcinogenesis, and improved molecular strategies for efficacious chemoprevention of nonmelanoma skin cancer (NMSC) are urgently needed. Toll-like receptor 4 (TLR4) signaling has been shown to drive skin inflammation, photoimmunosuppression, and chemical carcinogenesis. Here we have examined the feasibility of genetic and pharmacological antagonism targeting cutaneous TLR4 for the suppression of UV-induced NF-κB and AP-1 signaling in keratinocytes and mouse skin...
November 2016: Photochemistry and Photobiology
Naoki Oiso, Tomohiko Narita, Akira Kawada
No abstract text is available yet for this article.
February 1, 2017: European Journal of Dermatology: EJD
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