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Basal cell carcinoma, Squamous cell carcinoma

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https://www.readbyqxmd.com/read/29335541/modulation-of-uvb-induced-carcinogenesis-by-activation-of-alternative-dna-repair-pathways
#1
Yan Sha, Vladimir Vartanian, Nichole Owen, Stephanie J Mengden Koon, Marcus J Calkins, Courtney S Thompson, Zahra Mirafzali, Sara Mir, Lisa E Goldsmith, Huaping He, Chun Luo, Scott M Brown, Paul W Doetsch, Andy Kaempf, Jeong Y Lim, Amanda K McCullough, R Stephen Lloyd
The molecular basis for ultraviolet (UV) light-induced nonmelanoma and melanoma skin cancers centers on cumulative genomic instability caused by inefficient DNA repair of dipyrimidine photoproducts. Inefficient DNA repair and subsequent translesion replication past these DNA lesions generate distinct molecular signatures of tandem CC to TT and C to T transitions at dipyrimidine sites. Since previous efforts to develop experimental strategies to enhance the repair capacity of basal keratinocytes have been limited, we have engineered the N-terminally truncated form (Δ228) UV endonuclease (UVDE) from Schizosaccharomyces pombe to include a TAT cell-penetrating peptide sequence with or without a nuclear localization signal (NLS): UVDE-TAT and UVDE-NLS-TAT...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29331035/noninvasive-optical-spectroscopy-for-identification-of-non-melanoma-skin-cancer-pilot-study
#2
David J Carpenter, Mirabelle B Sajisevi, Nikita Chapurin, Clifford Scott Brown, Tracy Cheng, Gregory M Palmer, Daniel S Stevenson, Caroline L Rao, Russell P Hall, Charles R Woodard
OBJECTIVE: Optical spectroscopy offers a noninvasive alternative to biopsy as a first-line screening tool for suspicious skin lesions. This study sought to define several optical parameters across malignant and benign tissue types. STUDY DESIGN: Prospective pilot trial utilizing the Zenalux IM1 optical spectroscopy device from April 2016 to February 2017. For each skin lesion, provider pre-biopsy probability of malignancy was compared to histolopathologic diagnosis...
January 13, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29318704/use-of-antihypertensive-drugs-and-risk-of-keratinocyte-carcinoma-a-meta-analysis-of-observational-studies
#3
Huilin Tang, Shuangshuang Fu, Suodi Zhai, Yiqing Song, Maryam M Asgari, Jiali Han
PURPOSE: Current epidemiologic evidence on the association between antihypertensive drugs and keratinocyte carcinoma (KC) risk is inconsistent. We sought to quantify this association by meta-analysis of observational studies. METHODS: We systematically reviewed observational studies published through August 2016 and reported the KC risk (basal cell carcinoma [BCC] and squamous cell carcinoma [SCC]) associated with antihypertensive drugs, including diuretics, angiotensin-converting enzyme (ACE) inhibitors, angiotensin receptor blockers (ARBs), beta-adrenergic blocking agents (β-blockers), and calcium channel blockers (CCBs)...
January 10, 2018: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/29315147/nonmelanoma-skin-cancer-risk-in-patients-with-inflammatory-bowel-disease-undergoing-thiopurine-therapy-a-systematic-review-of-the-literature
#4
Joshua W Hagen, Melissa A Pugliano-Mauro
BACKGROUND: Azathioprine and 6-mercaptopurine (thiopurines) are common adjunct treatments for inflammatory bowel disease (IBD). Although thiopurine therapy in organ transplant recipients is known to increase nonmelanoma skin cancers (NMSCs), dermatologic literature yields less data regarding NMSC risk of thiopurine use in IBD. OBJECTIVE: The aim of this study was to systematically review current literature on NMSC risk in patients with IBD using thiopurine therapy...
January 8, 2018: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29314288/the-limitations-of-dermoscopy-false-positive-and-false-negative-tumors
#5
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/29306222/superiorly-based-nasolabial-island-flap-for-reconstruction-of-the-lateral-lower-eyelid
#6
Sedat Tatar, Yalçın Yontar, Selahattin Özmen
Background/aim: Various flap procedures have been described and used for the lower eyelids; however, the nasolabial flap is rarely employed. We herein aimed to present the clinical results of using the superiorly based nasolabial island flap for repair of surgical defects extending to the lateral lower eyelid. Materials and methods: Nine patients with a mean age of 62 +- 6 years underwent surgery for reconstruction of the lower eyelid.Results: The diagnosis of lesions was nodular basal-cell carcinoma (n = 5), superficial basal-cell carcinoma (n = 1), well-differentiated squamous-cell carcinoma (n = 1), and basosquamous-cell carcinoma (n = 2)...
December 19, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29301290/non-melanoma-skin-cancer-pathogenesis-overview
#7
REVIEW
Dario Didona, Giovanni Paolino, Ugo Bottoni, Carmen Cantisani
(1) Background: Non-melanoma skin cancer is the most frequently diagnosed cancer in humans. The process of skin carcinogenesis is still not fully understood. However, several studies have been conducted to better explain the mechanisms that lead to malignancy; (2) Methods: We reviewed the more recent literature about the pathogenesis of non-melanoma skin cancer focusing on basal cell carcinomas, squamous cell carcinoma and actinic keratosis; (3) Results: Several papers reported genetic and molecular alterations leading to non-melanoma skin cancer...
January 2, 2018: Biomedicines
https://www.readbyqxmd.com/read/29299592/chemoprevention-of-basal-and-squamous-cell-carcinoma-with-a-single-course-of-fluorouracil-5-cream-a-randomized-clinical-trial
#8
Martin A Weinstock, Soe Soe Thwin, Julia A Siegel, Kimberly Marcolivio, Alexander D Means, Nicholas F Leader, Fiona M Shaw, Daniel Hogan, David Eilers, Susan M Swetter, Suephy C Chen, Sharon E Jacob, Erin M Warshaw, George P Stricklin, Robert P Dellavalle, Navjeet Sidhu-Malik, Nellie Konnikov, Victoria P Werth, Jonette E Keri, Leslie Robinson-Bostom, Robert J Ringer, Robert A Lew, Ryan Ferguson, John J DiGiovanna, Grant D Huang
Importance: Keratinocyte carcinoma (ie, cutaneous basal and squamous cell carcinoma) is the most common cancer in the United States. Objective: To determine whether topical fluorouracil could prevent surgically treated keratinocyte carcinoma. Design, Setting, and Participants: The Veterans Affairs Keratinocyte Carcinoma Chemoprevention Trial was a randomized, double-blind, placebo-controlled trial of topical fluorouracil for chemoprevention of keratinocyte carcinoma...
January 3, 2018: JAMA Dermatology
https://www.readbyqxmd.com/read/29285197/correlation-of-telomere-length-to-malignancy-potential-in-non-melanoma-skin-cancers
#9
Hanae Yamada-Hishida, Yoshimasa Nobeyama, Hidemi Nakagawa
Telomeres are associated with cell fate and aging through their role in the cellular response to stress and growth stimulation resulting from previous cell divisions and DNA damage. Telomere shortening has been observed in most human cancers, and is known to be a feature of malignancy. The aim of this study is to clarify whether telomere length is related to the malignant potential of non-melanoma skin cancers. Telomere length was analyzed using tissue quantitative fluorescence in situ hybridization in 36 non-melanoma skin cancers including basal cell carcinoma (BCC), squamous cell carcinoma (SCC), Bowen's disease (BD) and actinic keratosis (AK), and also in 26 samples of normal-appearing epidermal tissue surrounding or located close to each tumor...
January 2018: Oncology Letters
https://www.readbyqxmd.com/read/29282435/efficient-cancer-detection-using-multiple-neural-networks
#10
John Shell, William D Gregory
The inspection of live excised tissue specimens to ascertain malignancy is a challenging task in dermatopathology and generally in histopathology. We introduce a portable desktop prototype device that provides highly accurate neural network classification of malignant and benign tissue. The handheld device collects 47 impedance data samples from 1 Hz to 32 MHz via tetrapolar blackened platinum electrodes. The data analysis was implemented with six different backpropagation neural networks (BNN). A data set consisting of 180 malignant and 180 benign breast tissue data files in an approved IRB study at the Aurora Medical Center, Milwaukee, WI, USA, were utilized as a neural network input...
2017: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/29282396/carcinoma-cuniculatum-of-the-right-thenar-region-with-bone-involvement-and-lymph-node-metastases
#11
Robert Feldmann, Marlies Wruhs, Tobias Peinhaupt, Alexander Stella, Friedrich Breier, Andreas Steiner
Squamous cell carcinoma (SCC) is the second most common type of skin cancer after basal cell carcinoma (BCC). The overall prevalence of BCC is 3 times higher than that of SCC, but this can vary when looking at specific locations such as the hand, where SCC is much more common than BCC. Carcinoma (or epithelioma) cuniculatum is a rare variant of SCC. It was originally described as a verrucous carcinoma of the soles. Exceptionally, it can arise in other parts of the skin. We report a rare case of carcinoma cuniculatum of the right thenar region with bone and lymph node involvement...
September 2017: Case Reports in Dermatology
https://www.readbyqxmd.com/read/29282394/treatment-of-multiple-actinic-keratosis-and-field-of-cancerization-with-topical-piroxicam-0-8-and-sunscreen-50-in-organ-transplant-recipients-a-series-of-10-cases
#12
Virginia Garofalo, Alessandra Ventura, Sara Mazzilli, Laura Diluvio, Luca Bianchi, Luca Toti, Giuseppe Tisone, Massimo Milani, Elena Campione
Organ transplant recipient (OTR) subjects are at high risk of skin cancer such as squamous cell carcinoma and basal cell carcinoma. Actinic keratosis (AK) is considered the precursor of these non-melanoma skin cancers. Sun protection is mandatory in subjects with AK and this preventive strategy is very important in OTR. Treatment of the field of cancerization is also crucial to reduce the risk of recurrence of skin lesions in AK and non-melanoma skin cancer patients. Activation of cyclooxygenase 1 and 2 enzymes plays an important role in the pathogenesis of skin cancers...
September 2017: Case Reports in Dermatology
https://www.readbyqxmd.com/read/29262420/neoplastic-multifocal-skin-lesions-biology-etiology-and-targeted-therapies-for-nonmelanoma-skin-cancers
#13
Ana R Fernandes, Ana C Santos, Elena Sanchez-Lopez, Andjekla B Kovačević, Marta Espina, Ana C Calpena, Francisco J Veiga, Maria L Garcia, Eliana B Souto
Neoplastic skin lesions are multifocal, diffuse skin infiltrations of particular relevance in the differential diagnosis of ulcerative, nodular, or crusting skin lesions. Nonmelanoma skin cancers (NMSCs), namely, basal cell carcinoma (BCC), squamous cell carcinoma (SCC), and also actinic keratosis (AK), are the most common malignant tumors in humans. BCCs do not proliferate rapidly and most of the times do not metastasize, while SCCs are more infiltrative, metastatic, and destructive. AKs are precursor lesions of cutaneous SCCs...
December 21, 2017: Skin Pharmacology and Physiology
https://www.readbyqxmd.com/read/29261131/histology-of-non-melanoma-skin-cancers-an-update
#14
REVIEW
Giovanni Paolino, Michele Donati, Dario Didona, Santo Raffaele Mercuri, Carmen Cantisani
Non-melanoma skin cancer (NMSC) is the most frequently diagnosed cancer in humans. Several different non-melanoma skin cancers have been reported in the literature, with several histologic variants that frequently cause important differential diagnoses with other cutaneous tumors basal cell carcinoma (BCC) is the most common malignant skin tumor, with different histologic variants that are associated with a greater or less aggressive behavior and that usually may be confused with other primitive skin tumors...
December 20, 2017: Biomedicines
https://www.readbyqxmd.com/read/29249263/reconstructive-methods-in-mohs-micrographic-surgery-in-uruguay-a-bidirectional-descriptive-cohort-analysis
#15
J Navarrete, J Magliano, M Martínez, C Bazzano
BACKGROUND AND OBJECTIVES: The primary goal of Mohs micrographic surgery (MMS) is to completely excise a cancerous lesion and a wide range of reconstructive techniques of varying complexity are used to close the resulting wound. In this study, we performed a descriptive analysis of patients who underwent MMS, with a focus on wound closure methods. MATERIAL AND METHODS: We conducted a bidirectional descriptive cohort analysis of all MMS procedures performed by a single surgeon between November 2013 and April 2016...
December 14, 2017: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/29246825/mohs-micrographic-surgery-and-dermatopathology-concordance-an-analysis-of-1421-mohs-cases-over-17-years
#16
Katarina Kesty, Omar P Sangueza, Barry Leshin, John G Albertini
BACKGROUND: The success of Mohs micrographic surgery depends on the surgeon's ability to correctly interpret intraoperative frozen sections. OBJECTIVE: This retrospective study analyzed the rate of concordance between Mohs surgeons and dermatopathologists in reading slides from Mohs surgery cases. METHODS: A dermatopathologist reviewed all the frozen sections and the corresponding Mohs map for every 30th Mohs case at a practice employing 6 different Mohs surgeons from 2001-2017...
December 12, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/29235520/ubiquitin-conjugating-enzyme-e2t-ube2t-and-denticleless-protein-homolog-dtl-are-linked-to-poor-outcome-in-breast-and-lung-cancers
#17
Javier Perez-Peña, Verónica Corrales-Sánchez, Eitan Amir, Atanasio Pandiella, Alberto Ocana
Protein ubiquitination and degradation represent druggable vulnerabilities of cancer cells. We used gene expression and functional annotation analyses to identify genes in the ubiquitin pathway which are differentially expressed between normal breast and basal-like tumors. With this approach we identified 16 ubiquitin related genes overexpressed in basal-like breast cancers compared with normal breast. We then explored the association between these genes and outcomes using the KMPlotter online tool. Two genes, the ubiquitin-conjugating enzyme E2T (UBE2T) and the denticleless protein homolog (DTL) were overexpressed and linked with detrimental outcome in basal-like and luminal breast cancer patients...
December 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29232032/erosive-pustular-dermatosis-of-the-scalp-reappraisal-of-an-underrecognized-entity
#18
REVIEW
Michael Wilk, Bettina G Zelger, Undine Hauser, Reinhard Höpfl, Bernhard Zelger
Erosive pustular dermatosis of the scalp (EPDS) is an inflammatory dermatosis of unknown etiology. Herein, we present a review of the disease and report our own clinical and histopathological experience in eleven patients. EPDS tends to spontaneously affect bald areas of the scalp in elderly individuals. A history of previous surgery at the same site - as observed in four of our patients - is common. Coronary artery disease, cerebrovascular insult, arterial hypertension, diabetes mellitus, and severe cases of cancer were frequent comorbidities...
December 12, 2017: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/29222862/photocytotoxic-copper-ii-complexes-with-schiff-base-scaffolds-for-photodynamic-therapy
#19
Rong-Kai Lin, Chin-I Chiu, Cho-Han Hsu, Ying-Ju Lai, Parthiban Venkatesan, Po-Han Huang, Ping-Shan Lai, Chu-Chieh Lin
Photodynamic therapy (PDT) is a promising and minimally invasive method for the treatment of superficial diseases, and photosensitizers with high phototoxicity indexes (defined as (IC50Dark)/(IC50Irridation)) are essential for the development of ideal photosensitizing properties for this technology. In this study, a series of photocytotoxic copper(II) complexes [Cu(RQYMP)(dppn)] (QYMP = NNO-tridentate Schiff base derivatives, dppn = benzo[i]dipyrido[3,2-a;2´,3´-c]-phenazine) were reported, with their respective structural confirmations by mass spectrometry and FTIR spectroscopy...
December 9, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29218279/non-metastatic-non-melanoma-skin-cancers-our-3-years-of-clinical-experiences
#20
Elif Sari
BACKGROUND: Nonmelanoma skin cancers (NMSC) constitute the largest group of skin cancers. In this study, NMSCs were analyzed retrospectively. METHODS: Between June 2013 and March 2017, demographics and comorbidities of patients underwent reconstructive surgery for NMSC; their risk factors, types, diameters, differentiation, localizations, follow-up times, treatment methods and complications were compared and statistically analyzed. RESULTS: Totally, 163 tumors [111 basal cell carcinoma and 52 cutaneous squamous cell carcinoma (cSCC)] were excized from 148 patients (63 females, 85 males)...
September 2017: World Journal of Plastic Surgery
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