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https://www.readbyqxmd.com/read/29785332/dermoscopic-changes-in-melanocytic-nevi-covered-with-both-opaque-tape-and-sunscreen-cream-during-narrowband-ultraviolet-b-therapy
#1
Derya Ök Kekeç, Nida Kaçar, Işıl Kılınç Karaarslan
Background: Ultraviolet (UV) light may cause dermoscopic changes on melanocytic nevi (MN). Objectives: To investigate the effects of sunscreen cream (SSc) application on dermoscopic changes in MN during narrowband UVB (NBUVB) therapy. Methods: Half of the randomly selected MN in each patient were covered with opaque tape and SSc [SSc(+)], and the rest were covered with only opaque tape [SSc(-)] during NBUVB treatment sessions. Results: More SSc(-) MN displayed dermoscopic changes at end of NBUVB therapy compared to the start of therapy (p=0...
April 2018: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/29785330/dermoscopy-of-a-spark-s-nevus
#2
Giovanni Biondo, Matteo Gnone, Simona Sola, Carlotta Pastorino, Cesare Massone
Spark's nevus is a particular type of melanocytic nevus that on histology shows features of both Spitz's and Clark's nevus. Clinically, it is an asymmetric, irregular, multicolored, pigmented lesion that is not clearly distinguishable from melanoma or dysplastic (Clark's) nevus. Dermoscopic features have not been described yet, and one could speculate that they are similar to those of Clark's nevi because the histopathologic architecture of Spark's nevus is similar to that of a Clark's nevus, resembling Spitz's nevi in the epithelioid morphology of melanocytes...
April 2018: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/29785326/morphologic-characteristics-of-nevi-associated-with-melanoma-a-clinical-dermatoscopic-and-histopathologic-analysis
#3
Temeida Alendar, Harald Kittler
Background: The aim of this retrospective study was to determine the frequency of nevus-associated melanomas and to better characterize the preexisting nevus from a histopathologic, clinical and dermatoscopic point of view. Methods: We reviewed the histopathologic slides of a consecutive series of 357 melanomas and corresponding clinical and dermatoscopic images, if available. Results: We found that 31 (8.7%) melanomas were associated with a preexisting nevus, 284 (79...
April 2018: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/29785325/screening-for-malignant-melanoma-a-critical-assessment-in-historical-perspective
#4
Wolfgang Weyers
Screening for melanoma has been advocated for many years because early detection and excision have been regarded as the most important measure to lower mortality from that neoplasm. In the past decade, concern has been raised by epidemiologists that screening might result in excision chiefly of "inconsequential cancer," i.e., melanomas that would never have progressed into life-threatening tumors, a phenomenon referred to by the misleading term "overdiagnosis." Without any firm evidence, that speculation has been embraced worldwide, and incipient melanomas have been trivialized...
April 2018: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/29782304/role-of-in-vivo-reflectance-confocal-microscopy-in-the-analysis-of-melanocytic-lesions
#5
Elena-Daniela Serban, Francesca Farnetani, Giovanni Pellacani, Maria Magdalena Constantin
Worldwide melanoma incidence and mortality are increasing (1). Despite the ongoing research, advanced melanoma is still incurable; therefore, the most appropriate solution seems to be early detection combined with complete surgical excision (2). Since the diagnostic protocol of suspicious lesions includes a complete excision with safety margins (2), the problem of unnecessary scarring is significant. The real challenge in this case is to have a properly formulated diagnosis before acquiring a biopsy. Currently available non-invasive techniques are coherence tomography, digital dermoscopy, and reflectance confocal microscopy...
April 2018: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/29780659/confocal-microscopy-in-skin-cancer
#6
REVIEW
Verena Ahlgrimm-Siess, Martin Laimer, Harold S Rabinovitz, Margaret Oliviero, Rainer Hofmann-Wellenhof, Ashfaq A Marghoob, Alon Scope
Purpose of Review: Reflectance confocal microscopy (RCM) enables imaging of skin lesions at cellular level resolution at the bedside (in vivo) or in freshly excised tissue (ex vivo). This article provides an overview of strengths and limitations of non-invasive RCM in skin cancer diagnosis. Recent Findings: RCM features of common melanocytic and non-melanocytic skin neoplasms such as melanoma, actinic keratosis/squamous cell carcinoma, basal cell carcinoma, and nevi have been well defined and show good correlation with dermoscopic and histopathologic findings...
2018: Current Dermatology Reports
https://www.readbyqxmd.com/read/29775633/braf-v600e-mutations-in-nevi-and-melanocytic-tumors-of-uncertain-malignant-potential-meltumps
#7
Ruth Seitz-Alghrouz, Jose Villacorta Hidalgo, Claudia Kayser, Clemens Kreutz, Kristin Technau-Hafsi, Carlos Diaz, Andreas von Deimling, Jens Timmer, Martin Werner, Miroslav Malkovsky, Paul Fisch
No abstract text is available yet for this article.
May 15, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29774360/histologic-mimics-of-malignant-melanoma
#8
Caroline Bsirini, Bruce R Smoller
Although spongiotic (eczematous), psoriatic and cutaneous skin infections are among the most common dermatology consultations, melanocytic lesions - including the different types of nevi and melanomas - are among those that cause a great deal of concern and stress to patients and their clinicians. A diagnosis of benign melanocytic nevus carries a very good prognosis. However, a diagnosis of melanoma might imply more aggressive treatment, lifelong surveillance and a worse prognosis. Differentiating between these conditions is not always a straightforward process for clinicians and pathologists...
May 18, 2018: Singapore Medical Journal
https://www.readbyqxmd.com/read/29771688/plexiform-atypical-spitz-tumor-with-rosette-like-giant-cells-a-histologic-and-immunohistochemical-study-on-a-case-suggesting-ganglioneuroblastic-differentiation-review-of-the-literature-and-considerations-on-histogenesis
#9
Elena Castelli, Elisabetta Orlando, Giuseppe Pistone, Maria R Bongiorno
Spitz nevi, atypical Spitz tumors and Spitzoid melanoma, the three clinicopathologic forms that constitute the spectrum of the Spitz-type melanocytic lesions, share a histologic picture characterized by large spindle and/or epithelioid ganglion-like cells, with various admixtures of multinucleate bizarre cells. This remarkable cytology has always been interpreted as an unusual, as well as unexplained form of atypia. We report a case of atypical Spitz tumor with Homer Wright-like rosettes, a feature characteristic of ganglioneuroblastic proliferation...
May 16, 2018: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/29760971/quantitative-characterization-of-turbidity-by-radiative-transfer-based-reflectance-imaging
#10
Peng Tian, Cheng Chen, Jiahong Jin, Heng Hong, Jun Q Lu, Xin-Hua Hu
A new and noncontact approach of multispectral reflectance imaging has been developed to inversely determine the absorption coefficient of μ a , the scattering coefficient of μs and the anisotropy factor g of a turbid target from one measured reflectance image. The incident beam was profiled with a diffuse reflectance standard for deriving both measured and calculated reflectance images. A GPU implemented Monte Carlo code was developed to determine the parameters with a conjugate gradient descent algorithm and the existence of unique solutions was shown...
May 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29760567/mir-497-5p-mir-195-5p-and-mir-455-3p-function-as-tumor-suppressors-by-targeting-htert-in-melanoma-a375-cells
#11
Li Chai, Xiao-Jing Kang, Zhen-Zhu Sun, Ming-Feng Zeng, Shi-Rong Yu, Yuan Ding, Jun-Qin Liang, Ting-Ting Li, Juan Zhao
Background: hTERT gene plays an important role in melanoma, although the specific mechanism involved is unclear. The aim of this study was to screen and identify the relative miRNAs with the regulation of hTERT in melanoma. Materials and methods: Quantitative real-time polymerase chain reaction (q-PCR) and immunohistochemistry were performed to detect hTERT mRNA and protein expression in 36 formalin-fixed paraffin-embedded melanoma tissues and 36 age- and sex-matched pigmented nevi cases, respectively...
2018: Cancer Management and Research
https://www.readbyqxmd.com/read/29752800/raman-biophysical-markers-in-skin-cancer-diagnosis
#12
Xu Feng, Austin J Moy, Hieu T M Nguyen, Yao Zhang, Jason Zhang, Matthew C Fox, Katherine R Sebastian, Jason S Reichenberg, Mia K Markey, James W Tunnell
Raman spectroscopy (RS) has demonstrated great potential for in vivo cancer screening; however, the biophysical changes that occur for specific diagnoses remain unclear. We recently developed an inverse biophysical skin cancer model to address this issue. Here, we presented the first demonstration of in vivo melanoma and nonmelanoma skin cancer (NMSC) detection based on this model. We fit the model to our previous clinical dataset and extracted the concentration of eight Raman active components in 100 lesions in 65 patients diagnosed with malignant melanoma (MM), dysplastic nevi (DN), basal cell carcinoma, squamous cell carcinoma, and actinic keratosis...
May 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29742191/gene-expression-analysis-differentiates-melanomas-from-spitz-nevi
#13
Burkhard Jansen, Doyle Hansen, Ronald Moy, Maesa Hanhan, Zuxu Yao
INTRODUCTION: Pediatric Spitz nevi can pose significant diagnostic challenges to both clinicians and dermatopathologists when the current image-recognition based gold standard is employed. PRAME (preferentially expressed antigen in melanoma) and/or LINC (long intergeneic non-coding RNA 518) gene expression in adult patients in samples obtained non-invasively via adhesive patches differentiates primary melanomas from atypical nevi and other pigmented lesions with a NPV of over 99%, a sensitivity of 91%, and a specificity of 69%, to help clinicians rule out melanoma and the need for surgical biopsies of atypial pigmented lesions with suspicion for melanoma...
May 1, 2018: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29741410/management-of-resistant-halo-nevi
#14
Sherif S Awad, Rasha Ta Abdel Aziz, Sahar S Mohammed
BACKGROUND: Halo nevus (HN) is a rare dermatologic disorder characterized by typical whitish rim surrounding an existing melanocytic nevus resembling halo. It is a cosmetic problem that may be linked to vitiligo, and it is advised to remove these nevi in order to avoid development of vitiligo. OBJECTIVES: The aim of the present study is to evaluate the cosmetic outcome after nevus removal and leukoderma dermabrasion with epithelial graft followed by narrow-band ultraviolet B (NB-UVB) phototherapy as management of resistant halo nevi and avoidance of development of vitiligo...
May 9, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29736211/therapeutic-effects-of-targeting-ras-erk-signaling-in-giant-congenital-melanocytic-nevi
#15
Qingxiong Yu, Min Wu, Lingling Sheng, Qingfeng Li, Feng Xie
Most giant congenital melanocytic nevi (GCMN) exhibit an activating mutation in NRAS. Constitutive activation of the RAS-ERK signaling pathway induces proliferation in nevus cells and plays a pivotal role in melanoma development. In this study, we studied the efficacy of RAS-ERK pathway targeted therapy in GCMN. We isolated nevus cells from GCMN (GNCs) and compared the morphology of GNCs with normal melanocytes and the A375 melanoma cell line. Proliferation curves of GNCs and A375 cells were determined using Cell Counting Kit-8 assays...
2018: American Journal of Translational Research
https://www.readbyqxmd.com/read/29734747/visible-and-extended-near-infrared-multispectral-imaging-for-skin-cancer-diagnosis
#16
Laura Rey-Barroso, Francisco J Burgos-Fernández, Xana Delpueyo, Miguel Ares, Santiago Royo, Josep Malvehy, Susana Puig, Meritxell Vilaseca
With the goal of diagnosing skin cancer in an early and noninvasive way, an extended near infrared multispectral imaging system based on an InGaAs sensor with sensitivity from 995 nm to 1613 nm was built to evaluate deeper skin layers thanks to the higher penetration of photons at these wavelengths. The outcomes of this device were combined with those of a previously developed multispectral system that works in the visible and near infrared range (414 nm⁻995 nm). Both provide spectral and spatial information from skin lesions...
May 5, 2018: Sensors
https://www.readbyqxmd.com/read/29718885/orofacial-signs-and-dental-abnormalities-in-patients-with-mulvihill-smith-syndrome-a-literature-review-on-this-rare-progeroid-pathology
#17
REVIEW
Pier Carmine Passarelli, Guido Pasquantonio, Paolo Francesco Manicone, Loredana Cerroni, Roberta Condo', Manuele Mancini, Antonio D'Addona
BACKGROUND: Mulvihill-Smith syndrome is a rare sporadic condition that was first recognized in 1975. A total of 11 cases have been described in the literature. The aim of this study was to describe the orofacial signs and dental anomalies, their frequency, and the relationship between Mulvihill-Smith syndrome and other progeroid syndromes via a review of the literature. METHODS: A systematic PubMed search was performed to retrieve articles published between 1975 and the present day that described patients affected by Mulvihill-Smith syndrome...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29717920/retrospective-study-on-laser-treatment-of-oral-vascular-lesions-using-the-leopard-technique-the-multiple-spot-irradiation-technique-with-a-single-pulsed-wave
#18
Hidetaka Miyazaki, Takafumi Ohshiro, Umberto Romeo, Tadahide Noguchi, Yutaka Maruoka, Gianfranco Gaimari, Georgi Tomov, Yoshitaka Wada, Kae Tanaka, Toshio Ohshiro, Shinichi Asamura
OBJECTIVE: This study aimed to retrospectively evaluate the efficacy and safety of laser treatment of oral vascular lesions using the multiple spot irradiation technique with a single-pulsed wave. BACKGROUND DATA: In laser therapy for vascular lesions, heat accumulation induced by excessive irradiation can cause adverse events postoperatively, including ulcer formation, resultant scarring, and severe pain. To prevent heat accumulation and side effects, we have applied a multiple pulsed spot irradiation technique, the so-called "leopard technique" (LT) to oral vascular lesions...
May 2, 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29710538/mir-338-5p-promotes-the-growth-and-metastasis-of-malignant-melanoma-cells-via-targeting-cd82
#19
Jianwen Long, Jing Luo, Xuwen Yin
BACKGROUND: Melanoma has been a severe threat to human health, microRNAs play vital roles in the oncogenesis and progression of cancers. In this report, the roles and mechanism of miR-338-5p were investigated in the development of melanoma. MATERIALS AND METHODS: A total of 46 melanoma samples and 25 normal nevi samples were collected. Real time reverse transcriptase polymerase chain reaction and Western blot were used to detect the expression of mRNA and protein...
April 6, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29707138/enhanced-intratumoral-expression-of-rnf2-is-a-favorable-prognostic-factor-for-patients-with-cutaneous-melanoma
#20
Łukasz Kuźbicki, Dariusz Lange, Agata Stanek-Widera, Agnieszka Glińska, Barbara W Chwirot
Recent studies involving melanoma cell lines suggest that enhanced expression of epigenetic regulator RNF2 supports proliferation and promotes metastasis. However, it is not clear to what extent those data apply to disease progression and prognosis for melanoma patients. Therefore the aim of the present study was to assess the prognostic power of RNF2 intratumoral expression by melanoma cells. RNF2 was detected immunohistochemically in standard formalin-fixed paraffin-embedded samples of 9 benign nevi, 60 melanomas and 24 nodal metastases...
April 3, 2018: Oncotarget
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