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Melanoma in situ

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https://www.readbyqxmd.com/read/29240581/cutaneous-melanocytoma-with-crtc1-trim11-fusion-report-of-5-cases-resembling-clear-cell-sarcoma
#1
Lucie Cellier, Emilie Perron, Daniel Pissaloux, Marie Karanian, Veronique Haddad, Laurent Alberti, Arnaud de la Fouchardière
We report 5 cases of primary intradermal nodular unpigmented tumors with a melanocytic immunophenotype associated with a novel CRTC1-TRIM11 fusion. Clinically, the cutaneous nodules were slowly growing in 3 women and 2 men (25 to 82 y old, median, 28 y) with no specific topography. Lesion size ranged from 4 to 12 mm (median, 5 mm). The tumors were strictly located in the dermis with a nodular pattern. The cells were arranged in confluent nests and fascicules. Central fibronecrotic areas were present in 2 cases...
December 7, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29230879/microrna-143-5p-regulates-alpaca-melanocyte-migration-proliferation-and-melanogenesis
#2
Kaiyuan Ji, Pengqian Zhang, Junzhen Zhang, Ruiwen Fan, Yu Liu, Shanshan Yang, Shuaipeng Hu, Xuexian Liu, Changsheng Dong
microRNAs (miRNAs) have been shown to be closely involved in the control of melanogenesis and hair colour in mammals. Previous data also indicate that miR-143 regulates cell growth in melanoma. Here, we aimed to investigate the role of miR-143-5p in alpaca melanocytes. We found that miR-143-5p was highly expressed in the cytoplasm of alpaca melanocytes as demonstrated by an in situ hybridization assay. Prediction analysis revealed that miR-143-5p could regulate TGF-β-activated kinase 1 (TAK1) expression, which we confirmed by luciferase reporter assay, indicating that miR-143-5p controls TAK1 expression by directly targeting its 3' untranslated region (UTR)...
December 11, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/29203786/antigen-specific-oncolytic-mv-based-tumor-vaccines-through-presentation-of-selected-tumor-associated-antigens-on-infected-cells-or-virus-like-particles
#3
Stefan Hutzler, Stephanie Erbar, Robert A Jabulowsky, Jan R H Hanauer, Jürgen H Schnotz, Tim Beissert, Bianca S Bodmer, Regina Eberle, Klaus Boller, Thorsten Klamp, Ugur Sahin, Michael D Mühlebach
Recombinant vaccine strain-derived measles virus (MV) is clinically tested both as vaccine platform to protect against other pathogens and as oncolytic virus for tumor treatment. To investigate the potential synergism in anti-tumoral efficacy of oncolytic and vaccine properties, we chose Ovalbumin and an ideal tumor antigen, claudin-6, for pre-clinical proof of concept. To enhance immunogenicity, both antigens were presented by retroviral virus-like particle produced in situ during MV-infection. All recombinant MV revealed normal growths, genetic stability, and proper expression and presentation of both antigens...
December 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29195800/nir-triggered-liposome-gold-nanoparticles-entrapping-curcumin-as-in-situ-adjuvant-for-photothermal-treatment-of-skin-cancer
#4
Surya Prakash Singh, Syed Baseeruddin Alvi, Deepak Bharadwaj, Anula Divyash Singh, Sasidhar Venkata Manda, Rohit Srivastava, Aravind Kumar Rengan
We report the synthesis of a biodegradable liposome gold nanoparticles for curcumin (Au-Lipos Cur NPs) delivery. This entrapped curcumin served as an in situ adjuvant for photothermal therapy. Curcumin was loaded in Au-Lipos NPs with an encapsulation efficiency of ∼70%. The gold coating enabled the NPs to specifically absorb NIR light (780nm) by virtue of Surface Plasmon Resonance (SPR) and this light energy was converted to heat. The generated heat destabilized the liposomal core enhancing the release of encapsulated curcumin...
November 28, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29180473/new-mechanisms-of-resistance-to-mek-inhibitors-in-melanoma-revealed-by-intravital-imaging
#5
Hailey E Brighton, Steven P Angus, Tao Bo, Jose Roques, Alicia C Tagliatela, David Darr, Kubra Karagoz, Noah Sciaky, Michael Gatza, Norman E Sharpless, Gary L Johnson, James E Bear
Targeted therapeutics that are initially effective in cancer patients nearly invariably engender resistance at some stage, an inherent challenge in the use of any molecular targeted drug in cancer settings. In this study, we evaluated resistance mechanisms arising in metastatic melanoma to MAPK pathway kinase inhibitors, as a strategy to identify candidate strategies to limit risks of resistance. To investigate longitudinal responses, we developed an intravital serial imaging approach that can directly visualize drug response in an inducible RAF-driven, autochthonous murine model of melanoma incorporating a fluorescent reporter allele (tdTomatoLSL)...
November 27, 2017: Cancer Research
https://www.readbyqxmd.com/read/29178539/non-melanoma-hutchinson-s-sign-a-reappraisal-of-this-important-remarkable-melanoma-simulant
#6
L Robert Baran, Beth S Ruben, Paul Kechijian, Luc Thomas
BACKGROUND: More than 20 years ago our reappraisal of the Hutchinson Sign (HS) gave birth to the concept of the Pseudo-Hutchinson sign. OBJECTIVES: We have found it interesting to emphasize some important histologic points and to expand the list of the numerous HS simulants. METHODS: We have examined the cutaneous samples taken from the pigmented skin of patients in association with nail matrix biopsy. We have also extended the long list of non-melanoma HS...
November 24, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29173995/reflectance-confocal-microscopy-a-promising-tool-to-identify-malignancy-in-melanocytic-lesions-exhibiting-a-dermoscopic-island
#7
M Elosua-González, R Gamo-Villegas, U Floristán-Muruzábal, F Pinedo-Moraleda, J L López-Estebaranz
The dermoscopic island is described as a well-defined area in a melanocytic lesion, with a different dermoscopic pattern from the rest of the lesion. It is predictive of melanoma, particularly when the pattern of the island is atypical. We present the reflectance confocal microscopy (RCM) findings in 3 lesions with dermoscopic islands: nevus-associated melanoma, melanocytic nevus, and in situ melanoma. The nevus-associated melanoma and in situ melanoma presented cellular atypia (atypical cells in isolation or forming nests) and architectural distortion on RCM...
November 22, 2017: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/29166507/pigmented-bowen-s-disease-associated-with-high-risk-hpv-simulating-melanoma-of-the-hand
#8
Rute Facchini Lellis, John Verrinder Veasey, Renata Diniz Jacques Gonçalves
Bowen's disease is an in situ squamous cell carcinoma of the skin with only 2% of pigmented cases reported. It is clinically characterized by papules and plaques of blackened surface that may be caused either by sun damage - usually in photoexposed areas in elderly individuals - or by human papillomavirus infection - usually in the anogenital region of young adults. Dermoscopic aspects of Bowen's disease are discussed for over a decade, but with no definitive criteria that would lead to a definitive diagnosis...
September 2017: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/29165298/nail-apparatus-melanoma-in-a-japanese-population-a-comparative-study-of-surgical-procedures-and-prognoses-in-a-large-series-of-151-cases
#9
Dai Ogata, Hisashi Uhara, Arata Tsutsumida, Naoya Yamazaki, Kosuke Mochida, Masahiro Amano, Shusuke Yoshikawa, Yoshio Kiyohara, Tetsuya Tsuchida
Nail apparatus melanoma (NAM) is a rare subtype of malignant melanoma with a prevalence that varies among populations. Conservative surgical approaches for thin to intermediate NAMs have recently been reported, however, their adoption is controversial, and resulting long-term prognoses are unknown. The purpose of this study was to determine the prognosis of NAM in a sample Asian population, and to investigate whether there is a difference in the local control and overall survival (OS) rates according to the extent of resection of the primary tumour...
November 22, 2017: European Journal of Dermatology: EJD
https://www.readbyqxmd.com/read/29159004/linear-malignant-melanoma-in-situ-reports-and-review-of-cutaneous-malignancies-presenting-as-linear-skin-cancer
#10
Philip R Cohen
Melanomas usually present as oval lesions in which the borders may be irregular. Other morphological features of melanoma include clinical asymmetry, variable color, diameter greater than 6 mm and evolving lesions. Two males whose melanoma in situ presented as linear skin lesions are described and cutaneous malignancies that may appear linear in morphology are summarized in this report. A medical literature search engine, PubMed, was used to search the following terms: cancer, cutaneous, in situ, linear, malignant, malignant melanoma, melanoma in situ, neoplasm, and skin...
September 18, 2017: Curēus
https://www.readbyqxmd.com/read/29156643/melanoma-genetic-abnormalities-tumor-progression-clonal-evolution-and-tumor-initiating-cells
#11
REVIEW
Ugo Testa, Germana Castelli, Elvira Pelosi
Melanoma is an aggressive neoplasia issued from the malignant transformation of melanocytes, the pigment-generating cells of the skin. It is responsible for about 75% of deaths due to skin cancers. Melanoma is a phenotypically and molecularly heterogeneous disease: cutaneous, uveal, acral, and mucosal melanomas have different clinical courses, are associated with different mutational profiles, and possess distinct risk factors. The discovery of the molecular abnormalities underlying melanomas has led to the promising improvement of therapy, and further progress is expected in the near future...
November 20, 2017: Medical Sciences: Open Access Journal
https://www.readbyqxmd.com/read/29136686/-clinicopathologic-and-molecular-characteristics-of-malignant-gastrointestinal-neuroectodermal-tumors
#12
M Zhao, T W Zhao, J Ma, C Y Wu, L Chen, G Q Ru, X L He
Objective: To investigate the clinicopathologic and molecular characteristics, diagnostic, differential diagnostic and prognostic features of malignant gastrointestinal neuroectodermal tumor. Methods: Two cases of malignant gastrointestinal neuroectodermal tumor were retrieved; the clinical and radiologic features, histomorphology, immunophenotype, molecular genetics and prognosis were analyzed and the relevant literature reviewed. Results: Case 1 was a 57-year-old male, presented with recurrent abdominal pain and melena...
November 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/29134183/pigmented-spindle-cell-nevus-of-reed-of-the-eyelid
#13
Melina I Morkin, Mitesh K Kapadia, Nora V Laver
Purpose: To report the clinical, pathological, and immunohistochemical features of the first pigmented spindle cell nevus (PSCN) of Reed documented to have appeared in the eyelid. Methods: The findings of clinical and histopathological examination are presented, along with differential diagnoses and a review of the pertinent literature. Case: A 3-year-old boy presented with a rapidly growing, heavily pigmented left lower lid papule raising the concern of malignancy, warranting excisional biopsy...
September 2017: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/29132722/trajectories-of-premalignancy-during-the-journey-from-melanocyte-to-melanoma
#14
REVIEW
Andrew J Colebatch, Richard A Scolyer
A stepwise progression from melanocytic precursors to cutaneous melanoma is a well-established model, based on decades of careful observation and morphological analysis. The steps identified are benign melanocytic naevus, dysplastic naevus, 'radial growth phase' melanoma (including melanoma in situ) and 'vertical growth phase' melanoma (also termed tumourigenic melanoma). Recent genomic data have refined the understanding of the steps of melanoma development and their relationship to one another. These data support the existence of dysplastic naevi as distinct lesions; suggest the importance of clonal dynamics in the precursor steps of melanoma; and confirm the carcinogenic role of ultraviolet radiation throughout early melanoma development and progression...
November 10, 2017: Pathology
https://www.readbyqxmd.com/read/29124765/lipocalin-type-prostaglandin-d-synthase-derived-pgd2-attenuates-malignant-properties-of-endothelial-cells-in-tumor
#15
Keisuke Omori, Teppei Morikawa, Akiko Kunita, Tatsuro Nakamura, Kosuke Aritake, Yoshihiro Urade, Masashi Fukayama, Takahisa Murata
Endothelial cells (ECs) are a key component of the tumor microenvironment. They have abnormal characteristics compared to the ECs in normal tissues. Here, we found a marked increase in lipocalin-type prostaglandin D synthase (L-PGDS) mRNA (Ptgds) expression in ECs isolated from mouse melanoma. Immunostaining of mouse melanoma revealed expression of L-PGDS protein in the ECs. In situ hybridization also showed L-PGDS (PTGDS) mRNA expression in the ECs of human melanoma and oral squamous cell carcinoma. In vitro experiments showed that stimulation with tumor cell-derived IL-1 and TNF-α increased L-PGDS mRNA expression and its product prostaglandin D2 (PGD2 ) in human normal ECs...
November 10, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/29121636/improving-diagnostic-sensitivity-of-combined-dermoscopy-and-reflectance-confocal-microscopy-imaging-through-double-reader-concordance-evaluation-in-telemedicine-settings-a-retrospective-study-of-1000-equivocal-cases
#16
A M Witkowski, J Łudzik, F Arginelli, S Bassoli, E Benati, A Casari, N De Carvalho, B De Pace, F Farnetani, A Losi, M Manfredini, C Reggiani, J Malvehy, G Pellacani
BACKGROUND: Reflectance confocal microscopy (RCM) is an imaging device that permits non-invasive visualization of cellular morphology and has been shown to improve diagnostic accuracy of dermoscopically equivocal cutaneous lesions. The application of double reader concordance evaluation of dermoscopy-RCM image sets in retrospective settings and its potential application to telemedicine evaluation has not been tested in a large study population. OBJECTIVE: To improve diagnostic sensitivity of RCM image diagnosis using a double reader concordance evaluation approach; to reduce mismanagement of equivocal cutaneous lesions in retrospective consultation and telemedicine settings...
2017: PloS One
https://www.readbyqxmd.com/read/29112525/a-novel-window-technique-using-co2-laser-and-a-review-of-methods-for-nail-matrix-biopsy-of-longitudinal-melanonychia
#17
Jungyoon Ohn, Gwanghyun Jo, Je Byeong Chae, Je-Ho Mun
BACKGROUND: Nail matrix histopathological examination is essential to diagnose longitudinal melanonychia (LM). Several methods for nail matrix biopsy have been introduced but are often difficult to perform because of their invasiveness and technical difficulty. Therefore, a less invasive and novel biopsy technique is needed. OBJECTIVE: To introduce a window technique for nail matrix biopsy. MATERIALS AND METHODS: We retrospectively reviewed the medical records and histopathological specimens of patients with LM who underwent the window technique for nail matrix biopsy at our institution between September 2015 and December 2016...
November 6, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29111820/identification-of-feeder-vessels-in-ocular-surface-neoplasia-using-indocyanine-green-angiography
#18
Matthias Brunner, Bernhard Steger, Vito Romano, Martin Hodson, Yalin Zheng, Heinrich Heimann, Stephen B Kaye
PURPOSE: To evaluate indocyanine green angiography (ICGA) for the identification and characterization of afferent (feeding) and efferent (draining) vessels in patients with ocular surface neoplasia. MATERIALS AND METHODS: Consecutive patients with biopsy-proven benign, pre-invasive, or invasive ocular surface tumors of the bulbar conjunctiva were included. Patients underwent anterior segment optical coherence tomography, ICGA, and color photography for the evaluation of the thickness, location, number, and diameter of afferent and efferent vessels of the lesions...
November 7, 2017: Current Eye Research
https://www.readbyqxmd.com/read/29105744/generational-shift-in-melanoma-incidence-and-mortality-in-queensland-australia-1995-2014
#19
Joanne F Aitken, Danny R Youlden, Peter D Baade, H Peter Soyer, Adèle C Green, B Mark Smithers
Public campaigns encouraging sun protection for skin cancer prevention began in Queensland, Australia, in the early 1980s. We examined recent trends to assess whether earlier evidence of stabilizing melanoma incidence in young people has persisted. Anonymized incidence and mortality data for in situ and invasive melanoma for the 20 years 1995-2014 were obtained from the Queensland Cancer Registry. Time trends were analyzed using JoinPoint regression. Birth cohort patterns were assessed using age-period-cohort models...
November 6, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29100394/effects-of-photodynamic-therapy-on-dermal-fibroblasts-from-xeroderma-pigmentosum-and-gorlin-goltz-syndrome-patients
#20
Alicia Zamarrón, Marta García, Marcela Del Río, Fernando Larcher, Ángeles Juarranz
PDT is widely applied for the treatment of non-melanoma skin cancer pre-malignant and malignant lesions (actinic keratosis, basal cell carcinoma and in situ squamous cell carcinoma). In photodynamic therapy (PDT) the interaction of a photosensitizer (PS), light and oxygen leads to the formation of reactive oxygen species (ROS) and thus the selective tumor cells eradication. Xeroderma pigmentosum (XP) and Gorlin-Goltz Syndrome (GS) patients are at high risk of developing skin cancer in sun-exposed areas. Therefore, the use of PDT as a preventive treatment may constitute a very promising therapeutic modality for these syndromes...
September 29, 2017: Oncotarget
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