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Melanoma in situ

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https://www.readbyqxmd.com/read/29897634/spitzoid-melanoma-with-histopathologic-features-of-alk-gene-rearrangement-exhibiting-alk-copy-number-gain-a-novel-mechanism-of-alk-activation-in-spitzoid-neoplasia
#1
M Farah, P Nagarajan, J L Curry, Z Tang, T-B Kim, P P Aung, C A Torres-Cabala, A K Eterovic, J A Wargo, V G Prieto, M T Tetzlaff
Spitzoid neoplasms pose diagnostic difficulties because their morphology is not consistently predictive of their biologic potential. Recent advances in the molecular characterization of these tumours provide a framework by which they can now begin to be categorized. In particular, spitzoid lesions with ALK rearrangement have been specifically associated with a characteristic plexiform growth pattern of intersecting fascicles of amelanotic spindled melanocytes. We report a case of an 87-year-old man with a 3-cm nodule on his mid-upper back comprised of an intradermal proliferation of fusiform amelanotic melanocytes arranged in intersecting fascicles with occasional peritumoural clefts...
June 13, 2018: British Journal of Dermatology
https://www.readbyqxmd.com/read/29895005/lentigo-maligna-not-always-a-face-and-neck-disease-of-the-elderly
#2
Ana Filipa Duarte, Bernardo Sousa-Pinto, Ana Margarida Barros, Eckart Haneke, Osvaldo Correia
INTRODUCTION: Lentigo maligna (LM) is a rare form of in situ melanoma, frequently seen as a large patch in elderly patients. The aim of this study was to assess clinical and dermoscopic features of LM. MATERIAL AND METHODS: A retrospective study of LM patients presenting to our center between July 2007 and July 2017 was performed. Demographic data, anatomical location, laterality, diameter, Clark level, Breslow stage, "ABCD" signs and dermoscopic features were registered...
June 12, 2018: Dermatology: International Journal for Clinical and Investigative Dermatology
https://www.readbyqxmd.com/read/29894582/in-situ-nail-unit-melanoma-epidemiological-and-clinic-pathologic-features-with-conservative-treatment-and-long-term-follow-up
#3
Sophie Goettmann, Isabelle Moulonguet, Inès Zaraa
BACKGROUND: Nail unit melanoma (NUM) is a rare melanoma variant, usually associated with a poor prognosis because of a delayed diagnosis. Few data are available concerning the management and long-term outcome of in situ NUM. OBJECTIVE: To use a large cohort to provide comprehensive patient data and long-term follow-up information. This will serve to investigate distinctive epidemiological, clinical, and histological features of in situ NUM. to report treatment modalities, assess conservative surgery and evaluate its long-term safety...
June 12, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29894358/-pigmented-extramammary-paget-disease-a-potential-mimicker-of-malignant-melanoma-and-a-pitfall-in-diagnosis-a-case-report-and-review-of-the-literature
#4
Katrin Kiavash, Steve Kim, Andrew D Thompson
Extramammary Paget disease (EMPD) is a rare intraepithelial carcinoma and an uncommon variant of Paget disease affecting areas of the apocrine-rich skin of the perineum, vulva, and less commonly, axilla. Women in their sixth to eighth decades are commonly affected. It is exceedingly rare for EMPD to present on the face, chest, abdomen, or other nonapocrine sites and even more unusual for EMPD to present as a pigmented lesion. The relationship between Paget cells in pigmented extramammary Paget disease (PEMPD) and reactive proliferation and colonization by melanocytes has been poorly explored...
June 7, 2018: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/29890843/monitoring-of-tumor-burden-in-vivo-by-optical-imaging-in-a-xenograft-scid-mouse-model-evaluation-of-two-fluorescent-proteins-of-the-gfp-superfamily
#5
Ingrid Böhm, Stephan Gehrke, Beate Kleb, Martin Hungerbühler, Rolf Müller, Klaus J Klose, Heiko Alfke
Background Mouse models of human-malignant-melanoma (MM) are important tools to study tumor dynamics. The enhanced green fluorescent protein (EGFP) is widely used in molecular imaging approaches, together with optical scanners, and fluorescence imaging. Purpose Currently, there are no data available as to whether other fluorescent proteins are more suitable. The goal of this preclinical study was to analyze two fluorescent proteins of the GFP superfamily under real-time in vivo conditions using fluorescence reflectance imaging (FRI)...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29873027/patterns-of-increased-incidence-and-survival-of-cutaneous-melanoma-in-girona-spain-1994-2013-a-population-based-study
#6
J Rubió-Casadevall, M Puig-Vives, M Puigdemont, L Vilardell, A Carbó-Bagué, R Marcos-Gragera, N Vilar-Coromina
INTRODUCTION: We conducted a population-based study on the Girona Cancer Registry (Spain) for the period 1994-2013 to determine patterns of change in the incidence of melanoma, which is increasing in many countries, and patient survival in our geographical area. MATERIALS AND METHODS: Using the standard registration rules for cancer registries, we calculated crude and standardized incidence rates as well as their trends. We also analysed the observed survival, 1-year conditioned survival and relative survival at 3, 5 and 10 years...
June 5, 2018: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/29844875/cofilin-1-levels-and-intracellular-localization-are-associated-with-melanoma-prognosis-in-a-cohort-of-patients
#7
Candelaria Bracalente, Adriana R Rinflerch, Irene L Ibañez, Francisco M García, Victoria Volonteri, Gastón N Galimberti, Fabio Klamt, Hebe Durán
Melanoma is an aggressive cancer with highly metastatic ability. We propose cofilin-1, a key protein in the regulation of actin dynamics and migration, as a prognostic marker. We determined cofilin-1 levels in a retrospective cohort of patients with melanomas and benign lesions of melanocytes (nevi) by immunohistochemistry. Higher cofilin-1 levels were found in malignant melanoma (MM) with Breslow Index (BI)>2 vs MM with BI<2, melanoma in situ (MIS) and nevi and also in MM with metastasis vs MM without detected metastasis...
May 8, 2018: Oncotarget
https://www.readbyqxmd.com/read/29800556/celecoxib-inhibits-mitochondrial-o-2-consumption-promoting-ros-dependent-death-of-murine-and-human-metastatic-cancer-cells-via-the-apoptotic-signalling-pathway
#8
Rhys Pritchard, Sara Rodríguez-Enríquez, Silvia Cecelia Pacheco-Velázquez, Vuk Bortnik, Rafael Moreno-Sánchez, Stephen Ralph
Capecitabine induced toxicities such as hand-foot syndrome (HFS) and progression of metastatic cancer are both treatable with concurrent celecoxib as shown in the ADAPT (Activating Cancer Stem Cells from Dormancy And Potentiate for Targeting) trial. In the present study, five commonly used NSAIDs, including celecoxib were compared for their pro-oxidative capacities as cytotoxic drugs against human and mouse metastatic melanoma or breast cancer cells in vitro and the source of cellular ROS production induced by celecoxib was examined in greater detail...
May 22, 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29798673/in-situ-vaccination-with-cowpea-vs-tobacco-mosaic-virus-against-melanoma
#9
Abner A Murray, Chao Wang, Steven Fiering, Nicole F Steinmetz
Cancer immunotherapy approaches have emerged as novel treatment regimens against cancer. A particularly interesting avenue is the concept of in situ vaccination, where immunostimulatory agents are introduced into an identified tumor to overcome local immunosuppression and, if successful, mount systemic antitumor immunity. We had previously shown that nanoparticles from cowpea mosaic virus (CPMV) are highly potent in inducing long-lasting antitumor immunity when used as an in situ vaccine in various tumor mouse models...
May 25, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29794873/genomic-fusions-in-pigmented-spindle-cell-nevus-of-reed
#10
Timothy VandenBoom, Victor L Quan, Bin Zhang, Erin M Garfield, Betty Y Kong, Maria C Isales, Elnaz Panah, Catherine Igartua, Timothy Taxter, Nike Beaubier, Kevin White, Pedram Gerami
Recent molecular studies of spitzoid neoplasms have identified mutually exclusive kinase fusions involving ROS1, ALK, RET, BRAF, NTRK1, MET, and NTRK3 as early initiating genomic events. Pigmented spindle cell nevus (PSCN) of Reed is a morphologic variant of Spitz and may be very diagnostically challenging, having histologic features concerning for melanoma. Their occurrence in younger patients, lack of association to sun exposure, and rapid early growth phase similar to Spitz nevi suggest fusions may also play a significant role in these lesions...
May 22, 2018: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29785326/morphologic-characteristics-of-nevi-associated-with-melanoma-a-clinical-dermatoscopic-and-histopathologic-analysis
#11
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/29783238/clinical-efficiency-of-dynamic-observation-of-patients-with-epidermal-dysplasia-of-the-skin
#12
Oleg L Ziukov, Оlena O Oshyvalova
OBJECTIVE: Introduction: Non-melanoma skin cancer is the most common type of cancer among the population of Ukraine. The aim: The study of clinical efficacy of dynamic observation of patients with epidermal dysplasia of the skin. PATIENTS AND METHODS: Materials and methods: To study epidermal dysplasia of the skin there was used identifying information of patients, who were under dynamic observation of dermatologists of the State Scientific Institution "Research and Practical Centre of Preventive and Clinical Medicine" of the State Administration in 2013-2017...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29779219/immunohistochemical-and-molecular-analysis-of-spitzoid-neoplasms-with-pulverocyte-subclones
#13
S M Amin, A M Haugh, J A Bubley, A E Verzì, E A Merkel, C Y Lee, V L Quan, E M Garfield, L M Sholl, B Zhang, P Gerami
BACKGROUND: Clonal naevi are characterized by a focal proliferation of pigmented melanocytes in an otherwise banal naevus. These subclones are often composed of aggregates of larger, epithelioid melanocytes with nuclear atypia and dusty-grey cytoplasmic pigmentation, which are referred to as 'pulverocytes', and this finding may lead to a misdiagnosis of malignant melanoma (MM). AIM: To characterize the significance of subclones of dusty-grey pigmented epithelioid melanocytes within spitzoid neoplasms...
May 20, 2018: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/29776954/role-of-elevated-phip-copy-number-as-a-prognostic-and-progression-marker-for-cutaneous-melanoma
#14
Vladimir Bezrookove, Mehdi Nosrati, James R Miller, David de Semir, Altaf A Dar, Elham Vosoughi, Edith Vaquero, Antje Sucker, Alexander J Lazar, Jeffrey E Gershenwald, Michael A Davies, Dirk Schadendorf, Mohammed Kashani-Sabet
PURPOSE: Previous studies have indicated an important role for pleckstrin homology domain-interacting protein (PHIP) as a marker and mediator of melanoma metastasis. Here we aimed to confirm the role of PHIP copy number in successive stages of melanoma progression. EXPERIMENTAL DESIGN: PHIP copy number was examined using fluorescence in situ hybridization (FISH) in three independent cohorts by recording the percentage of cells harboring &gt; 3 copies of PHIP...
May 18, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29776637/an-update-regarding-the-molecular-genetics-of-melanocytic-neoplasms-and-the-current-applications-of-molecular-genetic-technologies-in-their-diagnosis-and-treatment
#15
REVIEW
Katrin Kiavash, Martin H Bluth, Andrew David Thompson
Molecular genetic technologies are used to aid in diagnosis and treatment of borderline melanocytic tumors as an adjuvant to the gold standard histopathologic evaluation. A specific set of fluorescence in situ hybridization probes is widely used to aid in diagnosing challenging melanocytic lesions. New melanoma probe cocktails have revealed increased sensitivity and specificity in ambiguous melanocytic cases. Array comparative genomic hybridization is a more complex technology used for the work-up of diagnostically problematic Spitzoid melanocytic proliferations...
June 2018: Clinics in Laboratory Medicine
https://www.readbyqxmd.com/read/29773427/microphthalmia-associated-transcription-factor-mitf-promiscuous-staining-patterns-in-fibrohistiocytic-lesions-is-a-potential-pitfall
#16
Sambit K Mohanty, Shivani Sharma, Dinesh Pradhan, Shivani R Kandukuri, Navid Farahani, Catherine Barry, Julie M Wu, David Frishberg, Bonnie Balzer
Microphthalmia-associated transcription factor (MiTF) is used as a marker of melanocytic differentiation. However, MiTF immunoexpression has also been observed in histiocytes, macrophages, smooth muscle cells and fibroblasts, which raise the concern of fibrohistiocytic (FH) lesions being misdiagnosed as melanoma based on MiTF immunoreactivity. MiTF has been known to be positive in FH tumors, but this is the first study evaluating ninety-three fibrohistiocytic neoplasms to understand and delineate the staining pattern of MiTF in these tumors...
May 11, 2018: Pathology, Research and Practice
https://www.readbyqxmd.com/read/29766713/probing-dna-hybridization-equilibrium-by-cationic-conjugated-polymer-for-highly-selective-detection-and-imaging-of-single-nucleotide-mutation
#17
Zehao Li, Xu Zhou, Lidan Li, Shue Liu, Congshan Wang, Lina Li, Changyuan Yu, Xin Su
Hybridization-based probes emerge as a promising tool for nucleic acid target detection and imaging. However, the single-nucleotide selectivity is still challenging because the specificity of hybridization reaction is typically low at room temperature. We disclose an effective and simple method for highly selective detection and in situ imaging of single-nucleotide mutation (SNM) by taking the advantages of the specific hybridization of short duplex and the signal amplifying effect of cationic conjugated polymer (CCP)...
May 16, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29765953/response-to-comparison-of-gene-expression-profiling-and-chromosome-3-analysis-by-fluorescent-in-situ-hybridization-and-multiplex-ligation-probe-amplification-in-fine-needle-aspiration-biopsy-specimens-of-uveal-melanoma
#18
https://www.readbyqxmd.com/read/29765269/mohs-micrographic-surgery-development-technique-and-applications-in-cutaneous-malignancies
#19
REVIEW
Eillen Luisa A Chen, Divya Srivastava, Rajiv I Nijhawan
Mohs micrographic surgery (MMS) is a specialized technique for treating skin malignancies that offers the highest cure rate by allowing histological evaluation of the entire peripheral and deep margins. MMS also maximally preserves as much uninvolved, normal adjacent tissue as possible, allowing for the best cosmetic and functional outcomes. When used for appropriate indications, this technique is also more cost-effective than other treatment modalities. In this article, the authors will discuss the development of MMS, the steps involved in this procedure, and the indications for this technique...
May 2018: Seminars in Plastic Surgery
https://www.readbyqxmd.com/read/29748391/tumor-specific-inhibition-of-in-situ-vaccination-by-distant-untreated-tumor-sites
#20
Zachary S Morris, Emily I Guy, Lauryn R Werner, Peter M Carlson, Clinton M Heinze, Jasdeep S Kler, Sara M Busche, Abigail A Jaquish, Raghava N Sriramaneni, Lakeesha Carmichael, Hans Loibner, Stephen D Gillies, Alan J Korman, Amy K Erbe, Jacquelyn A Hank, Alexander L Rakhmilevich, Paul M Harari, Paul M Sondel
In situ vaccination is an emerging cancer treatment strategy that uses local therapies to stimulate a systemic antitumor immune response. We previously reported an in situ vaccination effect when combining radiation (RT) with intra-tumor (IT) injection of tumor-specific immunocytokine (IC), a fusion of tumor-specific antibody and IL2 cytokine. In mice bearing two tumors, we initially hypothesized that delivering RT plus IT-IC to the "primary" tumor would induce a systemic antitumor response causing regression of the "secondary" tumor...
May 10, 2018: Cancer Immunology Research
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