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https://www.readbyqxmd.com/read/28916903/merkel-cell-carcinoma-epidemiology-pathogenesis-diagnosis-and-therapy
#1
REVIEW
Teresa Amaral, Ulrike Leiter, Claus Garbe
Merkel cell carcinoma (MCC) is a rare and aggressive skin cancer with a neuroendocrine phenotype. Incidence varies according to the geographic regions but is overall increasing. Different risk factors have been identified namely advanced age, immunosuppression, and ultraviolet light exposure. An association between MCC and polyomavirus infection is known. However, the exact mechanism that leads to carcinogenesis is yet to be fully understood. Surgery when feasible is the recommended treatment for localized disease, followed by adjuvant radiation or chemoradiation...
September 16, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28905996/merkel-cells-and-meissner-s-corpuscles-in-human-digital-skin-display-piezo2-immunoreactivity
#2
Y García-Mesa, J García-Piqueras, B García, J Feito, R Cabo, J Cobo, J A Vega, O García-Suárez
The transformation of mechanical energy into electrical signals is the first step in mechanotransduction in the peripheral sensory nervous system and relies on the presence of mechanically gated ion channels within specialized sensory organs called mechanoreceptors. Piezo2 is a vertebrate stretch-gated ion channel necessary for mechanosensitive channels in mammalian cells. Functionally, it is related to light touch, which has been detected in murine cutaneous Merkel cell-neurite complexes, Meissner-like corpuscles and lanceolate nerve endings...
September 14, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28905116/-teledermoscopy-by-mobile-phones-reliable-help-in-the-diagnosis-of-skin-lesions
#3
A Zink, A Kolbinger, M Leibl, I Léon Suarez, J Gloning, C Merkel, J Winkler, T Biedermann, J Ring, B Eberlein
BACKGROUND: Teledermoscopy is a promising modern technique to complement or to substitute dermatologic examination. OBJECTIVE: In this pilot study, we compared the outcomes of teledermoscopic consultations with clinical examinations and histologic results. METHODS: Conventional and dermatoscopic photos of single lesions were taken in 26 patients using a mobile phone and an attached handyscope optical system. Five resident physicians performed a clinical examination including dermoscopy while the teledermatologic and teledermoscopic photos were assessed by an experienced dermatologist...
September 13, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28895885/anaplastic-lymphoma-kinase-in-cutaneous-malignancies
#4
REVIEW
Severine Cao, Vinod E Nambudiri
Anaplastic lymphoma kinase (ALK) is a receptor tyrosine kinase that has been implicated in the pathogenesis of a variety of neoplasms. As suggested by its name, ALK was first described as part of a translocation product in cases of anaplastic large-cell lymphoma, with other genetic and cytogenetic ALK mutations subsequently coming to attention in the development of many other hematologic and solid organ malignancies. ALK has now been shown to play a role in the pathogenesis of several cutaneous malignancies, including secondary cutaneous systemic anaplastic large-cell lymphoma (ALCL) and primary cutaneous ALCL, melanoma, spitzoid tumors, epithelioid fibrous histiocytoma, Merkel cell carcinoma, and basal cell carcinoma...
September 12, 2017: Cancers
https://www.readbyqxmd.com/read/28893943/merkel-cell-polyomavirus-and-merkel-cell-carcinoma
#5
REVIEW
James A DeCaprio
Merkel cell polyomavirus (MCPyV) causes the highly aggressive and relatively rare skin cancer known as Merkel cell carcinoma (MCC). MCPyV also causes a lifelong yet relatively innocuous infection and is one of 14 distinct human polyomaviruses species. Although polyomaviruses typically do not cause illness in healthy individuals, several can cause catastrophic diseases in immunocompromised hosts. MCPyV is the only polyomavirus clearly associated with human cancer. How MCPyV causes MCC and what oncogenic events must transpire to enable this virus to cause MCC is the focus of this essay...
October 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28893934/tumour-viruses-and-innate-immunity
#6
REVIEW
Sharon E Hopcraft, Blossom Damania
Host cells sense viral infection through pattern recognition receptors (PRRs), which detect pathogen-associated molecular patterns (PAMPs) and stimulate an innate immune response. PRRs are localized to several different cellular compartments and are stimulated by viral proteins and nucleic acids. PRR activation initiates signal transduction events that ultimately result in an inflammatory response. Human tumour viruses, which include Kaposi's sarcoma-associated herpesvirus, Epstein-Barr virus, human papillomavirus, hepatitis C virus, hepatitis B virus, human T-cell lymphotropic virus type 1 and Merkel cell polyomavirus, are detected by several different PRRs...
October 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28893933/tumour-virus-epidemiology
#7
REVIEW
Ruth M Lunn, Gloria D Jahnke, Charles S Rabkin
A viral etiology of cancer was first demonstrated in 1911 by Peyton Rous who injected cell-free filtrate from a chicken sarcoma into healthy chickens and found it induced a tumour. Since the discovery over 50 years ago of the Epstein-Barr virus as the cause of Burkitt lymphoma, seven other human viruses or groups of viruses-hepatitis B virus, hepatitis C virus, human immunodeficiency virus type 1, some human papillomaviruses, human T-cell lymphotropic virus type 1, Kaposi sarcoma-associated herpesvirus and Merkel cell polyomavirus-have been linked to human cancer...
October 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28893932/tumour-virology-in-the-era-of-high-throughput-genomics
#8
REVIEW
Ka-Wei Tang, Erik Larsson
With the advent of massively parallel sequencing, oncogenic viruses in tumours can now be detected in an unbiased and comprehensive manner. Additionally, new viruses or strains can be discovered based on sequence similarity with known viruses. Using this approach, the causative agent for Merkel cell carcinoma was identified. Subsequent studies using data from large collections of tumours have confirmed models built during decades of hypothesis-driven and low-throughput research, and a more detailed and comprehensive description of virus-tumour associations have emerged...
October 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28892422/clinicopathologic-and-microbiologic-findings-associated-with-emphysematous-cystitis-in-27-dogs
#9
Lindsay Kate Merkel, Jody Lulich, David Polzin, Christopher Ober, Jodi Westropp, Jane Sykes
This is a retrospective case series of 27 dogs with emphysematous cystitis. Medical records from two veterinary teaching hospitals from 1992 to 2014 were reviewed. The aims of the study were to determine imaging findings, common underlying disease processes, and prevalent bacterial species and their antimicrobial susceptibility patterns in dogs with emphysematous cystitis. The most common lower urinary tract sign was hematuria. Gas was detected in the wall and lumen of the urinary bladder in 14 of 27 dogs (51...
September 11, 2017: Journal of the American Animal Hospital Association
https://www.readbyqxmd.com/read/28892261/fabrication-of-trabecular-bone-templated-tissue-engineered-constructs-by-3d-inkjet-printing
#10
Joseph P Vanderburgh, Shanik J Fernando, Alyssa R Merkel, Julie A Sterling, Scott A Guelcher
3D printing enables the creation of scaffolds with precisely controlled morphometric properties for multiple tissue types, including musculoskeletal tissues such as cartilage and bone. Computed tomography (CT) imaging has been combined with 3D printing to fabricate anatomically scaled patient-specific scaffolds for bone regeneration. However, anatomically scaled scaffolds typically lack sufficient resolution to recapitulate the <100 micrometer-scale trabecular architecture essential for investigating the cellular response to the morphometric properties of bone...
September 11, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28886626/observation-of-the-de-vries-behavior-in-sma-phase-of-a-liquid-crystal-using-polarised-raman-scattering-and-infrared-spectroscopy
#11
A Kocot, J K Vij, T S Perova, K Merkel, V Swaminathan, S P Sreenilayam, N Yadav, V P Panov, P J Stevenson, A Panov, D Rodriguez-Lojo
Two approaches exist in the literature for describing the orientational distribution function (ODF) of the molecular directors in SmA* phase of liquid crystals, though several models are recently proposed in the literature for explaining the de Vries behaviour. These ODFs correspond to either the conventional unimodal arrangements of molecular directors arising from the mean field theory that leads to the broad or sugar-loaf like distribution or to the "diffuse-cone-shaped" type distribution proposed by de Vries...
September 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28885435/treatment-of-metastatic-eyelid-carcinoma
#12
Paola Bonavolontà, Giovanni Dell'Aversana Orabona, Vincenzo Abbate, Giorgio Iaconetta, Giulio Bonavolontà, Luigi Califano
PURPOSE: The aim of this study was to report management and outcomes in patients affected by eyelids carcinomas involving regional lymph nodes. METHODS: We have retrospectively analyzed the data of patients affected by eyelids carcinoma with nodal involvement. The clinical records of 10 patients with malignant eyelid carcinoma and regional nodal metastasis treated between September 2011 and March 2015 have been analyzed. RESULTS: The study included 5 women and 5 men (median age 54,5 years; range 37-80 years)...
September 6, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28881339/interstitial-immunostaining-and-renal-outcomes-in-antineutrophil-cytoplasmic-antibody-associated-glomerulonephritis
#13
Duvuru Geetha, Sanjeev Sethi, An S De Vriese, Ulrich Specks, Cees G M Kallenberg, Noha Lim, Robert Spiera, E William St Clair, Peter A Merkel, Philip Seo, Paul A Monach, Nicola Lepori, Barri J Fessler, Carol A Langford, Gary S Hoffman, Rishi Sharma, John H Stone, Fernando C Fervenza
BACKGROUND: Immunopathologic features predict renal function at baseline and follow-up in antineutrophil cytoplasmic antibody (ANCA)-associated glomerulonephritis (GN). The interstitial infiltrate consists predominantly of T lymphocytes, but their pathophysiologic significance is unclear, especially in light of the success of B-cell-directed therapy. METHODS: Renal biopsies from 33 patients treated with cyclophosphamide (CYC; n = 17) or rituximab (RTX; n = 16) in the RTX in ANCA-associated vasculitis (RAVE) trial were classified according to the new ANCA GN classification...
September 8, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28880307/merkel-deserves-another-term-as-german-chancellor
#14
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
September 6, 2017: Nature
https://www.readbyqxmd.com/read/28878663/subacute-cerebellar-degeneration-due-to-a-paraneoplastic-phenomenon-associated-with-metastatic-merkel-cell-carcinoma-a-case-report
#15
Angelos Sharobeam, Jason Ray, Juliana Dong, Victor Chong
PURPOSE: The aim of this article is to illustrate the diagnostic challenges and management of paraneoplastic neurological syndromes in Merkel cell carcinoma. MATERIALS AND METHODS: We describe a previously functionally independent 85-year-old woman who presented with subacute onset of dizziness and gait ataxia in the setting of metastatic Merkel cell carcinoma. RESULTS: Diagnosis was made on biopsy after positron emission tomography imaging revealed increased metabolic activity in 2 left inguinofemoral lymph nodes...
May 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28870692/distinct-patterns-of-acral-melanoma-based-on-site-and-relative-sun-exposure
#16
Alexandra M Haugh, Bin Zhang, Victor L Quan, Erin M Garfield, Jeffrey A Bubley, Emily Kudalkar, Anna Elisa Verzi, Kara Walton, Timothy VandenBoom, Emily A Merkel, Christina Y Lee, Timothy Tan, Maria Cristina Isales, Betty Y Kong, Alexander T Wenzel, Christopher G Bunick, Jaehyuk Choi, Jeffrey Sosman, Pedram Gerami
Acral melanoma is distinct from melanoma of other cutaneous sites, yet there is considerable variation within this category. To better define this variation, we assessed melanomas occurring on dorsal (n=21), volar (n=9), and subungual/interdigital (n=13) acral skin as well as acral nevi (n=24) for clinical, histologic, and molecular features. Melanomas on dorsal acral surfaces demonstrated clear differences compared to volar and subungual/interdigital melanomas. The latter two groups exhibited significantly less frequent BRAF mutations (p=...
September 1, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28868202/a-thoracic-vertebral-localization-of-a-metastasized-cutaneous-merkel-cell-carcinoma-case-report-and-review-of-literature
#17
Rosario Maugeri, Antonella Giugno, Roberto G Giammalva, Carlo Gulì, Luigi Basile, Francesca Graziano, Domenico G Iacopino
BACKGROUND: Merkel cell carcinoma (MCC) is a rare neuroendocrine skin tumor, which may be related to sun exposure. It can metastasize to lungs, liver and bone, leading to severe morbidity and mortality. Vertebral metastases from MCC are rare. The authors report the tenth case in the literature, a 59-year-old patient with MCC, which was primarily localized in the scalp, and later provoked distant metastasis to the thoracic spinal column. CASE DESCRIPTION: A 59-year-old woman was admitted at our Unit of Neurosurgery with a 4-month history of progressive and severe dorsal back pain, without neurological signs...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28868044/merkel-cell-carcinoma-with-distant-metastasis-to-the-clivus-causing-symptoms-mimicking-tolosa-hunt-syndrome-a-case-report-and-literature-review
#18
Kwo Wei David Ho, Peter A Drew, Miguel Chuquilin
Merkel cell carcinoma (MCC) is an uncommon but highly malignant neuroendocrine tumor of the skin. MCC can metastasize, but involvement of the central nervous system is rare. Here, we report a case of rapidly progressing metastatic MCC to the clivus and bilateral cavernous sinus in an immunocompromised patient. This case is unique in that it is the first case report showing MCC metastasis to the clivus from a distant site. It also demonstrates that a MCC metastasis can masquerade with symptoms of Tolosa-Hunt syndrome...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28864650/omeract-endorsement-of-patient-reported-outcome-instruments-in-antineutrophil-cytoplasmic-antibody-associated-vasculitis
#19
Joanna C Robson, Gunnar Tomasson, Nataliya Milman, Sue Ashdown, Annelies Boonen, George C Casey, Peter F Cronholm, David Cuthbertson, Jill Dawson, Haner Direskeneli, Ebony Easley, Tanaz A Kermani, John T Farrar, Don Gebhart, Georgia Lanier, Raashid A Luqmani, Alfred Mahr, Carol A McAlear, Jacqueline Peck, Beverley Shea, Judy A Shea, Antoine G Sreih, Peter S Tugwell, Peter A Merkel
OBJECTIVE: The antineutrophil cytoplasmic antibody-associated vasculitides (AAV) are multiorgan diseases. Patients with AAV report impairment in their health-related quality of life (HRQOL) and have different priorities regarding disease assessment compared with physicians. The Outcome Measures in Rheumatology (OMERACT) Vasculitis Working Group previously received endorsement for a core set of domains in AAV. Two approaches to measure patient-reported outcomes (PRO) were presented at OMERACT 2016...
September 1, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28864648/assessment-of-disease-activity-in-large-vessel-vasculitis-results-of-an-international-delphi-exercise
#20
Sibel Z Aydin, Haner Direskeneli, Peter A Merkel
OBJECTIVE: To arrive at consensus for candidate outcomes for disease activity assessment in large-vessel vasculitis (LVV) in clinical trials. METHODS: A Delphi survey including 99 items was circulated among international experts for 3 rounds. RESULTS: Fifty-seven items were accepted for both giant cell arteritis and Takayasu arteritis. Sixty-seven percent of experts voted to have a common approach for both diseases with additional disease-specific items such as weight loss, scalp tenderness/necrosis, morning stiffness, dizziness, visual symptoms, and imaging...
September 1, 2017: Journal of Rheumatology
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