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mitosis melanoma

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https://www.readbyqxmd.com/read/28209051/melanoma-in-the-elderly
#1
Ausilia M Manganoni, Laura Pizzatti, Laura Pavoni, Francesca Consoli, Enrico Damiani, Giorgio Manca, Giulio Gualdi, Piergiacomo Calzavara-Pinton
BACKGROUND: Among older patients, melanoma in general presents biological features related to a more aggressive biology, such as more locally advanced tumor. Management of melanoma in elderly may be difficult, mainly due to comorbidities. We report the experience of the Melanoma Unit of University Hospital ASST Spedali Civili di Brescia, Italy. METHODS: Study subjects were drawn from 3444 patients with histological confirmed melanoma. Data were extracted from electronic database of the Melanoma Unit of University Hospital ASST Spedali Civili of Brescia, Italy...
February 16, 2017: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/28196618/dermoscopic-features-predicting-the-presence-of-mitoses-in-thin-melanoma
#2
S Ribero, G Argenziano, A Lallas, E Moscarella, E Benati, M Raucci, S Piana, C Longo
BACKGROUND: The latest AJCC classification has included the number of mitoses as a factor for upstaging thin melanomas. Meanwhile, while dermoscopy has often been used to predict melanoma thickness, its value in predicting number of mitoses remains unknown. OBJECTIVE: Our aim is to evaluate the correlation between dermoscopic features and the presence of mitoses in a consecutive cohort of thin melanomas. METHODS: A case control study has been performed to identify specific dermoscopic parameters that could differentiate thin melanomas with 1 or more mitoses per mm2 from those without mitoses...
February 3, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28154916/-diagnostics-of-malignant-melanoma-of-the-skin-recommendations-of-the-current-s3-guidelines-on-histology-and-molecular-pathology
#3
C Rose
The updated S3 guidelines on malignant melanoma were established in August 2016. The principles of diagnostics and classification are based on the histopathological results from the primary tumor and if necessary the sentinel lymph nodes. The most important factor for prognosis is the tumor thickness according to Breslow and the detection of sentinel node micrometastases. The surgical safety margin after excision is dependent on the tumor thickness. Furthermore, ulceration of the primary tumor and presence of mitosis in melanomas less than 1 mm in thickness are also considered in the T‑classification...
February 2, 2017: Der Pathologe
https://www.readbyqxmd.com/read/28126183/-melanocytoma-and-meningeal-melanocytosis-similar-but-different-lesions
#4
Felipe Padilla-Vázquez, Víctor Hugo Escobar-de la Garma, Arturo Ayala-Arcipreste, Rafael Mendizábal-Guerra, Teresa Cuesta-Mejía
BACKGROUND: Meningeal melanomatosis is an extra-axial well-encapsulated malignant tumour with diffuse meningeal growth and dark coloration (due to high melanin contents), while meningeal melanocytoma is the focalized benign variant. Melanocytic lesions may be secondary to melanoma or be histologically benign, however, their diffuse nature makes them impossible to cure. Melanocytosis is a diffuse tumour that can form solitary extra-axial tumours, which invades the parenchyma and presents signs of malignancy with increased mitosis and Ki67, observed in 1 to 6% of immunopathological exams...
January 23, 2017: Cirugia y Cirujanos
https://www.readbyqxmd.com/read/28116802/mitotic-figures-and-the-evolving-staging-of-melanoma
#5
Thomas N Helm
The seventh edition of the American Joint Committee on Cancer (AJCC)'s staging manual identified tumor thickness, ulceration, and mitotic figures as important adverse prognostic factors for survival. Identification of a single mitosis prompted staging of a tumor as T1b and prompted consideration of sentinel lymph node biopsy (SLNB). Careful review of survival data has shown that the identification of mitotic figures in melanoma is not an independent variable but linked to thickness and ulceration. The updated eighth edition of the AJCC's cancer staging manual reflects this understanding by stratifying thin melanomas by depth of invasion and ulceration rather than including mitotic rate...
January 24, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28107565/idermatopath-a-novel-software-tool-for-mitosis-detection-in-h-e-stained-tissue-sections-of-malignant-melanoma
#6
C Andres, B Andres-Belloni, R Hein, T Biedermann, A Schäpe, N Brieu, R Schönmeyer, M Yigitsoy, J Ring, G Schmidt, N Harder
BACKGROUND: Malignant Melanoma (MM) is characterized by a growing incidence and a high malignant potential. Beside well defined prognostic factors such as tumor thickness and ulceration, the Mitotic Rate (MR) was included in the AJCC recommendations for diagnosis and treatment of MM. In daily routine, the identification of a single mitosis can be difficult on Hematoxylin&Eosin slides alone. Several studies showed a big inter- and intra-individual variability in detecting the MR in MM even by very experienced investigators, thus raising the question for a computer assisted method...
January 20, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28079338/a-single-institute-experience-on-melanoma-prognosis-a-long-term-follow-up
#7
Emi Dika, Marco A Chessa, Giulia Veronesi, Giulia M Ravaioli, Pier A Fanti, Simone Ribero, Giovanni Tripepi, Carlotta Gurioli, Alessandro Traniello Gradassi, Martina Lambertini, Annalisa Patrizi
BACKGROUND: The prognosis of cutaneous melanoma is correlated to histopathologic parameters such as Breslow thickness, the presence of mitosis, ulceration and lymphatic involvement at the moment of the diagnosis. On the other hand, the prognostic value of parameters such as age, sex, and tumor localization are still a matter of debate. We evaluated herein the prognostic factors in melanoma patients during a long term follow- up (60 months). METHODS: Melanoma patients presenting stage IB-III at diagnosis were included...
January 12, 2017: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/27873142/university-hospital-waterford-5-year-experience-of-cutaneous-melanoma
#8
R Sehgal, C X Cheung, R Alradadi, D A Healy, R Landers, G T O'Donoghue
INTRODUCTION: The incidence of cutaneous melanoma (CM) continues to rise in Ireland. Despite significant advances in melanoma molecular therapy, surgery remains the mainstay of treatment for CM. The University Hospital Waterford (UHW) prospectively maintained CM registry was established in 2010. AIM: To summarize 5-year experience (2010-2015) of primary CM presenting to UHW. METHODS: Data were retrospectively obtained from a central electronic pathology and radiology repository augmented by HIPE data and theatre logs...
November 21, 2016: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/27835901/mutational-activation-of-braf-confers-sensitivity-to-transforming-growth-factor-beta-inhibitors-in-human-cancer-cells
#9
Lindsay C Spender, G John Ferguson, Sijia Liu, Chao Cui, Maria Romina Girotti, Gary Sibbet, Ellen B Higgs, Morven K Shuttleworth, Tom Hamilton, Paul Lorigan, Michael Weller, David F Vincent, Owen J Sansom, Margaret Frame, Peter Ten Dijke, Richard Marais, Gareth J Inman
Recent data implicate elevated transforming growth factor-β (TGFβ) signalling in BRAF inhibitor drug-resistance mechanisms, but the potential for targeting TGFβ signalling in cases of advanced melanoma has not been investigated. We show that mutant BRAFV600E confers an intrinsic dependence on TGFβ/TGFβ receptor 1 (TGFBR1) signalling for clonogenicity of murine melanocytes. Pharmacological inhibition of the TGFBR1 blocked the clonogenicity of human mutant BRAF melanoma cells through SMAD4-independent inhibition of mitosis, and also inhibited metastasis in xenografted zebrafish...
December 13, 2016: Oncotarget
https://www.readbyqxmd.com/read/27613330/in-vitro-and-in-vivo-antitumor-activity-of-a-novel-carbonyl-ruthenium-compound-the-ct-rucl-co-dppb-bipy-pf-6-dppb-1-4-bis-diphenylphosphine-butane-and-bipy-2-2-bipyridine
#10
Andréa P Carnizello, Marília I F Barbosa, Monize Martins, Natália H Ferreira, Pollyanna F Oliveira, Geórgia M Magalhães, Alzir A Batista, Denise C Tavares
This study performed in vitro and in vivo biological assays of the ruthenium (II) compound ct-[RuCl(CO)(dppb)(bipy)]PF6 (where, dppb=1,4-bis(diphenylphosphine)butane and bipy=2,2'-bipyridine). The cytotoxic activity of this compound was evaluated against different tumor cell lines (HeLa, human cervical adenocarcinoma; MCF7, human breast adenocarcinoma; MO59J, human glioblastoma; HepG2, hepatocellular carcinoma and B16F10, murine melanoma) and healthy cell line (V79, Chinese hamster lung fibroblasts), by XTT (sodium 2,3'-bis(2-methoxy-4-nitro-5-sulfophenyl)-5-[(phenylamino)-carbonyl]-3,4-tetrazolium-bis(4-methoxy-6-nitro)benzene-sulfonic acid hydrate) method...
November 2016: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/27602146/an-observational-study-regarding-the-rate-of-growth-in-vertical-and-radial-growth-phase-superficial-spreading-melanomas
#11
Roberto Betti, Elena Agape, Raffaella Vergani, Laura Moneghini, Amilcare Cerri
The natural history of superficial spreading melanomas (SSMs) involves the progression from a radial growth phase (RGP) to a vertical growth phase (VGP). Currently, a patient's history represents the only method to estimate the rate of tumor growth. The present study aimed to verify whether the estimated rate of growth (ROG) of SSMs with a RGP or VGP exhibited any differences, and to evaluate the possible implications for the most important prognostic determinants. ROG was quantified as the ratio between Breslow's thickness in millimeters (mm) and the time of tumor growth in months, defined as the time between the date that the patient had first noticed the lesion in which melanoma subsequently developed and the date on which the patient first felt this lesion changed...
September 2016: Oncology Letters
https://www.readbyqxmd.com/read/27554118/p21-is-responsible-for-ionizing-radiation-induced-bypass-of-mitosis
#12
Xu Rui Zhang, Yong Ai Liu, Fang Sun, He Li, Su Wen Lei, Ju Fang Wang
OBJECTIVE: To explore the role of p21 in ionizing radiation-induced changes in protein levels during the G2/M transition and long-term G2 arrest. METHODS: Protein expression levels were assessed by western blot in the human uveal melanoma 92-1 cells after treatment with ionizing radiation. Depletion of p21 was carried out by employing the siRNA technique. Cell cycle distribution was determined by flow cytometry combined with histone H3 phosphorylation at Ser28, an M-phase marker...
July 2016: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/27543214/ki-67-p53-and-p16-expression-and-g691s-ret-polymorphism-in-desmoplastic-melanoma-dm-a-clinicopathologic-analysis-of-predictors-of-outcome
#13
Nicholas F Lawrence, Marc R Hammond, Dennie T Frederick, Yuhua Su, Dora Dias-Santagata, April Deng, M Angelica Selim, Meera Mahalingam, Keith T Flaherty, Mai P Hoang
BACKGROUND: The prognostic role Ki-67, p53, and p16 immunostains and RET (rearranged during transfection) polymorphism in desmoplastic melanoma has not been evaluated. OBJECTIVE: We sought to identify potential prognostic markers. METHODS: We performed Ki-67, p53, and p16 immunostains on 66 desmoplastic melanomas, and sequenced RET G691 polymorphism and recurrent mutations of 17 cancer genes in 55 and 20 cases, respectively. RESULTS: Recurrence and metastasis were documented in 11 of 66 (17%) and 26 of 66 (39%) patients, respectively...
September 2016: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/27272799/diagnostic-and-prognostic-value-of-proex-c-and-glut1-in-melanocytic-lesions
#14
Shaofeng Yan, Bryan N Coffing, Zhongze Li, Haiyi Xie, Jeoffry B Brennick, Haaris A Beg, Heather M Froehlich, Wendy A Wells
BACKGROUND: Melanoma is one of the most aggressive types of skin cancer. The purpose of this study was to evaluate the use of two biomarkers, ProEx C and glucose transporter isoform 1 (GLUT1), in the diagnosis and prognostication of melanoma. MATERIALS AND METHODS: We analyzed 129 melanomas and 59 benign nevi in a tissue microarray using immunohistochemical method with antibodies to topoisomerase IIα (TOP2A) and minichromosome maintenance complex component 2 (MCM2) using ProEx C and to GLUT1...
June 2016: Anticancer Research
https://www.readbyqxmd.com/read/26982777/melanoma-patterns-of-distant-relapse-a-study-of-108-cases-from-a-south-brazilian-center
#15
Rodrigo Kraft Rovere, Maria Eduarda Pires de Souza, Danielle Louise da Maia Cidral, Sara Fernanda Hilgert, Yasmine Rodrigues Chamse Ddine, Carlos Efrain Stein, Giuliano Santos Borges, Adma Silva de Lima
BACKGROUND: The incidence of cutaneous melanoma has increased over the last decades. Recurrences occur most frequently within the first 2-3 years after diagnosis but patients carry a lifelong risk of relapse. Nevertheless, there is no consensus in the literature on what screening tests patients should undergo. OBJECTIVES: To evaluate the most common melanoma metastasis sites among a South Brazilian population from a city with one of the highest melanoma rates, and establish the best screening method for these patients...
January 2016: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/26980024/braf-and-epithelial-mesenchymal-transition-in-primary-cutaneous-melanoma-a-role-for-snail-and-e-cadherin
#16
Brendon Mitchell, Dominick A Leone, John K Feller, Shi Yang, Meera Mahalingam
In vitro studies in melanoma indicate that up-regulation of the transcriptional repressor Snail occurs with a concomitant decrease of its target E-cadherin, both hallmarks of epithelial-mesenchymal transition-an association not established in vivo. We sought to elucidate the relationship between BRAF, Snail, E-cadherin, and established histopathologic prognosticators in primary cutaneous melanoma. Archived annotated samples with a diagnosis of primary cutaneous melanoma were retrieved (n = 68 cases; 34 BRAF mutant and 34 BRAF wild type) and immunohistochemically stained for Snail and E-cadherin protein expression...
June 2016: Human Pathology
https://www.readbyqxmd.com/read/26868000/the-protein-phosphatase-6-catalytic-subunit-ppp6c-is-indispensable-for-proper-post-implantation-embryogenesis
#17
Honami Ogoh, Nobuhiro Tanuma, Yasuhisa Matsui, Natsuki Hayakawa, Ayaka Inagaki, Mami Sumiyoshi, Yuki Momoi, Ayako Kishimoto, Mai Suzuki, Nozomi Sasaki, Tsukasa Ohuchi, Miyuki Nomura, Yuriko Teruya, Keiko Yasuda, Toshio Watanabe, Hiroshi Shima
Ppp6c, which encodes the catalytic subunit of phosphoprotein phosphatase 6 (PP6), is conserved among eukaryotes from yeast to humans. In mammalian cells, PP6 targets IκBε for degradation, activates DNA-dependent protein kinase to trigger DNA repair, and is reportedly required for normal mitosis. Recently, Ppp6c mutations were identified as candidate drivers of melanoma and skin cancer. Nonetheless, little is known about the physiological role of Ppp6c. To investigate this function in vivo, we established mice lacking the Ppp6c phosphatase domain by crossing heterozygous mutants...
February 2016: Mechanisms of Development
https://www.readbyqxmd.com/read/26859408/absence-of-tumor-infiltrating-lymphocyte-is-a-reproducible-predictive-factor-for-sentinel-lymph-node-metastasis-a-multicenter-database-study-by-the-brazilian-melanoma-group
#18
João Pedreira Duprat, Eduard René Brechtbülh, Bianca Costa de Sá, Mauro Enokihara, Jose Humberto Fregnani, Gilles Landman, Marcus Maia, Felice Riccardi, Francisco Alberto Belfort, Alberto Wainstein, Luciana F Moredo, Higino Steck, Miguel Brandão, Marcelo Moreno, Eduardo Miranda, Ivan Dunshee de Oliveira Santos
AIMS: The aim of this study is to confirm the function of tumor-infiltrating lymphocytes (TILs) in sentinel lymph node (SLN) metastasis. MATERIALS AND METHODS: This retrospective study included 633 patients with invasive melanoma who underwent sentinel lymph node biopsy in 7 referral centers certified by the Brazilian Melanoma Group. Independent risk factors of sentinel node metastasis (SNL) were identified by multiple logistic regression. RESULTS: SLN metastasis was detected in 101 of 633 cases (16...
2016: PloS One
https://www.readbyqxmd.com/read/26827186/association-of-sentinel-lymph-node-diameter-with-melanoma-metastasis
#19
Justin Merkow, Alessandro Paniccia, Edward Jones, Teresa Jones, Maggie Hodges, Robert Stovall, Nicole Kounalakis, Csaba Gajdos, Karl Lewis, William Robinson, Rene Gonzalez, Nathan Pearlman, Martin McCarter
BACKGROUND: Lymph nodes are an important part of the immune system and the size of the lymph node reflects local immunologic activity. The purpose of this study was to examine the association between sentinel lymph node (SLN) size and the presence of nodal metastasis in patients with melanoma. METHODS: Retrospective review of a prospectively maintained database of patients undergoing SLN biopsy for cutaneous melanoma between February 1995 and January 2013. The maximum pathologic diameter and the volume of the largest node was used...
August 2016: American Journal of Surgery
https://www.readbyqxmd.com/read/26663842/structure-elucidation-antimicrobial-and-cytotoxic-activities-of-a-halimane-isolated-from-vellozia-kolbekii-alves-velloziaceae
#20
Carmelita G Silva, Helvécio M Santos Júnior, Jussara P Barbosa, Gisela L Costa, Felipe A R Rodrigues, Denilson F Oliveira, Letícia V Costa-Lotufo, Ruy J V Alves, Elis C A Eleutherio, Claudia M Rezende
A new halimane diterpene was isolated from Vellozia kolbekii Alves (Velloziaceae) and identified as (5R,8R,9S,13R)-halim-1,10-ene-15,16-diol (1). It showed cytotoxicity against three human cancer cell lines, SF-295 (glioblastoma), MDA-MB-435 (melanoma), and HCT-8 (colon adenocarcinoma). In the mechanism of cytotoxic action, halimane 1 interferes in two major phases of the cell cycle: in S phase, in which DNA synthesis occurs and where it is very sensitive to damage, and G2M phase which is the phase of preparation for mitosis and mitosis itself, showing apoptosis-inducing properties...
December 2015: Chemistry & Biodiversity
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