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Cutaneous pathology

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https://www.readbyqxmd.com/read/27920655/deep-vein-thrombosis-as-initial-manifestation-of-whipple-disease
#1
Mônica Souza de Miranda Henriques, Alexandre Rolim da Paz, Ana Beatriz Person Gaertner, Cibelle Ingrid Stephen Melo, Priscyanne Lins Filgueiras, Rafaella Alencar Jerome
INTRODUCTION: Wipple disease (WD) is a rare chronic disease caused by the bacillus Tropheryma whipplei. Constitutive, rheumatologic, gastrointestinal, cardiac, cerebral, lymphatic, cutaneous, and ophthalmological signs are possible systemic symptoms. However, thrombotic manifestations are rarely described as "stroke-like syndrome" or arterial thrombosis. Diagnosis is based on clinical manifestations and pathological examination. Laboratory findings may include anemia, leukocytosis, and thrombocytosis...
September 2016: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/27920565/electrochemotherapy-induces-apoptotic-death-in-melanoma-metastases-a-histologic-and-immunohistochemical-investigation
#2
Laura Bigi, Giovanna Galdo, Anna Maria Cesinaro, Cristina Vaschieri, Alessandra Marconi, Carlo Pincelli, Fabrizio Fantini
BACKGROUND: Electrochemotherapy (ECT) is increasingly used in the treatment of primary and secondary skin tumors, but little is known about the pathologic mechanism responsible for tumor cell destruction in humans. Knowledge of detailed mechanism of host response after ECT may improve the treatment efficacy related to patient selection and technique refinements. AIM: The aim of the study was to investigate the histopathology and mechanism of cell death after ECT in cutaneous melanoma metastases...
2016: Clinical, Cosmetic and Investigational Dermatology
https://www.readbyqxmd.com/read/27920272/mcpip1-regnase-1-restricts-il-17a-and-il-17c-dependent-skin-inflammation
#3
Leticia Monin, Johann E Gudjonsson, Erin E Childs, Nilesh Amatya, Xianying Xing, Akash H Verma, Bianca M Coleman, Abhishek V Garg, Meaghan Killeen, Alicia Mathers, Nicole L Ward, Sarah L Gaffen
The IL-17 family cytokines IL-17A and IL-17C drive the pathogenesis of psoriatic skin inflammation, and anti-IL-17A Abs were recently approved to treat human psoriasis. Little is known about mechanisms that restrain IL-17 cytokine-mediated signaling, particularly IL-17C. In this article, we show that the endoribonuclease MCP-1-induced protein 1 (MCPIP1; also known as regnase-1) is markedly upregulated in human psoriatic skin lesions. Similarly, MCPIP1 was overexpressed in the imiquimod (IMQ)-driven mouse model of cutaneous inflammation...
December 5, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27919990/validation-and-enhancement-of-the-clinicopathological-melanoma-nomogram-via-incorporation-of-a-molecular-marker-in-the-primary-tumor
#4
Samer A Naffouje, Rand Naffouje, Jinsong Chen, George I Salti
BACKGROUND/AIM: To validate the melanoma nomogram and improve its function in prediction of nodal dissemination by incorporating a molecular marker in the model. Microphthalmia transcription factor (MITF) is an important regulator of melanocyte homeostasis and differentiation. We have shown that the grade of MITF expression in primary melanoma cells can serve as a predictor of nodal status. Many efforts to identify the nodal spread in cutaneous melanoma using non-invasive means have been recently undertaken...
December 2016: Anticancer Research
https://www.readbyqxmd.com/read/27919252/neoplastic-diseases-in-the-domestic-ferret-mustela-putorius-furo-in-italy-classification-and-tissue-distribution-of-856-cases-2000-2010
#5
Giancarlo Avallone, Annalisa Forlani, Marco Tecilla, Elena Riccardi, Sara Belluco, Sara Francesca Santagostino, Guido Grilli, Kiumars Khadivi, Paola Roccabianca
BACKGROUND: The aim of this study was to describe the prevalence and tissue distribution of neoplasms in Italian ferrets, compared to the epidemiological data previously reported in USA and Japan. METHODS: Signalment and diagnoses of pathological submissions received between 2000 and 2010 were searched; cases with the diagnosis of neoplasm were selected and original sections reviewed to confirm the diagnosis. RESULTS: Nine-hundred and ten samples were retrieved, 690 of which included at least one tumour for a total of 856 tumours...
December 5, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27917120/analysis-of-nociceptive-information-encoded-in-the-temporal-discharge-patterns-of-cutaneous-c-fibers
#6
Kyeongwon Cho, Jun Ho Jang, Sung-Phil Kim, Sang Hoon Lee, Soon-Cheol Chung, In Young Kim, Dong Pyo Jang, Sung Jun Jung
The generation of pain signals from primary afferent neurons is explained by a labeled-line code. However, this notion cannot apply in a simple way to cutaneous C-fibers, which carry signals from a variety of receptors that respond to various stimuli including agonist chemicals. To represent the discharge patterns of C-fibers according to different agonist chemicals, we have developed a quantitative approach using three consecutive spikes. By using this method, the generation of pain in response to chemical stimuli is shown to be dependent on the temporal aspect of the spike trains...
2016: Frontiers in Computational Neuroscience
https://www.readbyqxmd.com/read/27911979/clinicopathological-features-and-clinical-outcomes-associated-with-tp53-and-braf-n-on-v-600-mutations-in-cutaneous-melanoma-patients
#7
Dae Won Kim, Lauren E Haydu, Aron Y Joon, Roland L Bassett, Alan E Siroy, Michael T Tetzlaff, Mark J Routbort, Rodabe N Amaria, Jennifer A Wargo, Jennifer L McQuade, Jan Kemnade, Patrick Hwu, Scott E Woodman, Jason Roszik, Kevin B Kim, Jeffrey E Gershenwald, Alexander J Lazar, Michael A Davies
BACKGROUND: BRAF(V600) , NRAS, TP53, and BRAF(Non-V600) are among the most common mutations detected in non-acral cutaneous melanoma patients. Although several studies have identified clinical and pathological features associated with BRAF(V600) and NRAS mutations, limited data are available regarding the correlates and significance of TP53 and BRAF(Non-V600) mutations. METHODS: This study analyzed the patient demographics, primary tumor features, and clinical outcomes of a large cohort of non-acral cutaneous melanoma patients who had undergone clinically indicated molecular testing (n = 926)...
December 2, 2016: Cancer
https://www.readbyqxmd.com/read/27904177/a-clinicopathological-analysis-of-primary-cutaneous-lymphomas-a-6-year-observational-study-at-a-tertiary-care-center-of-south-india
#8
Anza Khader, Shiny Padinjarayil Manakkad, Mohammed Shaan, Sarita Sasidharan Pillai, Najeeba Riyaz, P Binitha Manikoth, Muhammed Kunnummel, Sunitha Balakrishnan
BACKGROUND: Little data are available concerning clinical and pathological patterns of cutaneous lymphomas in India. AIM: To analyze the clinical and histopathological characteristics of cutaneous lymphomas in Indian patients. MATERIALS AND METHODS: This is a single-center, prospective, observational study carried out from January 1, 2010, to December 31, 2015. The patients underwent clinical examination, human T-cell lymphotropic virus-1 (HTLV-1) screening, skin biopsy with hematoxylin and eosin and immunohistochemistry staining...
November 2016: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/27899960/genetics-and-epigenetics-of-melanoma
#9
Xiao-Ying Zhang, Pei-Ying Zhang
Cancer affects multiple organs in the body Malignant melanoma involves the invasion of skin and occasionally mucosal membrane or eye choroidal tissues. The incidence of cutaneous malignant melanoma is on the increase worldwide and is a major concern in current research. The increase is associated with UV irradiation-induced genetic aberrations that stimulate skin melanocytes to develop unlimited growth. This eventually leads to cell immortality, which in turn causes metastases. The present review examines the genetics and epigenetics of this pathological state together with recent perspectives of the therapeutic management of disease...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27896634/th9-cells-in-skin-disorders
#10
REVIEW
Rachael A Clark, Christoph Schlapbach
Interleukin 9 secreting TH9 cells have been proposed as the latest addition to the family of T helper cell subsets. While a growing body of evidence from animal models points to important roles for these cells in allergic inflammation of the lung, autoinflammation of the gastrointestinal tract, and tumor immunity, their role in skin immunity and skin immunopathology remains poorly defined. Interestingly, studies of T helper cells from healthy humans suggest that TH9 cells are predominantly skin-homing and skin-resident and that they are involved in protection against extracellular pathogens...
November 28, 2016: Seminars in Immunopathology
https://www.readbyqxmd.com/read/27896185/the-relationship-between-the-size-and-the-invasion-depth-of-tumors-in-head-and-neck-cutaneous-squamous-cell-carcinoma
#11
Sam Yong Lee, Won Joo Hwang, Kyung Pil Kim, Hong Min Kim, Jae Ha Hwang, Kwang Seog Kim
BACKGROUND: Cutaneous squamous cell carcinoma (SCC), which occurs in keratinocytes of the epidermis and is the second most common skin cancer, has a more invasive growth pattern and higher potential to metastasize than basal cell carcinoma. Total excision of the primary tumor is the treatment of choice. For clear excision of the tumor, invasion depth is one of the most important factors. This study was conducted to clarify the relationship between the size and the invasion depth of cutaneous SCC...
November 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27895862/cutaneous-angiosarcoma-metastatic-to-small-bowel-with-nodal-involvement
#12
Vidya A Fleetwood, Jamie C Harris, Minh B Luu
A 77-year-old male with a history of metastatic scalp angiosarcoma presented with intractable gastrointestinal bleeding from a jejunal mass detected on capsule endoscopy. He underwent laparoscopic-assisted resection of the mass. Intraoperatively, an isolated small bowel mass with bulky lymphadenopathy was seen and resected en bloc. Pathology showed a 6.8cm high-grade metastatic angiosarcoma with nodal involvement and negative margins. Angiosarcoma is a sarcoma with a grim prognosis. The incidence is 2% of all soft tissue sarcomas; cutaneous lesions comprise 27% of manifestations and usually appear on head and neck...
2016: Gastroenterology and Hepatology From Bed to Bench
https://www.readbyqxmd.com/read/27893841/seroprevalence-of-cutaneous-human-papillomaviruses-and-the-risk-of-external-genital-lesions-in-men-a-nested-case-control-study
#13
Shams Rahman, Dana E Rollison, Christine M Pierce Campbell, Tim Waterboer, Angelika Michel, Michael Pawlita, Luisa L Villa, Eduardo Lazcano Ponce, Wei Wang, Amy R Borenstein, Anna R Giuliano
BACKGROUND: A variety of cutaneous human papillomaviruses (HPV) are detectable in genital epithelial lesions in men and non-melanoma skin cancer patients. It remains unclear whether these viruses are associated causally with skin lesions. To date, no study has prospectively examined the association between cutaneous HPV seropositivity and development of external genital lesions (EGLs) in men. OBJECTIVES: To examine the association between seropositivity to cutaneous HPV types and the risk of subsequent development of EGLs...
2016: PloS One
https://www.readbyqxmd.com/read/27891626/does-trans-spinal-and-local-dc-polarization-affect-presynaptic-inhibition-and-post-activation-depression
#14
D Kaczmarek, J Ristikankare, E Jankowska
Direct current (DC) polarization has been demonstrated to alleviate the effects of various deficits in the operation of the central nervous system. However, the effects of trans-spinal DC stimulation (tsDCS) have been investigated less extensively than the effects of transcranial DC stimulation (tDCS), and their cellular mechanisms have not been elucidated. The main objectives of this study were, therefore, to extend our previous analysis of DC effects on the excitability of primary afferents and synaptic transmission by examining the effects of DC on two spinal modulatory feed-back systems, presynaptic inhibition and post-activation depression, in an anaesthetized rat preparation...
November 28, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27891253/cutaneous-human-papillomavirus-infection-and-development-of-subsequent-squamous-cell-carcinoma-of-the-skin
#15
Shalaka S Hampras, Rhianna A Reed, Spencer Bezalel, Michael Cameron, Basil Cherpelis, Neil Fenske, Vernon K Sondak, Jane Messina, Massimo Tommasino, Tarik Gheit, Dana E Rollison
The role of cutaneous human papillomavirus (HPV) infection in the development of subsequent cutaneous squamous cell carcinoma (SCC) is unknown. Pathologically confirmed cases of SCC (n = 150) enrolled in a previously conducted case-control study were included in a retrospective cohort study to examine the association of cutaneous HPV at the time of SCC diagnosis with the risk of subsequent SCC development. Data on HPV seropositivity, HPV DNA in eyebrow hairs (EB) and SCC tumors were available from the parent study...
2016: Journal of Skin Cancer
https://www.readbyqxmd.com/read/27889195/metastasectomy-in-cutaneous-melanoma
#16
REVIEW
K Lasithiotakis, O Zoras
Metastectomy remains the only treatment in malignant melanoma to offer complete pathologic response within a few days of in-hospital stay. It has been historically associated with the highest survival rates in the literature reported for patients of this stage. However, only a minority of patients are amenable to curative resection of distant metastatic disease. This patient group exhibit slow growing oligometastases as indicated by: a. Long disease free interval after treatment of their primary tumours and b...
November 13, 2016: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/27886404/adipophilin-expression-in-cutaneous-malignant-melanoma
#17
Masakazu Fujimoto, Ibu Matsuzaki, Yuki Yamamoto, Akihiko Yoshizawa, Kenji Warigaya, Yoshifumi Iwahashi, Fumiyoshi Kojima, Fukumi Furukawa, Shin-Ichi Murata
BACKGROUND: The lipogenic pathway is upregulated in cancer cells, including melanomas. However, the pathological significance of cellular lipids in melanocytic lesions has yet to be determined. In this study, we evaluated intracytoplasmic lipid droplets in melanocytic nevi (MNs) and malignant melanomas via immunohistochemical analysis of adipophilin (ADP), which coats lipid droplets. METHODS: One hundred primary cutaneous melanocytic lesions (33 MNs, 17 melanomas in situ [MIS], and 50 invasive melanomas [IMs]) were immunostained for ADP...
November 25, 2016: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/27884329/saphenous-artery-based-flap-models-in-rats-new-flap-designs-for-experimental-studies
#18
Ersin Aksam, Berrak Aksam, Mustafa Erol Demirseren, Huban Sibel Orhun Yavuz
BACKGROUND: Experimental research using laboratory animals provides substantial data about reconstructive surgery. However, the literature does not include any experimental studies that have used flap models on the hind limbs of rats. To gain an understanding of the physiology of lower-extremity flaps and of flap failures, this study assessed the cutaneous perforators of the saphenous artery, and new flap models were designed for the hind limbs of rats. MATERIALS AND METHODS: The experiment was designed to include three stages and used 35 rats...
December 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27879514/primary-cutaneous-t-cell-lymphomas-showing-gamma-delta-%C3%AE-%C3%AE-phenotype-and-predominantly-epidermotropic-pattern-are-clinicopathologically-distinct-from-classic-primary-cutaneous-%C3%AE-%C3%AE-t-cell-lymphomas
#19
E Dean Merrill, Rose Agbay, Roberto N Miranda, Phyu P Aung, Michael T Tetzlaff, Ken H Young, Jonathan L Curry, Priyadharsini Nagarajan, Doina Ivan, Victor G Prieto, L Jeffrey Medeiros, Madeleine Duvic, Carlos A Torres-Cabala
Primary cutaneous gamma-delta (γδ) T-cell lymphoma is a rare disease that typically involves the dermis and subcutis. Cases of primary cutaneous T-cell lymphomas showing γδ phenotype and predominantly epidermotropic pattern (EγδTCL) are not well defined. In this series, cases of primary cutaneous T-cell lymphomas showing γδ phenotype were reviewed and classified as predominantly epidermotropic (EγδTCL) when >75% of lymphoma cells resided in the epidermis or predominantly dermal and/or subcutaneous (DSγδTCL)...
November 22, 2016: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/27873566/pathological-and-phylogenetic-characterization-of-amphibiothecum-sp-infection-in-an-isolated-amphibian-lissotriton-helveticus-population-on-the-island-of-rum-scotland
#20
Caterina Fiegna, Charlotte L Clarke, Darren J Shaw, Johanna L Baily, Frances C Clare, Alexandra Gray, Trenton W J Garner, Anna L Meredith
Outbreaks of cutaneous infectious disease in amphibians are increasingly being attributed to an overlooked group of fungal-like pathogens, the Dermocystids. During the last 10 years on the Isle of Rum, Scotland, palmate newts (Lissotriton helveticus) have been reportedly afflicted by unusual skin lesions. Here we present pathological and molecular findings confirming that the pathogen associated with these lesions is a novel organism of the order Dermocystida, and represents the first formally reported, and potentially lethal, case of amphibian Dermocystid infection in the UK...
November 22, 2016: Parasitology
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