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Cutaneous immunohistochemistry

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https://www.readbyqxmd.com/read/28640738/evaluation-of-the-effect-and-mechanism-of-action-of-local-phenytoin-in-treatment-of-vitiligo
#1
Asmaa Gaber Abdou, Mohammed Abdelwahed Gaber, Nada Farag Elnaidany, Ayat Elnagar
There are many theories explaining vitiligo such as genetic, autoimmune, neural, free radicals, biochemical, intrinsic defect, melanocytorrhagy and convergent theories. Phenytoin is a widely used anticonvulsant, which is used in cutaneous medicine for treatment of ulcers and epidermolysis bullosa. The aim of this study is to assess the effectiveness of topical phenytoin gel in treatment of vitiligo patients and explaining the underlying mechanism using immunohistochemistry for evaluation of HMB45, CD4 and CD8...
June 22, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28631652/primary-cutaneous-large-b-cell-lymphoma-of-scalp-case-report-of-a-rare-variant
#2
Yasmeen Khatib, Madhura Dande, Richa D Patel, Meena Makhija
Primary cutaneous large B-cell lymphoma (Bcl) is defined as a lymphoma composed of large cells constituting more than 80% of the infiltrate and absence of extracutaneous involvement after staging investigations. In the new World Health Organization/European Organization for Research and Treatment of Cancer classification, cutaneous Bcls with large cells are of three types - primary cutaneous large Bcl leg type (PCLBCLLT), primary cutaneous follicle center lymphoma diffuse type (PCFCLDT), and primary cutaneous large Bcls other (PCLBCLO)...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28622428/cutaneous-pseudomyogenic-epithelioid-sarcoma-like-hemangioendothelioma-fosb-immunohistochemistry-demonstrating-the-serpine1-fosb-fusion-gene
#3
Victoria Alegría-Landa, Carlos Santonja, Margarita Jo-Velasco, Heinz Kutzner, Luis Requena
Pseudomyogenic hemangioendothelioma is a distinctive vascular neoplasm characterized by a multicentric presentation that mostly involves the lower extremities of young adults. Histopathologic resemblance to epithelioid sarcoma and co-expression of both keratins and endothelial markers are its hallmarks. A specific SERPINE1-FOSB fusion gene derived from t(7;19)(q22;q13) with significantly higher FOSB mRNA expression in neoplastic cells is the characteristic cytogenetic anomaly of this tumor. This article is protected by copyright...
June 16, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28609342/cutaneous-collagenous-vasculopathy-report-of-two-cases-presenting-as-disseminated-telangiectasias-and-review-of-the-literature
#4
Laure Bondier, Mathilde Tardieu, Perrine Leveque, Isabelle Challende, Nicole Pinel, Marie T Leccia
Cutaneous collagenous vasculopathy is a recently described idiopathic microangiopathy characterized by acquired diffuse cutaneous telangiectasias and specific histological features: dilated capillaries in the superficial dermis, with walls thickened by hyaline material containing collagen IV by immunohistochemistry. The authors describe 2 cases and review all cases reported in the literature to date, 34 cases including our own. Cases were mainly observed in women (sex ratio 0.41), median age 63.5 (16-85). Hypertension and diabetes seem more frequent in these patients than in the general population...
June 1, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28608404/apoptotic-intrinsic-pathway-proteins-predict-survival-in-canine-cutaneous-mast-cell-tumours
#5
C N Barra, B M Macedo, K G Cadrobbi, L H Pulz, G C Huete, S R Kleeb, J G Xavier, J L Catão-Dias, A T Nishiya, H Fukumasu, R F Strefezzi
Mast cell tumours (MCTs) are the most frequent canine round cell neoplasms and show variable biological behaviours with high metastatic and recurrence rates. The disease is treated surgically and wide margins are recommended. Adjuvant chemotherapy and radiotherapy used in this disease cause DNA damage in neoplastic cells, which is aimed to induce apoptotic cell death. Resisting cell death is a hallmark of cancer, which contributes to the development and progression of tumours. The aim of this study was to investigate the expression of the proteins involved in the apoptotic intrinsic pathway and to evaluate their potential use as prognostic markers for canine cutaneous MCTs...
June 13, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28607924/hipk2-overexpression-and-its-prognostic-role-in-human-papillomavirus-positive-tonsillar-squamous-cell-carcinoma
#6
Mi Jung Kwon, So Young Kang, Eun Sook Nam, Seong Jin Cho, Young-Soo Rho
Tonsillar squamous cell carcinomas (TSCCs) are the most common human papillomavirus- (HPV-) associated oropharyngeal cancers with poor prognosis. Homeodomain-interacting protein kinase 2 (HIPK2) is a central regulator of p53, which participates in apoptosis during the DNA damage response. HIPK2 is involved in HPV-associated uterine cervical and cutaneous carcinogenesis through its binding of HPV E6, thereby preventing apoptosis and contributing to tumor progression. However, its clinical and prognostic significance in TSCC remains unclear...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28604230/primary-cutaneous-post-liver-transplant-lymphoproliferative-disorder-ptld-successfully-treated-with-radiotherapy
#7
Aizuri Murad, Kieran Sheahan, Brian Kirby
A post liver transplant patient developed lesions with the clinical features suggestive of SCC-in-situ on his face and chest which occurred simultaneously since six months prior to his presentation. Skin histopathology confirmed the diagnosis of SCC-in-situ with additional plasmalymphocytic infiltrate in the dermis. Immunohistochemistry with his clinical presentation were in keeping with primary cutaneous post-transplant lymphoproliferative disorder (PTLD). He did not have any systemic involvement. Lesions were treated with radiotherapy with good response...
June 12, 2017: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/28584377/neurolymphomatosis-in-primary-cutaneous-cd4-pleomorphic-small-medium-sized-t-cell-lymphoma-mimicking-hansen-s-disease
#8
Anza Khader, Mary Vineetha, Mamatha George, Shiny Padinjarayil Manakkad, Sunitha Balakrishnan, Uma Rajan
Neurolymphomatosis (NL) refers to nerve infiltration by neurotropic neoplastic cells in the setting of a known or an unknown hematological malignancy. It typically presents as painful or painless peripheral mononeuropathy, mononeuritis multiplex, polyneuropathy, polyradiculopathy, or cranial neuropathy. A 32-year-old male presented with a hyperpigmented hypoesthetic plaque over the anterolateral aspect of the right leg with thickening of the right common peroneal nerve and foot drop clinically diagnosed as Hansen's disease...
May 2017: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/28580633/smad7-positively-regulates-keratinocyte-proliferation-in-psoriasis
#9
D Di Fusco, F Laudisi, V Dinallo, I Monteleone, A Di Grazia, I Marafini, E Troncone, A Colantoni, A Ortenzi, C Stolfi, M Picardo, G Monteleone
BACKGROUND: Transforming growth factor (TGF)-β1 exerts inhibitory effects on keratinocyte proliferation. OBJECTIVES: To examine whether Smad7, a known inhibitor of TGF-β1 signalling, is involved in the psoriasis-associated keratinocyte hyper-proliferation. METHODS: Smad7 was evaluated in skin sections of psoriatic patients and healthy controls and in mice with Aldara-induced skin pathology by real-time PCR and immunohistochemistry. To assess whether Smad7 positively regulates the in vivo keratinocyte growth, mice treated with Aldara received daily cutaneous administration of Smad7 antisense oligonucleotide (AS)...
June 5, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28578692/comprehensive-dna-methylation-study-identifies-novel-progression-related-and-prognostic-markers-for-cutaneous-melanoma
#10
Jasper Wouters, Miguel Vizoso, Anna Martinez-Cardus, F Javier Carmona, Olivier Govaere, Teresa Laguna, Jesuchristopher Joseph, Peter Dynoodt, Claudia Aura, Mona Foth, Roy Cloots, Karin van den Hurk, Balazs Balint, Ian G Murphy, Enda W McDermott, Kieran Sheahan, Karin Jirström, Bjorn Nodin, Girish Mallya-Udupi, Joost J van den Oord, William M Gallagher, Manel Esteller
BACKGROUND: Cutaneous melanoma is the deadliest skin cancer, with an increasing incidence and mortality rate. Currently, staging of patients with primary melanoma is performed using histological biomarkers such as tumor thickness and ulceration. As disruption of the epigenomic landscape is recognized as a widespread feature inherent in tumor development and progression, we aimed to identify novel biomarkers providing additional clinical information over current factors using unbiased genome-wide DNA methylation analyses...
June 5, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28560743/occurrence-of-bap1-germline-mutations-in-cutaneous-melanocytic-tumors-with-loss-of-bap1-expression-a-pilot-study
#11
Odile Cabaret, Emilie Perron, Brigitte Bressac-de Paillerets, Nadem Soufir, Arnaud de la Fouchardière
Melanocytic BAP1-associated intradermal tumors (MBAITs) can either be sporadic or associated with a cancer-predisposition syndrome. In this study we explored the clinical status of 136 patients in which at least one MBAIT was found. 49/136 (36%) of them gave their signed consent for an oncogenetic BAP1 blood test. 28/136 patients (20%) diagnosed with an MBAIT had other MBAITs and/or a personal or familial history of BAP1-related cancers that could clinically designate them as potential carriers of a BAP1 germline mutation...
May 30, 2017: Genes, Chromosomes & Cancer
https://www.readbyqxmd.com/read/28559985/peptide-modified-chitosan-hydrogels-promote-skin-wound-healing-by-enhancing-wound-angiogenesis-and-inhibiting-inflammation
#12
Xionglin Chen, Min Zhang, Xueer Wang, Yinghua Chen, Yuan Yan, Lu Zhang, Lin Zhang
Cutaneous wound healing following trauma is a complex and dynamic process involving multiple overlapping events following trauma. Two critical elements affecting skin wound healing are neovascularization and inflammation. A nascent vessel can provide nutrition and oxygen to a healing wound. Therefore, treatments strategies that enhance angiogenesis and inhibit inflammation can promote skin wound healing. Previous studies have shown that the SIKVAV peptide (Ser-Ile-Lys-Val-Ala-Val) from laminin can promote angiogenesis in vitro...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28555886/lymphatic-invasion-predicts-sentinel-lymph-node-metastasis-and-adverse-outcome-in-primary-cutaneous-melanoma
#13
Andrea P Moy, Mark C Mochel, Alona Muzikansky, Lyn M Duncan, Stefan Kraft
BACKGROUND: Sentinel lymph node (SLN) metastasis is a powerful predictor of survival in primary cutaneous melanoma. Lymphatic invasion (LI) may correlate with increased risk of SLN metastasis. Intralymphatic metastases, often difficult to detect on hematoxylin and eosin (H&E) stained sections, are readily identified with dual immunohistochemistry for melanocytic and lymphatic markers. METHODS: We used dual S100/D240 immunohistochemistry to detect LI in 125 melanomas from patients who underwent SLN biopsy and correlated LI with melanoma staging parameters and disease status...
May 29, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28552016/syringoid-eccrine-carcinoma-of-the-foot-report-of-a-rare-cutaneous-adnexal-neoplasm
#14
Woo Cheal Cho, Brian Wagner, Melissa Gulosh, Zendee Elaba
Syringoid eccrine carcinoma is a rare malignant adnexal tumor that typically presents in the head and neck region. Involvement of the extremities is uncommon, with only a few cases reported in the literature. Here, we report our experience with a rare case of syringoid eccrine carcinoma occurring on the plantar surface of the right foot in a 47-year-old African American woman. Histologically, incisional biopsy revealed a tumor consisting of tubulocystic structures lined by basaloid cells with an infiltrative growth pattern, extending from the reticular dermis to the deep biopsy margin...
May 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28549035/expression-of-ki-67-and-estrogen-receptor-beta-in-primary-cutaneous-melanoma-as-a-potential-indicator-of-regional-lymph-node-positivity
#15
Dalma Udovicic-Gagula, Amina Ahmovic, Nurija Bilalovic, Mirsad Doric
In the early stages of cutaneous malignant melanoma (MM), it is extremely difficult to predict adequately the risk from hematogenic and lymphatic metastasis. We investigate whether the immunohistochemical expression of Ki-67 and estrogen receptor beta (ERβ) in cells of MM could predict the status of regional lymph nodes. A total of 55 tissue samples of primary cutaneous melanomas with known status of regional lymph nodes were retrospectively evaluated for Ki-67 and ERβ expression by quantitative immunohistochemistry and then correlated with the status of regional lymph nodes and relevant clinicopathologic parameters...
May 25, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28548901/neuroendocrine-differentiation-in-basal-cell-carcinoma
#16
Yoldez Houcine, Ines Chelly, Alia Zehani, Linda Belhaj Kacem, Haifa Azzouz, Wafa Rekik, Hend C, Slim Haouet, Nidhameddine Kchir
Basal cell carcinoma (BCC) is the prototypical basaloid tumor of the skin. It may show various patterns simulating other cutaneous tumors due to its pleomorphism. It may have an unusal pattern of differentiation such as squamous, sebaceous, apocrine, eccrine, pilar, and endocrine differentiation. In order to establish the relative frequency of neuroendocrine differentiation in BCC, we performed a retrospective study of 33 consecutive BCCs using conventional immunohistochemistry with two neuroendocrine antibodies: Chromogranine A and synaptophysine...
May 26, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28538743/pathophysiology-of-hidradenitis-suppurativa
#17
Lauren K Hoffman, Mondana H Ghias, Michelle A Lowes
The pathophysiology of hidradenitis suppurativa (HS) is not well understood. Some of our knowledge comes from clinical and epidemiological observations, along with studies of the histopathology and immunohistochemistry of affected skin. More recently, cutaneous molecular studies and transcriptomic analyses have provided additional information regarding inflammatory processes. The chronic cutaneous inflammation, systemic symptoms, and associated comorbidities suggest that HS should be classified as an immune-mediated disease, rather than a primary infectious disease...
June 2017: Seminars in Cutaneous Medicine and Surgery
https://www.readbyqxmd.com/read/28532795/host-cell-tropism-genome-characterization-and-evolutionary-features-of-oapv4-a-novel-deltapapillomavirus-identified-in-sheep-fibropapilloma
#18
Gessica Tore, Carla Cacciotto, Antonio Giovanni Anfossi, Gian Mario Dore, Elisabetta Antuofermo, Alessandra Scagliarini, Giovanni Pietro Burrai, Salvatore Pau, Maria Teresa Zedda, Gerolamo Masala, Marco Pittau, Alberto Alberti
Investigating papillomavirus (PV) diversity is crucial to fully comprehend pathogenicity, genetic features, and evolution of taxa hosted by domestic and wild animal species. This study reports the identification of OaPV4, a novel ovine PV type within Deltapapillomaviruses 3. The study of OaPV4 genomic features combined to in situ hybridization and immunohistochemistry investigations allowed extrapolating several general biological features of ovine PVs, such as their cellular tropism, pathogenicity, and evolutionary history...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28532580/sirt1-ameliorates-systemic-sclerosis-by-targeting-the-mtor-pathway
#19
Xiaoxia Zhu, Haiyan Chu, Shuai Jiang, Qingmei Liu, Lei Liu, Yu Xue, Shucong Zheng, Weiguo Wan, Jianhua Qiu, Jiucun Wang, Hejian Zou
BACKGROUND: Systemic sclerosis (SSc) is a chronic autoimmune disease characterized by inflammation and fibrosis. Our previous research has indicated that Sirtuin1 (Sirt1) plays a role in the regulation of TNF-α-induced inflammation; however, whether Sirt1 may inhibit the progress of SSc by blocking inflammation remains unknown. OBJECTIVE: We aimed to investigate the function of Sirt1 in SSc. METHODS: The function and its mechanism of Sirt1 were evaluated in fibroblasts or scleroderma mice...
May 3, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28529555/detection-of-p53-and-bcl-2-expression-in-cutaneous-hemangioma-through-the-quantum-dot-technique
#20
Tian Tang, Duan-Lian Zhang
Hemangioma is one of the most common types of infantile vascular benign tumor. The aim of the present study was to investigate the role of B-cell lymphoma 2 (Bcl-2) and tumor protein p53 (p53) in the proliferation and apoptosis of hemangioma cells. A total of 38 paraffin-embedded hemangioma specimens (16 males and 22 females) and another 5 paraffin-embedded healthy surrounding tissue samples, collected between January 2007 and December 2010, were obtained from the Department of Pathology at Renmin Hospital of Wuhan University (Wuhan, China)...
May 2017: Oncology Letters
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