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Skin pathology

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https://www.readbyqxmd.com/read/29458120/major-role-for-trpv1-and-insp3r-in-par-2-elicited-inflammatory-mediator-production-in-differentiated-human-keratinocytes
#1
Olivier Gouin, Killian L'Herondelle, Paul Buscaglia, Christelle Le Gall-Ianotto, Réginald Philippe, Nelig Legoux, Olivier Mignen, Virginie Buhé, Raphael Leschiera, Mehdi Sakka, Nathalie Kerfant, Jean-Luc Carré, Raphaele Le Garrec, Luc Lefeuvre, Nicolas Lebonvallet, Laurent Misery
Proteinase-activated receptor-2 (PAR-2) activation in basal keratinocytes stimulates inflammation via the Ca2+ -dependent production of mediators such as interleukin (IL)-1β, tumor necrosis factor (TNF)-α and thymic stromal lymphopoietin (TSLP). In this study, we investigated PAR-2 calcium signaling and the consequent production of inflammatory mediators in differentiated human primary keratinocytes (DhPKs). Stimulation with the PAR-2 activating peptide SLIGKV promoted Ca2+ store depletion in both undifferentiated human primary keratinocytes (UhPKs) and DhPKs...
February 16, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29457268/the-lymphoid-cell-network-in-the-skin
#2
REVIEW
Shweta Tikoo, Rohit Jain, Angela R M Kurz, Wolfgang Weninger
Cutaneous immunity represents a crucial component of the mammalian immune response. The presence of a large array of commensal microorganisms along with a myriad of environmental stresses necessitates constant immuno-surveillance of the tissue. To achieve a perfect balance between immune-tolerance and immune-activation, the skin harbours strategically localised immune cell populations that modulate these responses. To maintain homeostasis, innate and adaptive immune cells assimilate microenvironmental cues and coordinate cellular and molecular functions in a spatiotemporal manner...
February 19, 2018: Immunology and Cell Biology
https://www.readbyqxmd.com/read/29457011/trichoscopic-features-of-linear-morphea-on-the-scalp
#3
David Saceda-Corralo, Antonella Tosti
Linear scleroderma en coup de sabre (LSCS) is the most common form of morphea on the scalp and its trichoscopic features have not been described yet. We report 2 adult women with LSCS with distinct dermoscopic findings. They both had an atrophic well-defined linear patch of alopecia on the frontotemporal scalp. Dermoscopy showed loss of follicular openings on a whitish skin surface; scattered black dots, broken hairs, and pili torti; and short thick linear and branching tortuous vessels on the periphery of the lesion...
January 2018: Skin Appendage Disorders
https://www.readbyqxmd.com/read/29456817/s100a9-aggravates-bleomycin-induced-dermal-fibrosis-in-mice-via-activation-of-erk1-2-mapk-and-nf-%C3%AE%C2%BAb-pathways
#4
Xue Xu, Zhiyong Chen, Xiaoxia Zhu, Dandan Wang, Jun Liang, Cheng Zhao, Xuebing Feng, Jiucun Wang, Hejian Zou, Lingyun Sun
Objectives: This study aims to investigate the pathogenicity and possible mechanisms of S100A9 function in mice models of scleroderma. Materials and Methods: The content of S100A9 in the skin tissues of mice with scleroderma was determined. Different concentrations of bleomycin (BLM) and S100A9 were subcutaneously injected into the backs of mice simultaneously, and then pathological changes in the skin of these mice were monitored. Specifically, the levels of inflammatory cytokines and alpha smooth muscle actin (α-SMA), the activation of extracellular regulated kinase 1/2 (ERK1/2), mitogen-activated protein kinase (MAPK) and nuclear factor-kappa B (NF-κB) pathways, and the expression of the receptor for advanced glycation end-product (RAGE) in the skin were determined...
February 2018: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29456618/an-unusual-presentation-of-adult-t-cell-leukemia-lymphoma
#5
Mohammed Tag-Adeen, Keiichi Hashiguchi, Yuko Akazawa, Ken Ohnita, Sawayama Yasushi, Niino Daisuke, Kazuhiko Nakao
Adult T-cell Leukemia/Lymphoma (ATL) is a rare disease, related to human T-lymphotropic virus-1 (HTLV-1) and presented mainly in adulthood by generalised lymphadenopathy, hepatosplenomegaly, skin lesions and hypercalcaemia, with rare gastrointestinal and/or oral manifestations. We reported this case to raise awareness and demonstrate the therapeutic challenges of this rare disease. A 49-year-old Japanese female presented with skin papules on both forearms, painful mouth ulcers and multiple neck swellings since early February 2017...
2018: Ecancermedicalscience
https://www.readbyqxmd.com/read/29455242/heightened-cxcr4-and-cxcl12-expression-in-nf1-associated-neurofibromas
#6
Beren Karaosmanoglu, Çetin Y Kocaefe, Figen Söylemezoğlu, Banu Anlar, Ali Varan, İbrahim Vargel, Sükriye Ayter
BACKGROUND: Neurofibromatosis type 1 (NF1) is a common autosomal dominantly inherited disorder that affects both the skin and the nervous system. NF1 occurs due to the mutations in the NF1 gene. Neurofibromas are the most common Schwann cell-based tumors in NF1 patients, which are mainly categorized into dermal and plexiform neurofibromas. Studies on different tumor types demonstrate that CXCR4 expression increases in tumor tissues and is linked to metastasis and cancer progression. PURPOSE: In the present study, we aimed to analyze the gene expression of CXCR4, and its ligand CXCL12, in human neurofibromas...
February 17, 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29455176/late-diagnosis-a-case-of-rapidly-progressive-extranodal-nk-t-cell-lymphoma-nasal-type
#7
Hiroyuki Mori, Kei Ebisawa, Mitsushige Nishimura, Kenji Kanazawa
Extranodal natural killer (NK)/T cell lymphoma, nasal type is a condition that has poor prognosis. Accurate diagnosis of lymphoma is made by pathological findings. We report a case of extranodal NK/T cell lymphoma, nasal type affecting the lung and liver and which was difficult to diagnose because of negative biopsy results from multiple sites. A 39-year-old man who had dry cough and fever for 1 month was referred to our hospital. He had pancytopenia and elevated serum levels of lactate dehydrogenase and soluble interleukin-2 receptor...
February 17, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29452323/burr-hole-surgery-for-chronic-subdural-hematoma-with-extensive-scalp-burn-a-case-report
#8
Eijiro Echizen, Kei Miyata, Ken Yamashita, Takeshi Mikami, Eichi Narimatsu, Nobuhiro Mikuni
BACKGROUND: Neurosurgical intervention for a patient with an extensive scalp burn is rare, but it might be associated with the high risk of surgical site infection. CASE DESCRIPTION: An 80-year-old man had a severe and extensive scalp burn. A chronic subdural hematoma (CSDH) was observed on a head CT for the assessment of bacteremia during treatment in the intensive care unit. To evaluate whether the CSDH might underlie his prolonged fever and sepsis pathology, we urgently evacuated the hematoma using one burr hole...
February 13, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29449841/langerhans-cells-sensing-the-environment-in-health-and-disease
#9
REVIEW
Julie Deckers, Hamida Hammad, Esther Hoste
In the last few decades, our understanding of Langerhans cells (LCs) has drastically changed based on novel findings regarding the developmental origin and biological functions of these epidermis-specific resident immune cells. It has become clear that LCs not only exert pivotal roles in immune surveillance and homeostasis but also impact on pathology by either inducing tolerance or mediating inflammation. Their unique capabilities to self-renew within the epidermis, while also being able to migrate to lymph nodes in order to present antigen, place LCs in a key position to sample the local environment and decide on the appropriate cutaneous immune response...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29449723/an-outbreak-of-cutaneous-leishmaniasis-in-modena-province-northern-italy-report-of-35-cases
#10
A M Cesinaro, S Nosseir, E Mataca, M C Mengoli, C Cavatorta, W Gennari
Canine Leishmaniasis is a disease endemic in many parts of Europe, carried by insects of phlebotomous species. Humans are occasional hosts of the parasites. Cases of human leishmaniasis have been registered in Italy, particularly in the southern and coastal regions. In the period 1997-2016, we collected a series of 35 patients affected by cutaneous leishmaniasis, uncovered by skin biopsy and histological examination, 21 of them found in last 3 years. The patients, 28 males and 7 female, aged between 19 and 91, resided in a restricted area of Northern Italy, and none, but two, had travelled abroad...
December 2017: Pathologica
https://www.readbyqxmd.com/read/29447111/free-light-chains-of-immunoglobulins-in-patients-with-systemic-sclerosis-correlations-with-lung-involvement-and-inflammatory-milieu
#11
Silvia Bosello, Umberto Basile, Enrico De Lorenzis, Francesca Gulli, Giovanni Canestrari, Cecilia Napodano, Federico Parisi, Krizia Pocino, Clara Di Mario, Barbara Tolusso, Gianfranco Ferraccioli, Elisa Gremese
AIM: Humoral immunity and B cells are thought to play an important role in the pathophysiology of the systemic sclerosis (SSc). The production of free light chains (FLC) of immunoglobulins is abnormally high in several pathological autoimmune conditions and reflects B cell activation. Furthermore, FLCs demonstrated different biological activities including their capability to modulate the immune system, proteolytic activity and complement cascade activation. The aims of this study are to determine the FLC levels in patients with SSc compared with healthy controls (HC) and to study their possible association with organ involvement and disease characteristics...
January 31, 2018: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/29444177/kidney-differentiated-cells-derived-from-lowe-syndrome-patient-s-ipscs-show-ciliogenesis-defects-and-six2-retention-at-the-golgi-complex
#12
Wen-Chieh Hsieh, Swetha Ramadesikan, Donna Fekete, Ruben Claudio Aguilar
Lowe syndrome is an X-linked condition characterized by congenital cataracts, neurological abnormalities and kidney malfunction. This lethal disease is caused by mutations in the OCRL1 gene, which encodes for the phosphatidylinositol 5-phosphatase Ocrl1. While in the past decade we witnessed substantial progress in the identification and characterization of LS patient cellular phenotypes, many of these studies have been performed in knocked-down cell lines or patient's cells from accessible cell types such as skin fibroblasts, and not from the organs affected...
2018: PloS One
https://www.readbyqxmd.com/read/29441291/nail-biopsy-a-user-s-manual
#13
REVIEW
Chander Grover, Shikha Bansal
Nail biopsy is a procedure not routinely resorted to; but when indicated, it is often the only clue left for diagnosis. At such times, it pays to be conversant with it. It is an investigation that not only provides etiologic, diagnostic, and prognostic information but also aids in understanding the pathogenesis of nail diseases. It can be of therapeutic value, especially with respect to nail tumors. This article compiles the procedural techniques for nail biopsy of various types and attempts to summarize the evidence available in the literature...
January 2018: Indian Dermatology Online Journal
https://www.readbyqxmd.com/read/29441097/the-feasibility-of-using-ultrasound-during-follow-up-for-superficial-non-melanoma-skin-cancers-after-electronic-brachytherapy
#14
Uma Goyal, Justin Suszko, Baldassarre Stea
Purpose: Non-melanoma skin cancers (NMSCs) can be treated with a number of modalities including surgery, topical chemotherapy, or radiotherapy. Amongst the radiotherapeutic options, electronic brachytherapy (eBT) is an appealing treatment as it is usually given in a few fractions, it leads to good outcomes, and is increasingly being used. However, currently no follow-up imaging is routinely used or recommended to evaluate treatment response of NMSC. We aimed to use ultrasound (US) in follow-up after eBT for superficial NMSC to assess its feasibility in detecting possible tumor response...
December 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/29440960/acral-acroma-malignant-melanoma-a-clinical-case-report-and-review-of-literature
#15
Corina-Maria Botici, Lăcrimioara Covaci, Claudia Judea-Pusta, Andrei Paşcalău
Objective: The main objective of this paper is to emphasize the importance of the early diagnosis of certainty in the cases of acral-acroma malignant melanoma in order to increase the survival rate. Method: The paper is a review of specialty literature and presents a clinical case of acral-acroma malignant melanoma. Clinical case: acral-acroma malignant melanoma with confirmed lymph node metastases and possibly secondary remote dissemination to the skin in a male patient aged 16 years...
2018: Clujul Medical (1957)
https://www.readbyqxmd.com/read/29438165/histologic-features-of-gastrointestinal-tract-biopsies-in-iga-vasculitis-henoch-sch%C3%A3-nlein-purpura
#16
Christine Y Louie, Adam J Gomez, Richard K Sibley, Dorsey Bass, Teri A Longacre
Immunoglobulin A (IgA) vasculitis or Henoch-Schönlein purpura (HSP) typically occurs in the pediatric population, although rare cases also occur in adults. Gastrointestinal (GI) involvement is common. The "classic" histologic finding in IgA vasculitis (HSP) is leukocytoclastic vasculitis (LCV); other histologic features in biopsies of IgA vasculitis (HSP) have only been rarely described. The pathology archival files at our institution were searched for GI biopsies from patients with IgA vasculitis (HSP)...
February 12, 2018: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29438146/the-characterization-of-plantar-skin-across-environmental-condition-and-time
#17
Deborah M Wendland, Stephen H Sprigle
OBJECTIVE: In the presence of pathologic conditions such as diabetes or neuropathy and activity-related forces, the plantar surface of the foot is a common place for skin breakdown. With this risk, foundational knowledge of typical plantar skin behavior is needed. The purpose of this study was to characterize the plantar skin properties (tangential stiffness, normal compliance, and thickness) across environmental condition and time. DESIGN AND SETTING: Nonexperimental laboratory design...
March 2018: Advances in Skin & Wound Care
https://www.readbyqxmd.com/read/29437186/evaluation-of-igg4-plasma-cell-infiltration-in-patients-with-systemic-plasmacytosis-and-other-plasma-cell-infiltrating-skin-diseases
#18
Shintaro Takeoka, Masahiro Kamata, Carren Sy Hau, Mihoko Tateishi, Saki Fukaya, Kotaro Hayashi, Atsuko Fukuyasu, Takamitsu Tanaka, Takeko Ishikawa, Takamitsu Ohnishi, Yuko Sasajima, Shinichi Watanabe, Yayoi Tada
Systemic plasmacytosis is a rare skin disorder characterized by marked infiltration of plasma cells in the dermis. IgG4-related disease is pathologically characterized by lymphoplasmacytic infiltration rich in IgG4+ plasma cells, storiform fibrosis, and obliterative phlebitis, accompanied by elevated levels of serum IgG4. Reports of cases of systemic plasmacytosis with abundant infiltration of IgG4+ plasma cells has led to discussion about the relationship between systemic plasmacytosis and IgG4-related disease...
February 13, 2018: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/29436726/molecular-testing-practices-and-perceptions-among-dermatopathologists
#19
Kristin Torre, Preeti Jhorar, Rong Wu, John Pfeifer, Zendee Elaba, Michael Murphy
BACKGROUND: We evaluated how dermatopathologists are employing molecular testing in the setting of neoplastic skin diseases, and assess their opinions of the broader role and utility of molecular technologies in clinical practice. METHODS: A 15-question online survey was sent to Fellows of the American Society of Dermatopathology in April 2017. RESULTS: One hundred and thirty-six dermatopathologists completed the survey (response rate = 16%)...
February 13, 2018: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/29435520/chronic-non-suppurative-mandibular-osteomyelitis-with-proliferative-periostitis-a-review
#20
Ihsène Taihi, Loredana Radoi
Chronic non-suppurative osteomyelitis (CNSO) is a chronic bone disease and may be associated with a reparative periosteum entity called proliferative periostitis (PP). This condition rarely affects the maxillofacial region. Mandibular cases were already described for an infectious dental cause, often with an "onion skin" radiographic aspect, but some rare reported cases showed no obvious etiology. They represent a challenge for diagnosis because of possible misdiagnosis leading to unsuccessful or inappropriate treatment attempts...
February 12, 2018: Quintessence International
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