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https://www.readbyqxmd.com/read/29341232/histological-features-and-outcome-of-inverted-type-a-melanocytic-nevi
#1
Soheil S Dadras, Jun Lu, Artur Zembowicz, Thomas J Flotte, Martin C Mihm
The presence of enlarged epithelioid/spindled nests located deep in the reticular dermis of a biphasic melanocytic neoplasm can mimic melanoma arising in a preexisting nevus, causing over-interpretation of malignancy. We aimed to define the clinicopathologic significance of epithelioid/spindled nests in melanocytic nevi. Retrospectively using clinical and histologic information, we characterized 121 patients with a single lesion showing epithelioid/spindled melanocytes in the reticular dermis or subcutaneous fat, surrounded by melanophages, sometimes blending in with the adnexa...
January 17, 2018: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/29333066/new-insights-into-cholangiocarcinoma-multiple-stems-and-related-cell-lineages-of-origin
#2
REVIEW
Maria Consiglia Bragazzi, Lorenzo Ridola, Samira Safarikia, Sabina Di Matteo, Daniele Costantini, Lorenzo Nevi, Vincenzo Cardinale
Cholangiocarcinoma (CCA) is a heterogeneous group of malignancies that may develop at any level of the biliary tree. CCA is currently classified into intrahepatic (iCCA), perihilar (pCCA) and distal (dCCA) on the basis of its anatomical location. Notably, although these three CCA subtypes have common features, they also have important inter- and intra-tumor differences that can affect their pathogenesis and outcome. A unique feature of CCA is that it manifests in the hepatic parenchyma or large intrahepatic and extrahepatic bile ducts, furnished by two distinct stem cell niches: the canals of Hering and the peribiliary glands, respectively...
January 2018: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/29332123/braf-nras-and-gnaq-mutations-in-conjunctival-melanocytic-nevi
#3
Jasmine H Francis, Hans E Grossniklaus, Larissa A Habib, Brian Marr, David H Abramson, Klaus J Busam
Purpose: To evaluate BRAF, NRAS, and GNAQ mutations in surgical specimens of common and blue conjunctival melanocytic nevi. Methods: Surgical specimens from 25 conjunctival melanocytic nevi (23 common and 2 blue) of 25 patients were evaluated. All common nevi were analyzed immunohistochemically for the expression of BRAF V600E or NRAS Q61R. One lesion with negative immunoreactivity and for all blue nevi, a hybridization capture-based next-generation sequencing method was employed for mutation analysis...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29330295/epigenetic-reprogramming-of-pericentromeric-satellite-dna-in-premalignant-and-malignant-lesions
#4
Nadine H Brueckmann, Christina B Pedersen, Henrik J Ditzel, Morten F Gjerstorff
Repression of repetitive DNA is important for maintaining genomic stability, but is often perturbed in cancer. For instance, the megabase satellite domain at chromosome 1q12 is a common site of genetic rearrangements, such as translocations and deletions. Polycomb-group (PcG) proteins can be observed as large subnuclear domains called polycomb bodies, the composition and cellular function of which has remained elusive. This study, demonstrates that polycomb bodies are canonical subunits of the multiprotein polycomb repressive complex 1 (PRC1) deposited on 1q12 pericentromeric satellite DNA, which are normally maintained as constitutive heterochromatin by other mechanisms...
January 12, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29330283/centriole-overduplication-is-the-predominant-mechanism-leading-to-centrosome-amplification-in-melanoma
#5
Ryan A Denu, Maria Shabbir, Minakshi Nihal, Chandra K Singh, B Jack Longley, Mark E Burkard, Nihal Ahmad
Centrosome amplification (CA) is common in cancer and can arise by centriole overduplication or by cell doubling events, including the failure of cell division and cell-cell fusion. To assess the relative contributions of these two mechanisms, the number of centrosomes with mature/mother centrioles was examined by immunofluorescence in a tissue microarray (TMA) of human melanomas and benign nevi (n=79 and 17, respectively). The centrosomal protein 170 (CEP170) was used to identify centrosomes with mature centrioles; this is expected to be present in most centrosomes with cell doubling, but on fewer centrosomes with overduplication...
January 12, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29318273/dermoscopic-patterns-of-spitz-nevi-reply
#6
LETTER
Wei Liu, Jia-Wei Liu, Dong-Lai Ma
No abstract text is available yet for this article.
January 9, 2018: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/29318270/dermoscopic-patterns-of-spitz-nevi
#7
LETTER
Jeffrey L Pollock
No abstract text is available yet for this article.
January 9, 2018: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/29316280/giant-congenital-melanocytic-nevus-with-vascular-malformation-and-epidermal-cysts-associated-with-a-somatic-activating-mutation-in-braf
#8
Heather C Etchevers, Christian Rose, Birgit Kahle, Helmuth Vorbringer, Frédéric Fina, Pauline Heux, Irina Berger, Benjamin Schwarz, Stéphane Zaffran, Nicolas Macagno, Sven Krengel
Giant congenital melanocytic nevi may be symptomatically isolated, or syndromic. Associations with capillary malformations are exceptional, and development of epidermal cysts has not been described. A 71-year old patient with a giant congenital melanocytic nevus of the lower back, buttocks and thighs was asymptomatic except for unexpected hemorrhage during partial surgical excision years before. Blunt trauma at age 64 initiated recurrent, severe pain under the nevus; multiple large epidermal cysts then developed within it...
January 5, 2018: Pigment Cell & Melanoma Research
https://www.readbyqxmd.com/read/29314288/the-limitations-of-dermoscopy-false-positive-and-false-negative-tumors
#9
REVIEW
V Papageorgiou, Z Apalla, E Sotiriou, C Papageorgiou, E Lazaridou, S Vakirlis, D Ioannides, A Lallas
Dermoscopy has been documented to increase the diagnostic accuracy of clinicians evaluating skin tumors, improving their ability to detect skin cancer and better recognize benign moles. However, dermoscopically "false positive" and "false negative" tumors do exist. False positive diagnosis usually leads to unnecessary excisions. False negative diagnosis is much more dangerous, since it might result in overlooking a cancer, with severe undesirable consequences for the patient and the physician. Therefore, management strategies should mainly focus on addressing the risk of dermoscopically false negative tumors...
January 5, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29314272/eruptive-nevi-under-tocilizumab-first-case-report-and-data-analysis
#10
Y Mansour, A Lambert, M Tebacher-Alt, J L Pasquali, D Lipsker
we would like to draw attention to an unusual side effect of tocilizumab (TOC), a humanized monoclonal antibody directed against the interleukin 6 (IL-6) receptor, approved for the treatment of rheumatoid arthritis (RA) and juvenile idiopathic arthritis (JIA). This article is protected by copyright. All rights reserved.
January 5, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29314193/acral-pigmented-spitz-nevus-in-a-child-with-transepidermal-migration-of-melanocytes-dermoscopic-and-reflectance-confocal-microscopic-features
#11
Christopher Iriarte, Babar Rao, Attiya Haroon, Anna Yasmine Kirkorian
Acral pigmented Spitz nevi are seldom reported in the literature. We report a new case on the palm of a 4-year-old girl that demonstrated correlation between features observed on dermoscopy and reflectance confocal microscopy (RCM). Histopathology revealed a benign intraepidermal Spitz nevus with transepidermal elimination of melanocytes that showed on RCM as focal atypical bright cells concerning for malignancy. This case is one of few reports in the literature combining dermoscopy, reflectance confocal microscopy, and histology for an acral Spitz nevi, which are rarely evaluated by RCM given the thickness of the stratum corneum in acral sites...
January 4, 2018: Pediatric Dermatology
https://www.readbyqxmd.com/read/29303780/clinical-and-cytogenetic-features-of-516-patients-with-suspected-turner-syndrome-a-single-center-experience
#12
Annelise B Carvalho, Sofia H V Lemos-Marini, Gil Guerra-Junior, Andréa T Maciel-Guerra
BACKGROUND: Clinical suspicion of Turner syndrome (TS) may be challenging. Short stature and absent puberty are not mandatory and the dysmorphic picture is widely variable. The aim of the study was to describe a representative sample of patients with suspected TS in a single center and to verify which set of features may help discriminate those with TS. METHODS: This was a retrospective study of patients with suspected TS evaluated between 1989 and 2012 with the same clinical and cytogenetic protocols...
January 5, 2018: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/29301474/eruptive-melanocytic-nevi-in-a-patient-with-toxic-epidermal-necrolysis-like-cutaneous-lupus
#13
C Collantes-Rodríguez, D Jiménez-Gallo, C Arjona-Aguilera, L Ossorio-García, I Villegas-Romero, J M Báez-Perea, M Linares-Barrios
No abstract text is available yet for this article.
January 1, 2018: Lupus
https://www.readbyqxmd.com/read/29299693/picosecond-532-nm-neodymium-doped-yttrium-aluminum-garnet-laser-a-promising-modality-for-the-management-of-verrucous-epidermal-nevi
#14
Assi Levi, Dan Ben Amitai, Daniel Mimouni, Yael A Leshem, Ofir Arzi, Moshe Lapidoth
The verrucous epidermal nevus (VEN) is the most common type of epidermal nevi. As lesions can be disfiguring, treatment is often sought. Many therapeutic approaches have been reported, with variable efficacy and safety. Picosecond (PS) lasers are novel laser devices designated to target small chromophores. A side effect of these lasers is blistering due to epidermal-dermal separation. We aimed to harness this side effect of the PS lasers to treat patients with VEN. The purpose of this study was to report our experience treating VEN using a PS 532-nm laser...
January 3, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29285235/eyes-absent-gene-eya1-is-a-pathogenic-driver-and-a-therapeutic-target-for-melanoma
#15
Joshua Jiawei Zhou, Yuanshen Huang, Xue Zhang, Yabin Cheng, Liren Tang, Xiaodong Ma
EYA1 is a DNA repair enzyme that is induced after DNA damage and is upregulated in melanoma. However, its role in pathogenesis and therapeutic targeting of melanoma is unknown. Our objectives are (1) to study the relationship between EYA1 expression levels and melanoma patients' clinical pathologic parameters including survival; (2) to investigate its impact on cultured melanoma cells in vitro; and (3) to evaluate EYA1 inhibitors' potential as a treatment of melanoma. Melanoma tissue microarrays were used to assess EYA1 protein expression in 326 melanoma tissues, and to correlate the expression with patients' clinical pathological parameters...
December 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/29250649/inflammatory-juvenile-compound-conjunctival-nevi-a-clinicopathological-study-and-literature-review
#16
Claudia Florida Costea, Mihaela Dana Turliuc, Gabriela Dimitriu, Camelia Margareta Bogdănici, Anca MoŢoc, Mădălina Adriana Chihaia, Cristina Dancă, Andrei Cucu, Alexandru Cărăuleanu, Nicoleta Dumitrescu, Lucia Indrei, Şerban Turliuc
AIM: The conjunctival nevus affecting children and adolescents is a rare condition and the literature showed only few reports on this issue. The aim of this article is to determine the histopathological features for the correct diagnosis of an inflammatory juvenile compound nevus of the conjunctiva (IJCNC) in order to make the difference between this tumor and other lesions, like conjunctival melanoma or lymphoma, very similar from a gross point of view. This article is a clinical pathological study of two cases of IJCNC with particular histopathological characteristics, who were admitted at the 2nd Ophthalmology Clinic, "Prof...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/29249120/the-variegated-histopathological-features-of-atypical-lentiginous-melanocytic-nevi-almns-a-single-institution-experience
#17
Alessia Barisani, Salvatore D Infusino, Cosimo Misciali, Beatrice Passarini, Nunzio C Salfi, Elisa Varotti, Annalisa Patrizi
BACKGROUND: Atypical lentiginous melanocytic nevi (ALMNs) are atypical pigmented lesions with histopathological features similar to those of dysplastic nevi, with a lentiginous pattern. Variable histopathological features of ALMNs were observed in our practice. METHODS: We described the histopathological features of ALMNs diagnosed in the period 2009- 2015. Our cases were divided into 2 groups: Group 1: ALMNs showing the same histopathological features as previously described in the literature; Group 2: ALMNs with different features...
December 15, 2017: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/29231248/slurp-1-is-mutated-in-mal-de-meleda-a-potential-molecular-signature-for-melanoma-and-a-putative-squamous-lineage-tumor-suppressor-gene
#18
Christina Bergqvist, Humam Kadara, Lamiaa Hamie, Georges Nemer, Remi Safi, Mirna Karouni, Nadine Marrouche, Ossama Abbas, Divina J Hasbani, Abdul G Kibbi, Dany Nassar, Yutaka Shimomura, Mazen Kurban
BACKGROUND: Mal de Meleda (MDM) is a rare inherited autosomal recessive genodermatosis characterized by palmoplantar keratoderma (PPK) with transgrediens and caused by mutations in the SLURP1 gene. Uncommonly, cutaneous tumors have been found at PPK sites in MDM patients. OBJECTIVE: To study a Middle Eastern family with MDM with both PPK and skin tumors. METHODS: We studied a Middle Eastern (Palestinian) family with clinical features of MDM and cutaneous tumors...
December 12, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/29228734/cutaneous-melanoma-primary-site-is-linked-to-nevus-density
#19
Alejandro Martin-Gorgojo, Marta Llinares, Amaya Virós, Celia Requena, Zaida Garcia-Casado, Víctor Traves, Rajiv Kumar, Eduardo Nagore
There are at least two pathways driving cutaneous melanoma; one is linked to an inherent melanoma susceptibility to nevi development and the second to environmental cumulative ultraviolet light exposure. In this study, we examined the relation between nevus density, accrued sun damage and the site of primary melanoma excision. In a series of 888 consecutive cutaneous melanoma patients, melanomas appearing in skin areas with a high relative nevus density were most prominent in men, with an elevated nevus count, at sites without solar elastosis, but with an epidemiological history of previous sunburn...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29227334/quantitative-assessment-of-neuropilin-2-as-a-simple-and-sensitive-diagnostic-assay-for-spitzoid-melanocytic-lesions
#20
Anna Eisenstein, Izabela P Panova, Hye J Chung, Lynne J Goldberg, Qing Zhang, Rossitza Lazova, Jag Bhawan, Klaus J Busam, James T Symanowski, Rhoda M Alani, Byungwoo Ryu
There is a significant need for the development of diagnostic tools that can precisely distinguish Spitz nevi and spitzoid melanomas. Here, we report the development of a PCR-based quantitative diagnostic assay for spitzoid melanocytic lesions utilizing the expression ratio of neuropilin-2 and melan-A genes in primary tumor specimens. We find that the expression ratio of neuropilin-2/melan-A is significantly increased in spitzoid melanomas compared with Spitz nevi. The diagnostic potential of this quantitative assay was validated in two independent sets of patient samples as demonstrated in a receiver operating characteristic curve analysis showing an area under the curve value of 91...
December 8, 2017: Melanoma Research
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