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Histopathology

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https://www.readbyqxmd.com/read/28640961/incidence-clinicopathologic-features-and-fusion-transcript-landscape-of-translocation-renal-cell-carcinomas
#1
LETTER
Marion Classe, Valérie Grégoire, Gabriel G Malouf, Xavier Leroy
Sir: We thank Wang et al for their interest and pertinent comments about our article "Incidence, clinicopathologic features, and fusion transcript landscape of translocation renal cell carcinomas". We totally agree that the TFE3 break-apart FISH assay is sometimes difficult to interpret and may give rise to false-negatives. The authors question the FISH features observed in the newly described GRIPAP1-TFE3 fusion transcript. This article is protected by copyright. All rights reserved.
June 22, 2017: Histopathology
https://www.readbyqxmd.com/read/28640941/phox2b-reliably-distinguishes-neuroblastoma-among-small-round-blue-cell-tumors
#2
Yin P Hung, John P Lee, Andrew M Bellizzi, Jason L Hornick
AIMS: Neuroblastoma shows considerable histologic overlap with other small round blue cell tumors. PHOX2B, a transcription factor essential for autonomic nervous system development, has been reported as an immunohistochemical marker for neuroblastoma. The purpose of this study was to validate the specificity and diagnostic utility of PHOX2B for peripheral neuroblastic tumors. METHODS AND RESULTS: We evaluated 240 cases (133 in whole-tissue sections; 107 in tissue microarrays), including 76 peripheral neuroblastic tumors [median age 2 years; including 4 adults] and 164 other tumors: 44 Wilms tumors; 20 Ewing sarcomas; 10 each CIC-rearranged round cell sarcomas, poorly differentiated synovial sarcomas, lymphoblastic lymphomas, alveolar rhabdomyosarcomas, embryonal rhabdomyosarcomas, mesenchymal chondrosarcomas, Merkel cell carcinomas, olfactory neuroblastomas, and melanomas; 5 each NUT midline carcinomas and desmoplastic small round cell tumors...
June 22, 2017: Histopathology
https://www.readbyqxmd.com/read/28628241/aberrant-expression-of-cd10-and-bcl6-in-mantle-cell-lymphoma
#3
Marco Pizzi, Claudio Agostinelli, Simona Righi, Anna Gazzola, Claudia Mannu, Francesca Galuppini, Matteo Fassan, Andrea Visentin, Francesco Piazza, Gianpietro C Semenzato, Massimo Rugge, Elena Sabattini
AIMS: Mantle cell lymphoma (MCL) is characterized by distinctive histologic and molecular features. Aberrant expression of BCL6 and CD10 has occasionally been reported, but the biological features of such cases are largely unknown. This study aimed to define the epidemiologic, histologic and cytogenetic characteristics of BCL6 and CD10-positive MCLs, also investigating possible biological features. METHODS AND RESULTS: 165 cases of cyclin D1 and t(11;14)(q13;q34) positive MCLs were studied for CD10 and BCL6 immunohistochemical expression which was documented in 26/165 (15...
June 19, 2017: Histopathology
https://www.readbyqxmd.com/read/28621837/pediatric-follicular-thyroid-carcinoma-indolent-cancer-with-low-prevalence-of-ras-mutations-and-absence-of-pax8-pparg-fusion-in-a-japanese-population
#4
Huy Gia Vuong, Tetsuo Kondo, Naoki Oishi, Tadao Nakazawa, Kunio Mochizuki, Akira Miyauchi, Mitsuyoshi Hirokawa, Ryohei Katoh
BACKGROUND: Pediatric follicular thyroid carcinomas are uncommon and their clinicopathological features and molecular profiles are still unknown. In this present study, we aimed to investigate the clinicopathological aspects of a large series of follicular thyroid carcinomas (FTCs) in pediatric patients and to analyse the point mutations in codons 12, 13 and 61 of NRAS, HRAS and KRAS genes and the rearrangements of PAX8-PPARG. METHODS: A total of 41 pediatric FTCs less than 21 years of age were enrolled in the present study...
June 16, 2017: Histopathology
https://www.readbyqxmd.com/read/28618047/focal-b-catenin-mutation-identified-on-formalin-fixed-and-paraffin-embedded-inflammatory-hepatocellular-adenomas
#5
Joan Saldarriaga, Bettina Bisig, Gabrielle Couchy, Claire Castain, Jessica Zucman-Rossi, Charles Balabaud, Christine Sempoux, Paulette Bioulac-Sage
The identification of hepatocellular adenoma (HCA) with mutation in exon 3 of the CTNNB1 gene encoding for b-catenin is clinically relevant due to higher risk of malignant transformation. Inflammatory HCA (IHCA) can exhibit b-catenin activation (b-IHCA). We report 2 cases with multiple IHCA in which focal b-catenin activation has been found in one of the IHCA. In both cases, the diagnosis of IHCA was confirmed on the resected nodules by routine stains, immunohistochemical detection of C-reactive protein (CRP), and molecular biology on frozen material...
June 15, 2017: Histopathology
https://www.readbyqxmd.com/read/28617974/high-expression-of-heat-shock-proteins-and-heat-shock-factor-1-distinguishes-an-aggressive-subset-of-clear-cell-renal-cell-carcinoma
#6
Pao-Shu Wu, Yen-Hwa Chang, Chin-Chen Pan
AIMS: Heat shock proteins (HSPs) are a group of molecules induced by a variety of environmental and pathophysiologic stresses, including cancer. HSPs are implicated in the regulation of apoptosis and immunity in neoplasm. Transcription factor heat shock factor1 (HSF1) acts as the master regulator to control HSP expression, and therefore is involved in tumorigenesis. The purpose of this study was to evaluate the expression and clinicopathologic relevance of HSPs and HSF1 in clear cell renal cell carcinoma (ccRCC)...
June 15, 2017: Histopathology
https://www.readbyqxmd.com/read/28609585/immunoexpression-of-p16-in-uterine-leiomyomas-with-infarct-type-necrosis-an-analysis-of-35-cases
#7
Philip P C Ip, Diana Lim, Annie N Y Cheung, Esther Oliva
AIMS: Uterine leiomyosarcomas frequently show p16 immunoexpression. However, p16 may also be expressed in some benign leiomyoma variants such as leiomyomas with bizarre nuclei and cellular leiomyomas, limiting its utility as a biomarker to distinguish between benign and malignant neoplasms. We investigated p16 expression in leiomyomas with infarct-type necrosis, tumours which may sometimes be misinterpreted as smooth muscle tumors of uncertain malignant potential or even leiomyosarcoma on conventional light microscopy...
June 13, 2017: Histopathology
https://www.readbyqxmd.com/read/28594149/myb-mybl1-mybl2-and-nfib-gene-alterations-and-myc-overexpression-in-salivary-gland-adenoid-cystic-carcinoma
#8
Kana Fujii, Takayuki Murase, Shintaro Beppu, Kosuke Saida, Hisashi Takino, Ayako Masaki, Kei Ijichi, Kimihide Kusafuka, Yoshiyuki Iida, Tetsuro Onitsuka, Yasushi Yatabe, Nobuhiro Hanai, Yasuhisa Hasegawa, Hiroshi Inagaki
AIMS: Adenoid cystic carcinoma (AdCC) is one of the most common salivary gland malignancies and the long-term prognosis is poor. In this study, we examined alterations of AdCC-associated genes, MYB, MYBL1, MYBL2, and NFIB, and their target molecules including MYC. The results were correlated to clinicopathological profile of the patients. METHODS AND RESULTS: Using paraffin tumor sections from 33 cases of salivary gland AdCC, we performed a detailed fluorescence in situ hybridization (FISH) analysis for gene splits and fusions of MYB, MYBL1, MYBL2, and NFIB...
June 8, 2017: Histopathology
https://www.readbyqxmd.com/read/28594133/diagnostic-value-of-stmn1-lmo2-hgal-aid-expression-and-1p36-chromosomal-abnormalities-in-primary-cutaneous-b-cell-lymphomas
#9
Evelyne Verdanet, Olivier Dereure, Céline René, Ariane Tempier, Assia Benammar-Hafidi, Mathieu Gallo, Eric Frouin, Luc Durand, Isabelle Gazagne, Valérie Costes-Martineau, Valère Cacheux, Vanessa Szablewski
INTRODUCTION: distinction between primary cutaneous follicular lymphoma (PCFL) and primary cutaneous marginal zone lymphoma (PCMZL) is challenging as clear-cut immunophenotypic and cytogenetic criteria to segregate both entities are lacking. MATERIALS AND METHODS: to better characterize PCFL and PCMZL and to define criteria helpful for the differential diagnosis, we compared expression of immunohistochemical markers (LMO2, HGAL, STMN1, AID, MNDA) and the presence of cytogenetic abnormalities previously described in nodal follicular lymphoma (BCL2 and BCL6 breaks, 1p36 chromosomal region deletion (del 1p36)) in a series of 48 cutaneous follicular and marginal zone lymphomas (CFL and CMZL)...
June 8, 2017: Histopathology
https://www.readbyqxmd.com/read/28590015/mucinous-adenocarcinoma-of-prostate-and-prostatic-adenocarcinoma-with-mucinous-components-a-clinicopathological-analysis-of-143-cases
#10
Hemamali Samaratunga, Brett Delahunt, John R Srigley, John Yaxley, Shulammite Johannsen, Geoffrey Coughlin, Troy Gianduzzo, Boon Kua, Imogen Patterson, John N Nacey, Lars Egevad
The clinical significance of mucinous prostatic adenocarcinoma remains uncertain. From 6440 cases of prostatic adenocarcinoma treated by radical prostatectomy and reported by Aquesta Uropathology from 2009 to 2014, mucinous components of 5-100% were found in 143 (2.2%). The mean age was 61.4 years, mean preoperative serum was PSA 7.8 ng/mL and clinical stage category was cT1 in 81% and cT2 in 19% of cases. Cases were graded using the 2014 International Society of Urological Pathology recommendation of grading the underlying architecture and Gleason scores were 3+4 in 13...
June 7, 2017: Histopathology
https://www.readbyqxmd.com/read/28581204/nephrogenic-adenoma-does-not-express-nkx3-1
#11
LETTER
Gloria Zhang, Andrew McDaniel, Rohit Mehra, Jesse K McKenney
Nephrogenic adenoma of the urinary tract is a benign lesion that is frequently associated with urothelial injury or inflammation. It is reported in virtually all urothelial lined sites, but is most commonly found in the urinary bladder (75-80%) and the urethra (12%), including the prostatic urethra.(1,2) When identified in this latter site, it may be confused with prostatic adenocarcinoma because of its pseudo-infiltrative small gland-like pattern of growth. This article is protected by copyright. All rights reserved...
June 5, 2017: Histopathology
https://www.readbyqxmd.com/read/28581124/zbtb16-is-a-sensitive-and-specific-marker-in-detection-of-metastatic-and-extragonadal-yolk-sac-tumor
#12
Guang-Qian Xiao, David S Priemer, Christina Wei, Manju Aron, Qi Yang, Muhammad T Idrees
AIMS: Accurate histologic diagnosis and classification of germ cell tumors (GCTs) is key to informing successful therapeutic and surveillance strategy. Modern therapeutic approach for yolk sac tumor (YST) is highly curative. Because YST takes on a large morphologic spectrum, it can be confused for other GCT subtypes as well as somatic carcinomas, particularly when YST presents in an extragonadal or a metastatic setting. Currently available immunohistochemical markers are limited by suboptimal sensitivity and specificity...
June 5, 2017: Histopathology
https://www.readbyqxmd.com/read/28570009/mucinous-cystic-neoplasms-of-the-liver-and-pancreas-relationship-between-kras-driver-mutations-and-disease-progression
#13
Kohei Fujikura, Masayuki Akita, Shiho Abe-Suzuki, Tomoo Itoh, Yoh Zen
AIMS: To compare the oncogenic mutation status among mucinous cystic neoplasms (MCNs) of different histological grades and between liver and pancreatic MCNs. METHODS AND RESULTS: KRAS, GNAS, RNF43 and PIK3CA were sequenced in 25 surgical cases of hepatopancreatic MCNs. Molecular features were correlated with clinicopathological and immunohistochemical findings. KRAS mutations were identified in 5 cases (20%), while GNAS, RNF43 and PIK3CA were the wild-type in all cases...
June 1, 2017: Histopathology
https://www.readbyqxmd.com/read/28570008/a-comparison-of-p53-and-wt1-immunohistochemical-expression-patterns-in-tubo-ovarian-high-grade-serous-carcinoma-before-and-after-neoadjuvant-chemotherapy
#14
Laura Casey, Martin Köbel, Raji Ganesan, Simone Tam, Rajeev Prasad, Steffen Böhm, Michelle Lockley, Arjun J Jeyarajah, Eleanor Brockbank, Asma Faruqi, C Blake Gilks, Naveena Singh
AIMS: Treatment of patients with tubo-ovarian high-grade serous carcinoma (HGSC) is increasingly based on diagnosis on small biopsy samples and the first surgical specimen is often post-chemotherapy. p53 and WT1 are important diagnostic markers for HGSC. The effect of neo-adjuvant chemotherapy on p53 and WT1 expression has not been widely studied. We aimed to compare p53 and WT1 expression in paired pre- and post-chemotherapy samples of HGSC. METHODS AND RESULTS: Immunohistochemistry (IHC) was carried out for p53 and WT1 on paired omental HGSC samples pre- and post-chemotherapy...
June 1, 2017: Histopathology
https://www.readbyqxmd.com/read/28570007/atypical-intraductal-proliferation-and-intraductal-carcinoma-of-the-prostate-on-core-needle-biopsy-a-comparative-clinicopathological-and-molecular-study-with-a-proposal-to-expand-morphological-spectrum-of-intraductal-carcinoma
#15
Rajal B Shah, Jiyoon Yoon, Gang Liu, Wei Tian
AIMS: Atypical intraductal proliferation (AIP) of the prostate is histologically worse than high-grade prostate intraepithelial neoplasia, but lacks the diagnostic criteria of intraductal carcinoma (IDC-P). The study aims to compare clinicopathological and molecular characteristics (ERG overexpression and PTEN loss) of AIP and IDC-P in core needle biopsies. METHODS AND RESULTS: Total 106 (84 (5.6%) of 1480 consecutive and 22 retrospectively collected) cases met the criteria: AIP only (2...
June 1, 2017: Histopathology
https://www.readbyqxmd.com/read/28570006/primary-conjunctival-myxoma-case-series-and-review-of-the-literature
#16
Dolores Ríos Y Valles-Valles, Ivette Hernández-Ayuso, Héctor A Rodríguez-Martínez, Armando Medina-Cruz, Guillermo Salcedo-Casillas, Abelardo A Rodríguez-Reyes
AIMS: Myxomas are benign soft tissue tumors resembling primitive mesenchyme. They rarely involve ocular structures and have been recognized in conjunctiva, eyelids, cornea and orbit. The purpose of this study is to describe the clinicopathological features of 7 patients with primary conjunctival myxoma seen at Dr. Luis Sánchez Bulnes Hospital an ophthalmologic referral center in Mexico City. MATERIALS AND METHODS: We reviewed the clinical, histochemical and immunohistochemical studies of patients with documented myxoma of the conjunctiva diagnosed in our hospital...
June 1, 2017: Histopathology
https://www.readbyqxmd.com/read/28561935/clinicopathologic-characteristics-of-kit-and-protein-kinase-c-%C3%AE-expression-in-adenoid-cystic-carcinoma-comparison-with-chromophobe-renal-cell-carcinoma-and-gastrointestinal-stromal-tumor
#17
Cheol Keun Park, Won Kyu Kim, Hoguen Kim
AIMS: KIT overexpression is frequently observed in adenoid cystic carcinomas (AdCCs), chromophobe renal cell carcinomas (ChRCCs), and gastrointestinal stromal tumor (GISTs). Persistent KIT activation has been reported to be mediated by protein kinase C (PKC)-δ in a subset of colon cancers with wild-type KIT overexpression and by PKC-θ in GISTs with mutant KIT overexpression. To elucidate the clinical implications of PKC-δ and PKC-θ expression in KIT-expressing tumors, we investigated the expression of KIT, PKC-δ, and PKC-θ in AdCCs and ChRCCs in comparison to GISTs...
May 31, 2017: Histopathology
https://www.readbyqxmd.com/read/28556957/increased-frequency-of-bronchiolar-histotypes-in-lung-carcinomas-associated-with-idiopathic-pulmonary-fibrosis
#18
Anna Caliò, Veronica Lever, Andrea Rossi, Eliana Gilioli, Matteo Brunelli, Alessandra Dubini, Sara Tomassetti, Sara Piciucchi, Alessia Nottegar, Giulio Rossi, Marianne Kambouchner, Alessandra Cancellieri, Mattia Barbareschi, Giuseppe Pelosi, Claudio Doglioni, Alberto Cavazza, Rodolfo Carella, Paolo Graziano, Bruno Murer, Venerino Poletti, Marco Chilosi
AIMS: The association between lung cancer and idiopathic pulmonary fibrosis (IPF) is well-known, however the significance of this association is poorly understood. Bronchiolar honeycomb cysts have been proposed as possible precursors for development of carcinoma, but limited evidence of this hypothesis is available. METHODS AND RESULTS: Thirty-three lung carcinomas arising in patients with IPF have been analyzed using a panel of immunohistochemical markers. The antibodies included pneumocyte markers (TTF1, Napsin-A, SPA1), the goblet cell marker MUC5AC, markers of basal/squamous cell differentiation (CK5/6, ΔN-p63) and markers related to enteric differentiation (CDX2, MUC2, CK20, villin)...
May 30, 2017: Histopathology
https://www.readbyqxmd.com/read/28556238/xist-rna-ish-as-a-tool-for-resolving-specimen-contamination-events
#19
LETTER
Rory Crotty, Kshitij Arora, Shilpa Prasad, David Ting, Miguel Rivera, Vikram Deshpande
The large number of manual steps involved in processing tissue creates many opportunities for specimen cross-contamination and carry-over defects, which may have serious medicolegal ramifications.(1) In one study extraneous tissue was identified in 0.6% of slides, causing severe diagnostic difficulties in 0.4% of cases.(1) As these events are not fully preventable, a quick, reliable, easily accessible method to resolve suspected contamination events is crucial. This article is protected by copyright. All rights reserved...
May 29, 2017: Histopathology
https://www.readbyqxmd.com/read/28556362/a-case-of-primary-secretory-carcinoma-of-the-thyroid-gland-with-high-grade-features
#20
LETTER
Elizabeth Y Wu, Jasmin Lebastchi, Ellen Marqusee, Jochen H Lorch, Jeffrey F Krane, Justine A Barletta
We report a case of primary secretory carcinoma of the thyroid with high-grade features to highlight cytologic and histologic clues to the diagnosis. The diagnosis of primary secretory carcinoma of the thyroid is challenging both due to the fact that it has only recently been described and because of its morphologic overlap with papillary thyroid carcinoma (PTC); however, differentiating secretory carcinoma from PTC is crucial both for prognostication and treatment purposes. This article is protected by copyright...
May 28, 2017: Histopathology
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