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Human Pathology

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https://www.readbyqxmd.com/read/28720435/incipient-serous-cystic-neoplasia-of-the-pancreas-is-a-very-rare-phenomenon-a-systematic-prospective-observation-in-pancreatectomy-specimens-reply
#1
LETTER
https://www.readbyqxmd.com/read/28720434/incipient-serous-cystic-neoplasia-of-the-pancreas-is-a-very-rare-phenomenon-a-systematic-prospective-observation-in-pancreatectomy-specimens
#2
LETTER
Łukasz Liszka
No abstract text is available yet for this article.
July 15, 2017: Human Pathology
https://www.readbyqxmd.com/read/28716439/renal-cell-carcinoma-unclassified-with-medullary-phenotype-poorly-differentiated-adenocarcinomas-overlapping-with-renal-medullary-carcinoma
#3
Deepika Sirohi, Steven C Smith, Chisato Ohe, Piergiuseppe Colombo, Mukul Divatia, Ema Dragoescu, Priya Rao, Michelle S Hirsch, Ying-Bei Chen, Rohit Mehra, Mahul B Amin
Renal medullary carcinoma (RMC) is a highly aggressive renal cell carcinoma, arising in the collecting system, and requiring careful correlation with status of sickle cell trait. A panel of international experts has recently proposed provisional diagnostic terminology, renal cell carcinoma, unclassified, with medullary phenotype (RCCU-MP), based on encountering an extraordinarily rare tumor with RMC morphology and immunophenotype in an individual proven not to have a hemoglobinopathy. Herein, we extend this observation to a cohort of five such tumors, morphologically similar to RMC, lacking SMARCB1 expression by immunohistochemistry, but each without evidence of a hemoglobinopathy...
July 14, 2017: Human Pathology
https://www.readbyqxmd.com/read/28716438/the-impact-of-knowledge-transfer-on-the-detection-of-venous-invasion-in-colorectal-cancer
#4
Richard Kirsch, Naziheh Assarzadegan, David E Messenger, Ari Juda, Robert H Riddell, Aaron Pollett, Catherine J Streutker, Dimitrios X Divaris, Ken J Newell, Russell G Price, Sharyn Smith, Sahar Al-Haddad, Jeremy R Parfitt, David K Driman
Venous invasion (VI) is an independent predictor of hematogenous metastasis and mortality in colorectal cancer (CRC), yet remains widely under-reported. Its detection may require recognition of subtle morphologic clues which at times are only unmasked with an elastin stain. This study evaluates the impact of a knowledge transfer initiative (KTI) on VI detection in a "real world" pathology practice setting. Following participation in an interobserver variability study of VI detection (Kirsch et al 2013), twelve participants received educational materials highlighting key issues in VI detection...
July 14, 2017: Human Pathology
https://www.readbyqxmd.com/read/28712777/reproducibility-for-histologic-parameters-in-peritoneal-mesothelioma
#5
Douglas J Hartman, Alain Borczuk, Sanja Dacic, Alyssa Krasinskas
Histologic subtype is recognized as a prognostic factor in malignant pleural mesothelioma. Specifically, epithelial morphology is associated with a better prognosis than other subtypes and the same association is observed in peritoneal malignant mesothelioma. Recently, prognostic differences based on morphologic subtypes of epithelial peritoneal malignant mesothelioma were reported. Herein, we report the interobserver variability across four pathologists at three institutions. The authors independently reviewed 67 cases of malignant peritoneal epithelioid mesotheliomas and subclassified them according to their epithelial subtype: papillary, tubulopapillary, trabecular, micropapillary, solid and/or pleomorphic...
July 13, 2017: Human Pathology
https://www.readbyqxmd.com/read/28712776/clonal-evolution-in-paired-endometrial-intraepithelial-neoplasia-atypical-hyperplasia-and-endometrioid-adenocarcinoma
#6
Mariano Russo, James Broach, Kathryn Sheldon, Kenneth R Houser, Dajiang J Liu, Joshua Kesterson, Rebecca Phaeton, Carrie Hossler, Nadine Hempel, Maria Baker, Jordan M Newell, Richard Zaino, Joshua I Warrick
Endometrial intraepithelial neoplasia (EIN) and atypical endometrial hyperplasia (AH) are histomorphologically-defined precursors to endometrioid adenocarcinoma, which are unified as EIN/AH by the World Health Organization. EIN/AH harbors a constellation of molecular alterations similar those found in endometrioid adenocarcinoma. However, the process of clonal evolution from EIN/AH to carcinoma is poorly characterized. To investigate, we performed next generation sequencing, copy number alteration (CNA) analysis, and immunohistochemistry for mismatch repair protein expression on EIN/AH and endometrioid adenocarcinoma samples from 6 hysterectomy cases with spatially distinct EIN/AH and carcinoma...
July 13, 2017: Human Pathology
https://www.readbyqxmd.com/read/28711650/role-of-satb2-in-distinguishing-the-site-of-origin-in-glandular-lesions-of-the-bladder-urinary-tract
#7
Giovanna Angela Giannico, Allen M Gown, Jonathan I Epstein, Frank Revetta, Justin A Bishop
The differential diagnosis of glandular lesions of the bladder/urinary tract can be challenging due to significant morphologic and immunohistochemical overlap between primary lesions and metastasis/direct extension from adjacent organs. Special AT-rich sequence-binding protein 2 (SATB2), encoded on chromosome 2q32-33, is a recently described DNA-binding protein involved in osteoblast lineage commitment and expressed in colorectal and appendiceal neoplasms. In this study, we hypothesized that immunohistochemistry for SATB2 may be of value in distinguishing primary adenocarcinoma of the bladder/urinary tract and urothelial carcinoma with glandular differentiation from gastrointestinal and endocervical primaries...
July 12, 2017: Human Pathology
https://www.readbyqxmd.com/read/28711649/intramucosal-colorectal-carcinoma-with-invasion-of-the-lamina-propria-a-study-by-the-japanese-society-for-cancer-of-the-colon-and-rectum
#8
Motohiro Kojima, Hideyuki Shimazaki, Keiichi Iwaya, Takahiro Nakamura, Hiroshi Kawachi, Kazuhito Ichikawa, Shigeki Sekine, Shingo Ishiguro, Tadakazu Shimoda, Ryoji Kushima, Takashi Yao, Takahiro Fujimori, Kazuo Hase, Toshiaki Watanabe, Kenichi Sugihara, Gregory Y Lauwers, Atsushi Ochiai
Cancer invasion of the lamina propria is an important pathological finding. However, the clinicopathologic features and diagnostic accuracy of intramucosal carcinoma assessment in colorectal carcinoma (CRC) are unknown. In this study, intramucosal CRCs were reviewed in institutions affiliated with the Japanese Society for Cancer of the Colon and Rectum, and 32 cases with invasion of the lamina propria were identified. Next, a consensus meeting was held to select cases with a high consensus about the presence of invasion, which were reviewed by one Western pathologist for confirmation...
July 12, 2017: Human Pathology
https://www.readbyqxmd.com/read/28711648/alteration-of-pdgfr%C3%AE-akt-mtor-pathway-signaling-in-fibrosarcomatous-transformation-of-dermatofibrosarcoma-protuberans
#9
Yuka Hiraki-Hotokebuchi, Yuichi Yamada, Kenichi Kohashi, Hidetaka Yamamoto, Makoto Endo, Nokitaka Setsu, Kuma Yuki, Takamichi Ito, Yukihide Iwamoto, Masutaka Furue, Yoshinao Oda
Dermatofibrosarcoma protuberans (DFSP) is a cutaneous mesenchymal tumor of intermediate malignancy and fibroblastic/myofibroblastic differentiation. Fibrosarcomatous (FS) component is a high-grade component of DFSP. The detailed oncogenic difference between DFSP and FS components is not clear. We thus investigated the Akt-mTOR pathway in both components. We used 65 tumor samples obtained from 65 patients. The phosphorylation of Akt-mTOR pathway proteins (Akt, mTOR, 4EBP1, and S6RP) and PDGFRα/β was assessed by immunohistochemical staining, the results of which were confirmed by western blotting...
July 12, 2017: Human Pathology
https://www.readbyqxmd.com/read/28709830/pathologic-findings-in-breast-fallopian-tube-and-ovary-specimens-in-non-brca-hereditary-breast-and-or-ovarian-cancer-syndromes-a-study-of-18-patients-with-deleterious-germline-mutations-in-rad51c-bard1-brip1-palb2-mutyh-or-chek2
#10
J Kenneth Schoolmeester, Ann M Moyer, McKinsey L Goodenberger, Gary L Keeney, Jodi M Carter, Jamie N Bakkum-Gamez
Germline BRCA mutations account for a significant proportion of genetic/familial risk of breast and ovarian cancer (GBOC) susceptibility, but a broader spectrum of GBOC susceptibility genes has emerged in recent years. Genotype to phenotype correlations are known for some established forms of GBOC, however whether such correlations exist for less common GBOC variants is unclear. We reviewed our institution's experience with non-BRCA GBOC, looking specifically for trends in pathologic and clinical features. Eighteen women with deleterious germline mutations in RAD51C (5 patients), BARD1 (1 patient), BRIP1 (2 patients), PALB2 (3 patients), MUTYH (2 patients) or CHEK2 (5 patients) were identified between January 2011 and December 2016...
July 11, 2017: Human Pathology
https://www.readbyqxmd.com/read/28705710/using-p16-immunohistochemistry-to-classify-morphologic-cervical-intraepithelial-neoplasia-2-correlation-of-ambiguous-staining-patterns-with-hpv-subtypes-and-clinical-outcome
#11
Yuxin Liu, Mahfood Alqatari, Kieran Sultan, Fei Ye, Dana Gao, Keith Sigel, David Zhang, Tamara Kalir
P16(INK4a) immunohistochemistry (IHC) is widely used to facilitate the diagnosis of human papillomavirus (HPV)-associated cervical precancerous lesions. While most p16 results are distinctly positive or negative, certain ones are ambiguous: they meet some but not all requirements for the "block-positive" pattern. It is unclear whether ambiguous p16 immunoreactivity indicates oncogenic HPV infection or risk of progression. Herein, we compared HPV genotypes and subsequent High-grade Squamous Intraepithelial Lesion (HSIL) outcomes among 220 cervical biopsies with a differential diagnosis of Cervical Intraepithelial Neoplasia 2 (CIN 2) based on hematoxylin and eosin morphology and varying degrees of p16 immunoreactivity...
July 10, 2017: Human Pathology
https://www.readbyqxmd.com/read/28705709/a-novel-sclerosing-atypical-lipomatous-tumor-well-differentiated-liposarcoma-in-a-7-year-old-girl-report-of-a-case-with-molecular-confirmation
#12
Ran Peng, Huijiao Chen, Xuantao Yang, Xianliang Zhang, Zhang Zhang, Xin He, Hongying Zhang
Atypical lipomatous tumor/well-differentiated liposarcoma/dedifferentiated liposarcoma (ALT/WDL/DDL) is a common type of liposarcoma in late adulthood. However, pediatric ALT/WDL/DDL is extremely rare, and only 3 cases have been described in children younger than 10years of age. Notably, none of these cases harbored MDM2 gene amplification. Here, we reported a sclerosing ALT/WDL in a 7-year-old Chinese girl. Histologically, in most areas, the neoplastic cells were embedded within the collagenous background and typical lipogenic areas were inconspicuous throughout the sclerotic areas...
July 10, 2017: Human Pathology
https://www.readbyqxmd.com/read/28705708/perineural-invasion-by-prostate-cancer-on-mr-us-fusion-targeted-biopsy-is-associated-with-extraprostatic-extension-and-early-biochemical-recurrence-after-radical-prostatectomy
#13
Matthew Truong, Soroush Rais-Bahrami, Jeffrey W Nix, Edward M Messing, Hiroshi Miyamoto, Jennifer B Gordetsky
In recent years, multiparametric magnetic resonance imaging (MRI) and MR/ultrasound (US) fusion targeted biopsy (TB) have become more widely adopted to aid in prostate cancer (PCa) detection. Previously, TB has been found to increase the yield of clinically significant PCa and is more likely to sample the index tumor compared to traditional 12-core extended sextant biopsies. Currently the prognostic significance of perineural invasion (PNI) when identified on TB (PNI-TB) is unknown. We identified 95 men at two tertiary referral centers who underwent TB followed by radical prostatectomy between January 2014 and January 2017...
July 10, 2017: Human Pathology
https://www.readbyqxmd.com/read/28705707/gata3-as-a-valuable-marker-to-distinguish-clear-cell-papillary-renal-cell-carcinomas-from-morphologic-mimics
#14
Jose G Mantilla, Tatjana Antic, Maria Tretiakova
Clear cell papillary renal cell carcinoma (CCPRCC) is a low-grade, indolent neoplasm, with no reported cases of death from disease or metastasis. These lesions can show clinical, morphologic and immunophenotypic overlap with several aggressive forms of renal cell carcinoma (RCC), including clear cell (CCRCC), translocation RCC and papillary RCC (PRCC) with cytoplasmic clearing. Given the difference in behavior, it is important to reliably separate these entities. We retrospectively reviewed 47 tumors from 45 patients with morphologic features of CCPRCC...
July 10, 2017: Human Pathology
https://www.readbyqxmd.com/read/28705706/inflammatory-myofibroblastic-tumors-of-the-lung-carrying-a-chimeric-a2m-alk-gene-report-of-two-infantile-cases-and-review-of-the-differential-diagnosis-of-infantile-pulmonary-lesions
#15
Mio Tanaka, Kenichi Kohashi, Kei Kushitani, Misa Yoshida, Sho Kurihara, Masumi Kawashima, Yuka Ueda, Ryota Souzaki, Yoshiaki Kinoshita, Yoshinao Oda, Yukio Takeshima, Eiso Hiyama, Tomoaki Taguchi, Yukichi Tanaka
We report two infantile cases of pulmonary tumor carrying a chimeric A2M-ALK gene. A2M-ALK is a newly identified anaplastic lymphoma kinase (ALK)-related chimeric gene from a tumor diagnosed as fetal lung interstitial tumor (FLIT). FLIT is a recently recognized infantile pulmonary lesion defined as a mass-like lesion that morphologically resembles the fetal lung. Grossly, FLIT characteristically appears as a well-circumscribed spongy mass, whereas the tumors in these patients were solid and firm. Histologically, the tumors showed intrapulmonary lesions composed of densely proliferating polygonal or spindle-shaped mesenchymal cells with diffuse and dense infiltrations of inflammatory cells, forming microcystic or micropapillary structures lined by TTF1-positive pneumocytes, favoring IMT rather than FLIT...
July 10, 2017: Human Pathology
https://www.readbyqxmd.com/read/28694003/pd-l1-and-immune-escape-insights-from-melanoma-and-other-lineage-unrelated-malignancies
#16
Noah Frydenlund, Meera Mahalingam
One of the major breakthroughs in oncology in the past decade has been the research and development of immune checkpoint inhibitors. Since the discovery of the PD-1/PD-L1 axis as a key mediator in peripheral self-tolerance and the subsequent discovery of its role promoting immune escape in cancers, the PD-1/PD-L1 pathway has produced considerable excitement from both a scientific and therapeutic stand point. The past decade has seen an explosion in the number of clinical trials utilizing antI-PD-1/PD-L1 therapy...
July 7, 2017: Human Pathology
https://www.readbyqxmd.com/read/28688898/liver-biopsy-findings-in-patients-with-hematopoietic-cell-transplantation
#17
Farzan Eskandari, Daniel Rowan, Parameswaran Hari, Jonathan Kapke, Robert Schneidewend, Catherine Hagen, Kiyoko Oshima
Liver dysfunction is a frequent complication after hematopoietic-cell transplantation (HCT). Liver biopsy has an important role for confirming the diagnosis of graft versus host disease (GVHD) or other liver diseases. The histological features of GVHD are not specific, and GVHD and other coexisting diseases may be present in the same biopsy, which makes the histologic interpretation of the liver biopsy more complex and challenging. The aim of the study is to improve the present diagnostic criteria. 52 liver biopsies were studied...
July 5, 2017: Human Pathology
https://www.readbyqxmd.com/read/28669641/prognostic-significance-of-extensive-necrosis-in-renal-cell-carcinoma
#18
Jennifer Collins, Jonathan I Epstein
Few studies using the current classification of renal cell carcinoma (RCC) have looked at a large number of cases with near total necrosis. We identified 21 cases of resections of RCC with >90% necrosis from the archives of Johns Hopkins Hospital between 2000-2015. Patients' mean age was 59yrs. (43-77) with 16 (76%) males. 12 (57%) cases were papillary RCC, 4 (19%) clear cell papillary RCC, 4 (19%) clear cell RCC, 1 (5%) unclassified with sarcomatoid differentiation. International Society of Urological Pathology (ISUP) nucleolar grade was grade 1 (9 cases) or grade 2 (9 cases)...
June 29, 2017: Human Pathology
https://www.readbyqxmd.com/read/28666927/prognostic-significance-of-igg4-plasma-cell-infiltrates-following-neoadjuvant-chemoradiation-therapy-for-esophageal-adenocarcinoma
#19
Evgeny Yakirevich, Shaolei Lu, Danisha Allen, Shamlal Mangray, Jacqueline R Fanion, Kara A Lombardo, Howard Safran, Murray B Resnick
Lymphoplasmacytic infiltrates in esophageal adenocarcinoma (EAC) tissue following chemoradiotherapy (CRT) reflect alterations in the tumor immunoenvironment. The presence and role of plasma cells in this process are poorly understood. Our aim was to characterize the IgG4+ plasma cell population in EAC following CRT. Seventy-one esophagectomy specimens post CRT were compared to a surgery only group of 31 EACs. The distribution, density, and ratio of IgG4+ and IgG+ plasma cells were evaluated by immunohistochemistry and correlated with clinicopathologic features, treatment response, and survival...
June 27, 2017: Human Pathology
https://www.readbyqxmd.com/read/28666926/proliferation-index-of-different-gleason-pattern-4-histomorphologies-and-associated-pattern-3-adenocarcinoma-of-the-prostate
#20
Liying Fu, Michael Hwang, Adebowale J Adeniran, Peter A Humphrey
Gleason grade is one of the most powerful prognostic indicators for adenocarcinoma of the prostate. A higher proliferation index of prostatic adenocarcinoma has been demonstrated in numerous studies to be significantly associated with more aggressive behavior. To date, the proliferation index of the different Gleason pattern 4 histomorphologies, including cribriform, fused glands, and poorly-formed glands, has not been determined. The aim of this investigation was to quantitate and compare the proliferation index, as assessed by Ki67 labeling index, of different Gleason pattern 4 histomorphologies...
June 27, 2017: Human Pathology
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