{"title":"Ovarian microcystic stromal tumor: Review of a rare entity with recent updates","authors":"Yan Li , Shuang Niu","doi":"10.1016/j.hpr.2024.300744","DOIUrl":"https://doi.org/10.1016/j.hpr.2024.300744","url":null,"abstract":"<div><p>Microcystic stromal tumors (MCSTs) are rare ovarian stromal tumors. They harbor <em>CTNNB1</em> or <em>APC</em> mutations, resulting in β-catenin nuclear expression. Morphologically, they characteristically consist of tumor cells with small round nuclei, inconspicuous nucleoli, moderate amount of eosinophilic or vacuolated cytoplasm. Cells can form solid nests and sheets, small or sometimes large cystic structures. Background stroma is often myxoid with foci of fibrosis. In addition to the nuclear β-catenin stain, the tumor cells are characteristically negative for inhibin and calretinin, but positive for CD10, CyclinD1, WT1 and FOXL2. To date, all MCST cases treated with oophorectomy or more extensive surgery have followed benign clinical courses. However, two of the four cases treated with ovarian cystectomy/tumor resection recurred in the residual ovary and local extraovarian involvement several years after ovarian cystectomy, which indicates MCST has the potential to recur and spread locally. This article is aimed to review the literature about MCST to summarize its morphology, immunophenotype, molecular alteration as well as clinical behavior.</p></div>","PeriodicalId":100612,"journal":{"name":"Human Pathology Reports","volume":"36 ","pages":"Article 300744"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772736X24000161/pdfft?md5=ff2ea2fd3cad5b4baf2e09422215336d&pid=1-s2.0-S2772736X24000161-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141240828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Salivary gland Cytology, the new and the Old, a Pattern-Based approach","authors":"Shuo Niu, Yanjun Hou","doi":"10.1016/j.hpr.2024.300742","DOIUrl":"https://doi.org/10.1016/j.hpr.2024.300742","url":null,"abstract":"<div><p>Salivary gland neoplasms are rare and represent a diverse group of tumors. Fine-needle aspiration is a cost effective approach that has been widely applied in preoperative diagnosis of salivary gland lesions to guide clinical management. The wide diversity of entities, significant morphological overlap and limited cellularity make salivary gland cytology challenging. A cellular and architectural pattern-based approach can help narrow down the differential diagnoses. In the meantime, molecular understanding has resulted in a rapid expansion and redefining of salivary gland neoplasms. Herein, we reviewed salivary gland cytology which focused on four patterns: basaloid, oncocytic/oncocytoid, mucinous/cystic/secretory and spindle, along with updated immunohistochemical and molecular features.</p></div>","PeriodicalId":100612,"journal":{"name":"Human Pathology Reports","volume":"36 ","pages":"Article 300742"},"PeriodicalIF":0.0,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772736X24000148/pdfft?md5=77491f0bfa35b5b76fab22c17933e02d&pid=1-s2.0-S2772736X24000148-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140621753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cytologic assessment of thyroid nodules – Updates in 2023 Bethesda reporting system, diagnostic challenges and pitfalls","authors":"Xiaobing Jin, Xin Jing","doi":"10.1016/j.hpr.2024.300743","DOIUrl":"https://doi.org/10.1016/j.hpr.2024.300743","url":null,"abstract":"<div><p>This review summarizes changes and updates in the most recently published 2023 Bethesda System for Thyroid Cytopathology (TBSRTC). Further, the review focuses on challenges and pitfalls encountered in cytologic assessment of thyroid fine needle aspiration (FNA) specimens, with an emphasis on atypia of undetermined significance (TBSRTC category III) and the impact on risk of malignancy (ROM) among TBSRTC diagnostic categories following implementation of the terminology noninvasive follicular neoplasm with papillary-like nuclear features (NIFTP). The role of molecular testing as an adjunct to FNA cytology will be discussed.</p></div>","PeriodicalId":100612,"journal":{"name":"Human Pathology Reports","volume":"36 ","pages":"Article 300743"},"PeriodicalIF":0.0,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772736X2400015X/pdfft?md5=48d25cbcc58619bb1c7163158cb50e03&pid=1-s2.0-S2772736X2400015X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140622501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Decoding lymph nodes: The crucial role of cytopathologists in diagnosing possible lymphoma","authors":"Udit K Naik, Y. Helen Zhang","doi":"10.1016/j.hpr.2024.300740","DOIUrl":"https://doi.org/10.1016/j.hpr.2024.300740","url":null,"abstract":"<div><p>Cytopathologists have assumed a progressively pivotal role in diagnosing lymphoproliferative disorders. This review outlines a concise approach to the work-up of suspected lymphoma in cytopathology practice, emphasizing the integration of cytomorphologic evaluation with ancillary studies. These include the application of rapid onsite evaluation (ROSE) for proper specimen triage, immunophenotyping through flow cytometry (FC) and immunohistochemistry (IHC), and molecular studies on cytology/small biopsy specimens. Furthermore, the review provides a brief introduction to the forthcoming WHO Reporting System in Lymph Node Cytopathology.</p></div>","PeriodicalId":100612,"journal":{"name":"Human Pathology Reports","volume":"36 ","pages":"Article 300740"},"PeriodicalIF":0.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772736X24000124/pdfft?md5=d3138136158e6521228e736c6b5b94d7&pid=1-s2.0-S2772736X24000124-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140558979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rong Xia , Xiaoying Liu , Cristina H. Hajdu , Wenqing Cao , James N. Kaz , Tamas Gonda , Aylin Simsir
{"title":"The utility of molecular studies on pancreatic cystic lesions: A comprehensive review","authors":"Rong Xia , Xiaoying Liu , Cristina H. Hajdu , Wenqing Cao , James N. Kaz , Tamas Gonda , Aylin Simsir","doi":"10.1016/j.hpr.2024.300741","DOIUrl":"https://doi.org/10.1016/j.hpr.2024.300741","url":null,"abstract":"<div><p>Pancreatic cystic lesions, frequently detected in abdominal imaging, pose diagnostic challenges due to their varying malignancy potential. This review article focuses on the crucial role of molecular diagnostics in differentiating these lesions, with an emphasis on the significance of <em>KRAS</em> and <em>GNAS</em> mutations identified through endoscopic ultrasound-guided fine needle aspiration (EUS-FNA). The use of next-generation sequencing (NGS) is highlighted for its precision in detecting genetic changes, crucial for accurate diagnosis and guiding management decisions.</p><p>Integration of molecular studies into standardized reporting for pancreaticobiliary cytopathology is also discussed, enhancing diagnostic accuracy. The potential of precision oncology, informed by molecular insights, is explored for targeted treatments of pancreatic cystic lesions.</p><p>Commercial platforms like PancreaSeq® Genomic Classifier and PancraGEN® are assessed for their effectiveness in analyzing pancreatic cystic fluid, proving beneficial in cases where traditional methods fall short.</p><p>In summary, molecular studies are indispensable in evaluating pancreatic cystic lesions, offering a pathway to more personalized treatment and management strategies in patient-centered care.</p></div>","PeriodicalId":100612,"journal":{"name":"Human Pathology Reports","volume":"36 ","pages":"Article 300741"},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772736X24000136/pdfft?md5=d9247f2a17e6528a0255145a63cf2ac4&pid=1-s2.0-S2772736X24000136-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140547154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Updates and challenges in serous fluid cytopathology","authors":"Hannah H. Chen , Xiaoying Liu , Qun Wang","doi":"10.1016/j.hpr.2024.300738","DOIUrl":"https://doi.org/10.1016/j.hpr.2024.300738","url":null,"abstract":"<div><p>Serous fluids, encompassing pleural, pericardial, and peritoneal fluids, exhibit a wide spectrum of neoplastic and non-neoplastic conditions. Malignant effusions commonly result from metastasis, particularly from adenocarcinomas, and less frequently from primary malignant mesothelioma. Cytologic assessment of serous effusions remains an invaluable tool, especially with the expanding role of ancillary techniques available to resolve diagnostically challenging cases. The recently introduced International System for Reporting Serous Fluid Cytopathology (TIS) establishes a standardized reporting system with five distinct diagnostic categories: nondiagnostic (ND), negative for malignancy (NFM), atypia of undetermined significance (AUS), suspicious for malignancy (SFM), and malignant (MAL). Understanding the distribution of malignancy in serous fluids by site of origin in effusion cytology is important, especially in patients with an unknown primary. Immunohistochemistry (IHC) combined with clinical and radiologic data plays a crucial role in confirming malignancy, establishing the primary site, determining the stage, predicting prognosis, monitoring recurrence, and influencing medical management. This review aims to provide an overview of TIS reporting system, emphasizing its malignant category. It provides updates on the distribution of malignancies in serous fluids and discusses valuable IHC panels based on differential diagnosis, addressing challenging cases within this context.</p></div>","PeriodicalId":100612,"journal":{"name":"Human Pathology Reports","volume":"36 ","pages":"Article 300738"},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772736X24000100/pdfft?md5=d443fce159aed6e6b1613f9f5c399145&pid=1-s2.0-S2772736X24000100-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140209043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Navigating the horizon: The world health organization reporting system for liver cytopathology","authors":"Yan Gao, Y. Helen Zhang","doi":"10.1016/j.hpr.2024.300737","DOIUrl":"https://doi.org/10.1016/j.hpr.2024.300737","url":null,"abstract":"<div><p>The upcoming World Health Organization (WHO) Reporting System in Liver Cytopathology marks the first internationally applicable system for diverse medical infrastructure settings. This system categorizes cases into five groups: Insufficient/Inadequate/Nondiagnostic, Benign, Atypical, Suspicious for Malignancy, and Malignant. Each category is associated with a risk of malignancy (ROM), guiding recommendations for further diagnostic testing to achieve specific diagnoses or refine differential diagnoses and follow-up management. The primary goal is to enhance and standardize cytopathology reporting, improve communication between cytopathologists and clinicians, and ultimately elevate patient care. The online WHO System provides direct access to the WHO Classification for Tumours 5th Edition. This review delves into the latest classification guidelines, addresses terminology standardization, navigates diagnostic complexities, and aligns patient management options with cytopathological interpretations, contributing to an overall enhancement of patient care.</p></div>","PeriodicalId":100612,"journal":{"name":"Human Pathology Reports","volume":"36 ","pages":"Article 300737"},"PeriodicalIF":0.0,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772736X24000094/pdfft?md5=6b2e0d3133feee7deebc5220b7c295fc&pid=1-s2.0-S2772736X24000094-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140190974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tiannan Wang , Wei Huang , Brian S Finkelman , Huina Zhang
{"title":"Malignant Brenner tumor of the ovary: Pathologic evaluation, molecular insights and clinical management","authors":"Tiannan Wang , Wei Huang , Brian S Finkelman , Huina Zhang","doi":"10.1016/j.hpr.2024.300739","DOIUrl":"https://doi.org/10.1016/j.hpr.2024.300739","url":null,"abstract":"<div><p>Malignant Brenner tumor (MBT) of the ovary is exceedingly rare, and studies of MBT have been limited to case reports and small case series. MBT shares similar clinical and radiological presentations with other ovarian epithelial malignancies, and the diagnosis of MBT is predominantly based on histopathologic evaluation. Recently, relatively large retrospective studies have advanced understanding of their histogenesis and malignant transformation, as well as on the clinical management of this rare subtype of ovarian carcinoma. In this article, we review the published English literature on MBT, with an emphasis on the histopathologic evaluation, molecular biology, and clinical management of MBT.</p></div>","PeriodicalId":100612,"journal":{"name":"Human Pathology Reports","volume":"36 ","pages":"Article 300739"},"PeriodicalIF":0.0,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772736X24000112/pdfft?md5=7d2c45ce9d1451e9b6eaee957f6889b4&pid=1-s2.0-S2772736X24000112-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140195711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Updates and challenges in pancreatic cytopathology","authors":"Patrick Yang , Liying Han , Zhongren Zhou","doi":"10.1016/j.hpr.2024.300736","DOIUrl":"https://doi.org/10.1016/j.hpr.2024.300736","url":null,"abstract":"<div><p>The World Health Organization (WHO) has recently introduced an international approach to standardize reporting of pancreaticobiliary cytopathology. The WHO Reporting system for Pancreaticobiliary Cytopathology (WHO system) introduces two distinct categories for non-invasive premalignant lesions of the ductal system, based on cytomorphological grading: “pancreatic neoplasm of low risk/grade” (PaN-low) and “pancreatic neoplasm of high risk/grade” (PaN-high). This reclassification aims to provide a more precise assessment of risks of malignancy (ROM) for different neoplastic categories. The WHO system focuses on the diagnostic categories, their associated ROM, and recommended management per category.</p><p>Pancreatic neoplasms comprise various histological types, each displaying distinct background features that can assist in the diagnostic process. Recognizing background features like mucin background, necrotic background, desmoplastic stroma, cancer-associated fibroblasts, and stromal fragments presents notable challenges. Certain background features may overlap across histological types.</p><p>In this review, we present a summary of the key updates in the WHO system and highlight diagnostic challenges associated with background features.</p></div>","PeriodicalId":100612,"journal":{"name":"Human Pathology Reports","volume":"36 ","pages":"Article 300736"},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772736X24000082/pdfft?md5=9ae5a9ecdaa95b3111706cea9a316c0f&pid=1-s2.0-S2772736X24000082-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140191005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qun Wang , Xiaoying Liu , Min Cui , Xiaoqin Zhu , Hannah H. Chen
{"title":"Pancreatic mesenchymal neoplasms diagnosed by endoscopic ultrasound-guided fine needle aspiration/biopsy: A concise review","authors":"Qun Wang , Xiaoying Liu , Min Cui , Xiaoqin Zhu , Hannah H. Chen","doi":"10.1016/j.hpr.2024.300734","DOIUrl":"https://doi.org/10.1016/j.hpr.2024.300734","url":null,"abstract":"<div><p>The mesenchymal tumors of the pancreas account for approximately 1–2% of all pancreatic neoplasms and they are not commonly encountered in our daily practice. When these rare entities are seen during endoscopic ultrasound (EUS)-guided fine-needle aspiration (FNA) with rapid onsite evaluation (ROSE) or EUS-guided fine-needle biopsy (FNB) specimens sampled from the pancreas, it is usually difficult to establish a diagnosis solely based on cytohistology due to the significant overlapping cytomorphological features among these neoplasms. Ancillary studies including immunohistochemical stains and molecular testing are critical to reach the correct final diagnosis. Here, we reviewed the pancreatic mesenchymal neoplasms diagnosed with EUS-FNA cytology specimens or EUS-FNB small biopsy specimens. Gastrointestinal stromal tumors (GIST), solitary fibrous tumors (SFT), paraganglioma, perivascular epithelioid cell tumor (PEComa), and Granular cell tumor were discussed in detail each with a representative case from our practice collections. The characteristic cytohistological features and immunostaining markers for each entity are highlighted for differential diagnosis. In summary, cytopathologists need to be vigilant for these rare entities and perform necessary immunostaining to establish an accurate diagnosis.</p></div>","PeriodicalId":100612,"journal":{"name":"Human Pathology Reports","volume":"36 ","pages":"Article 300734"},"PeriodicalIF":0.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772736X24000069/pdfft?md5=62bfaa5f7761d47b9c14e5e88129ab29&pid=1-s2.0-S2772736X24000069-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140180364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}