Independent Validation of a HER2-Low Focused Immunohistochemistry Scoring System for Enhanced Pathologist Precision and Consistency.

For 2 decades, the American Society of Clinial Oncology-College of American Pathologists human epidermal growth factor receptor 2 (HER2) testing criteria have included 0 and 1+ scores, but this distinction was inconsequential. Now, based on the DESTINY Breast-04 Trial (DB-04) results, for patients with metastatic breast cancer it underpins eligibility for trastuzumab-deruxtecan treatment. Discerning 0 from 1+ immunohistochemistry (IHC) staining is challenging, as HER2 low is not a biologically distinct cancer subset, there are no reference standards or controls, and second-tier tests (eg, in situ hybridization) do not apply.

Development and Validation of a HER2-Low Focused Immunohistochemical Scoring System With High-Interobserver Concordance: The Australian HER2-Low Breast Cancer Concordance Study.

The DESTINY Breast-04 trial revealed survival advantages of trastuzumab deruxtecan for women with metastatic HER2-low breast cancer (1+ or 2+ immunohistochemistry [IHC], without amplification). Although this trial applied the 2018 Americal Society of Clinial Oncology (ASCO)/College of American Pathologists (CAP) HER2 IHC scoring criteria, the subjectivity and imprecision in IHC scoring have raised concerns that patients' treatment may be misaligned. Our group of 9 experienced breast pathologists collated a deidentified set of 60 breast cancer core biopsies from 3 laboratories, evaluated with the Ventana 4B5 HER2 assay and mostly scored locally as HER2 0 or 1+.

Ameloblastic Carcinoma With Orbital Invasion.

Ameloblastic carcinomas are malignant tumors arising from the odontogenic epithelium and defined as having features of ameloblastic differentiation in addition to cytological features of malignancy. Orbital involvement is rare and generally involves invasion of the orbital floor, apex, or soft tissue. This report describes an advanced presentation of ameloblastic carcinoma with orbital invasion and provides a review of the literature.

Pancreatic heterotopia of the gallbladder - possible cause of right upper quadrant pain, a case report.

Pancreatic heterotopia is characterized by ectopic pancreatic tissue found outside the pancreas without any anatomical or vascular connection to the pancreas. Pancreatic heterotopia of the gallbladder is a rare histological finding; there have been only a handful of cases described in the literature. Pancreatic heterotopia of the gallbladder is usually diagnosed incidentally at histological examination following cholecystectomy or autopsy.

The impact of 2018 ASCO-CAP HER2 testing guidelines on breast cancer HER2 results. An audit of 2132 consecutive cases evaluated by immunohistochemistry and in situ hybridization.

The 2018 iteration of the ASCO-CAP HER2 testing guidelines proposes significant changes with an emphasis on the integration of concurrent immunohistochemistry (IHC) and in situ hybridization (ISH). We wished to evaluate the impact of these changes on clinical practice. Between Jan 2012 to Feb 2017, 2132 consecutive invasive breast carcinomas were evaluated with IHC and ISH for HER2.

Testicular and paratesticular pathology in children: a 12-year histopathological review.

Background: Our institution is the principal pediatric surgical referral center for a population of 1.6 million. The objective of this study was to determine the spectrum and incidence of pediatric testicular and paratesticular pathology in this population.

Ophthalmology and vision science research: part 5: surfing or sieving--using literature databases wisely.

Literature databases are an ever-expanding resource available to the field of medical sciences. Understanding how to use such databases efficiently is critical for those involved in research. However, for the uninitiated, getting started is a major hurdle to overcome and for the occasional user, the finer points of database searching remain an unacquired skill.

Ophthalmology and vision science research. Part 4: avoiding rejection--structuring a research paper from introduction to references.

As part of an ongoing series, this fourth article is the second of 2 related articles that deal with the basics of producing a high-quality manuscript. Although ophthalmology and vision science are the principal focus of this series, the general concepts essential to producing a quality manuscript are applicable to diverse fields of research. This article provides guidelines on how to present research findings in a structured form using the Introduction, Methods, Results, and Discussion (IMRaD) style.

Ophthalmology and vision science research: Part 3: avoiding writer's block--understanding the ABCs of a good research paper.

Completion of a scientific manuscript for submission to a peer-reviewed journal is a daunting task for clinicians and scientists early in their careers. In an ongoing series, this third article is the first of 2 related articles that deal with the basics of producing a high-quality research manuscript. Although ophthalmology and vision science are the principal focus of this series, the general concepts essential to producing a quality manuscript are applicable to diverse fields of research.

Ophthalmology and vision science research: part 2: How to commence research--Eureka or that's a little unusual?

Understanding the key elements that increase the likelihood of project success is fundamental for those embarking on research. The first article in this series placed scientific journals in perspective in relation to Journal Impact Factors and citation indices. This second article in a series primarily aimed at those commencing research, particularly in the area of ophthalmology and vision science, delineates the interrelated components that are required to complete a research project.