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November 2023

Test adds twists to lung disease diagnosis

November 2023—It was a mystery, wrapped less in an enigma than a few layers of bafflement, surprise, and mild irritation. Call it the Case of the Split Lung Specimens. The first hint something was amiss came when Alain Borczuk, MD, vice chair of anatomic pathology and co-director of thoracic pathology, Northwell Health, noticed that he and his colleagues were receiving more insufficient bronchoscopy specimens than usual. “When I say ‘increasing’—we don’t get that many bronchoscopies. It’s not like colon polyps,” says Dr. Borczuk, who is also director of oncologic pathology, Northwell Health Cancer Institute. Normally they would get a handful a week, some of them straightforward cancer cases, although these additional cases were tied to noncancerous conditions. And then the plot thickened even further, with missing pieces—literally. Though no guideline clearly states what constitutes an adequate specimen, Dr. Borczuk says, the samples he and his colleagues were seeing fell markedly short.

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In some settings, alternatives to HbA1c acceptable

November 2023—Glycated albumin and fructosamine are highly specific, with high levels suggesting hyperglycemia. This points to their utility in monitoring glycemic control in people with diabetes. “They’re quite useful in the setting of overt hyperglycemia,” said Elizabeth Selvin, PhD, MPH, at this year’s meeting of the Association for Diagnostics and Laboratory Medicine.

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Generative AI, from education to corner cases

Generative artificial intelligence—what it is, how it can be used in pathology, what stands in its way, why the excitement. CAP TODAY publisher Bob McGonnagle spoke about that and more with pathologists Bobbi Pritt, MD, MSc, and Scott Anderson, MD; Ajit Singh, PhD, of Stanford and Artiman Ventures; and Devon Snedden, a health care consultant in artificial intelligence. “There are a lot of excellent possibilities that we’re just starting to understand and explore for the field of pathology,” said Dr. Pritt of Mayo Clinic.

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AI-driven spatial biology: the next next-gen sequencing

November 2023—Spatial biology may be an emerging field, but Kenneth Bloom, MD, says he and other pathologists have been doing it “since we got the microscope.” And he argues it’s going to become “the new, most important lens we look through.” The reason is the emergence of new cancer treatments like immunotherapy and, most importantly, antibody drug conjugates like Enhertu, says Dr. Bloom, head of pathology for Nucleai, a company specializing in AI-powered spatial biology.

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Minds shift on digital path, ‘massive change’ predicted

Is digital pathology on the move? Two who know it well say it is. Esther Abels, a precision medicine and biomedical regulatory health science expert who is CEO of SolarisRTC and former president of the Digital Pathology Association, and Michael Rivers, vice president/lifecycle leader of digital pathology at Roche Tissue Diagnostics, spoke in September with CAP TODAY publisher Bob McGonnagle, who got their take on where things stand.

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Clinical pathology selected abstracts

November 2023—Among the many reasons unnecessary laboratory tests are ordered in a hospital are preselected orders on order sets, clinician habits, and trainee concerns. Laboratory tests are among the highest volume procedures performed in inpatient hospital care. Excessive use of these tests can lead to patient discomfort as a result of unnecessary phlebotomy and contribute to iatrogenic anemia and increased risk of bloodstream infections. It can also contribute to the rising cost of medical care. Many laboratory stewardship programs have been developed to improve how clinicians order and use lab tests.

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Anatomic pathology selected abstracts

November 2023—Claudin-4 is a sensitive and specific marker for carcinoma in effusion cytology. The authors examined the diagnostic use of claudin-4 versus MOC-31 and Ber-EP4 by comparing their sensitivity, specificity, positive predictive value, and negative predictive value in differentiating carcinoma from mesothelioma and benign/mesothelial hyperplasia in effusion specimens. They conducted a retrospective study on a cohort of 229 cytology specimens, including 211 effusion fluid and 18 fine-needle aspiration specimens. The cytologic categories included 134 carcinoma, 28 mesothelioma, 46 indefinite (suspicious and atypical), and 21 benign.

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Molecular pathology selected abstracts

November 2023—Dilated cardiomyopathy is characterized by dilation and weakening of one or both ventricles combined with impaired contractility. Although several external etiologies are associated with dilated cardiomyopathy (DCM), a familial form (comprising about half the known cases of DCM) has symptoms that tend to arise in mid-adulthood. Despite the genetic nature of the familial form, little is known about the genetic profile of the disease. Black patients have an increased familial risk of DCM and often have a worse prognosis. The authors conducted a study in which they used genomic ancestry to compare the rare variant genetic architecture of DCM within a diverse patient population.

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Q&A column

November 2023 Q. A molecular laboratory received an order from an oncologist for next-generation sequencing testing. The patient’s tissue sample was in the custody of a different laboratory, which has a policy requiring patient consent to release materials for reference lab testing. The oncologist planned to obtain consent from the patient during a scheduled appointment, but the patient’s condition unexpectedly worsened and the patient could no longer travel for the appointment. Neither the custodial laboratory nor the treating health system have mechanisms for electronic consent. As a result of the lack of options for obtaining consent remotely and the custodial laboratory’s stringent consent policy, potentially life-altering NGS testing was delayed for more than a month. Is this restrictive approach to releasing patient material for reference laboratory testing supported by CAP guidelines? Read answer. Q. Is it acceptable to perform weak D testing on a newborn who has an RhD-negative blood type and a positive direct antiglobulin test? We know a positive DAT might cause false-positive results on an Rh test, but can it cause false-negative results? Read answer.

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Newsbytes

November 2023—“The best way to have a good idea is to have a lot of ideas,” according to Linus Pauling, a chemist and chemical engineer who, among other accomplishments, helped create a form of synthetic plasma. But when there is no structure in place to nurture those ideas, the result can be “a lot of people focused in a lot of different directions,” says Sky Soom, innovation analyst with Sonora Quest Laboratories.

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Put It on the Board

November 2023—Roche announced last month the U.S. launch of its Cobas Connection Modules (CCM) Vertical, the elevator and overhead components of its fully automated and modular CCM system to help low-, mid-, and high-volume laboratories optimize space, productivity, and patient care.

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