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Short tandem repeat analysis: a practical tool to identify specimen mix-ups in the pathology laboratory

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Abstract

Despite all precautions in pathology laboratories, contaminations and specimen mix-ups still occur and can negatively impact both patients and institutions. We present two cases in which short tandem repeat (STR) analysis was used to assert the correct identity of specimens. The first patient had a biopsy diagnosis of triple negative invasive carcinoma of no special type of the breast. Sample mix-up with another biopsy was suspected, because in her post-chemotherapy mastectomy specimen, a hormone receptor–positive lobular carcinoma was diagnosed. STR analysis displayed a complete common loci profile of the patient’s biopsy and mastectomy, supporting that no mix-up occurred. The second patient underwent hysterectomy due to cervix squamous cell carcinoma. A fragment of adenocarcinoma was identified and confirmed by STR profile to be a contaminant. STR analysis is a fast, easy-to-perform, and widely available technique which can clarify contaminations and specimen mix-ups in pathology laboratories.

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Authors and Affiliations

Authors

Contributions

Carla Bartosch devised the manuscript’s original idea. Paula Monteiro was responsible for laboratory records review. Sara Cardoso was responsible for STR technical execution, and David João, Sara Cardoso, and Carla Bartosch contributed to results interpretation. David João wrote the manuscript with the support of Sara Cardoso, Carla Bartosch, and Conceição Leal. Carla Bartosch made the figures. David João, Carla Bartosch, Conceição Leal, Paula Monteiro, and Sara Cardoso revised and approved the final manuscript.

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Correspondence to David João.

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Informed consent for sample research use and study publication was obtained from the patients.

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The authors declare no competing interests.

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João, D., Cardoso, S., Monteiro, P. et al. Short tandem repeat analysis: a practical tool to identify specimen mix-ups in the pathology laboratory. Virchows Arch 483, 549–554 (2023). https://doi.org/10.1007/s00428-023-03578-7

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  • DOI: https://doi.org/10.1007/s00428-023-03578-7

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