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PathWays Case Study: June 27

​This case study is a consultation case with limited clinical history on a 79-year-old man with left pleural effusion. The thoracentesis-fluid cytology, smear, and cell block, are shown below. The tumor cells were positive for MOC-31 and BerEP4 (focal), and negative for calretinin, D2-40, and CDX-2 immunohistochemistry stains.

Subsequently, additional information became available as the patient was brought to Mayo Clinic for biopsy of the mass. The findings of this resection are shown below:

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Simone Terra, M.D.
Resident, Anatomic and Clinical Pathology
Mayo Clinic

Diva Salomao, M.D.
Consultant, Division of Anatomic Pathology
Mayo Clinic
Professor of Laboratory Medicine and Pathology
Mayo Clinic College of Medicine and Sciences

Joanne (Eunhee) Yi, M.D.
Consultant, Division of Anatomic Pathology
Mayo Clinic
Professor of Laboratory Medicine and Pathology
Mayo Clinic College of Medicine and Sciences

apriljosselyn

apriljosselyn

April Josselyn is a Marketing Channel Manager at Mayo Clinic Laboratories. She has worked at Mayo Clinic since 2012. Outside of work, April enjoys the outdoors and being "hockey mom" for her two sports-crazed boys.