Cellular War: The Dominance Struggle of Polycythemia Vera and Chronic Lymphocytic Leukemia Clones Within a Patient.

Background: Polycythemia vera (PV) and chronic lymphocytic leukemia (CLL) are distinct hematological malignancies. While their coexistence is rare, it poses unique diagnostic and therapeutic challenges.

Methods: A 50-year-old male patient presented with elevated hemoglobin levels and a marked lymphocytosis.

Reproducibility of the Paris System in Urine Cytology by Third-Year Pathology Residents.

Introduction: Standardized basic morphology and the algorithmic approach make the Paris System (TPS) for Reporting Urinary Cytology understandable and applicable. This study examined how well the TPS categories are understood by pathology residents and how well these criteria are enabling them reaching accurate diagnosis.

Materials/methods: A hundred consecutive cases representing all categories were selected.