Histologic Grading of Canine Cutaneous Mast Cell Tumors: Is There a Good System?

Histologic Grading of Canine Cutaneous Mast Cell Tumors: Is There a Good System?

Canine cutaneous mast cell tumors are one of the most commonly diagnosed neoplasms of the skin. Veterinary pathologists commonly grade these neoplasms utilizing the Patnaik grading system. Recently, a 2-tier grading system has been proposed. Comparisons between these two systems need to be performed to determine which grading system will most accurately identify aggressive mast cell tumors and allow for the selection of the most appropriate therapy.