Detecting mast cells on a feline blood smear points toward which tumor?

Detecting mast cells on a feline blood smear points toward which tumor?

• A. Lymphoma
• B. Mast Cell Tumor
• C. Hemangiosarcoma
• D. Osteosarcoma

Answer: (B)

Seeing mast cells on a feline blood smear points toward mast cell tumor because the tumor arises from mast cells, and malignant mast cells can circulate in the bloodstream when the disease is systemic. This circulating mast cell population is not typical for the other tumor types listed, which originate from different cell lines (lymphoid, osteogenic/mesenchymal, or vascular) and do not characteristically shed mast cells into the blood. So the presence of mast cells in the blood most strongly supports a diagnosis of a mast cell tumor.

Seeing mast cells on a feline blood smear points toward mast cell tumor because the tumor arises from mast cells, and malignant mast cells can circulate in the bloodstream when the disease is systemic. This circulating mast cell population is not typical for the other tumor types listed, which originate from different cell lines (lymphoid, osteogenic/mesenchymal, or vascular) and do not characteristically shed mast cells into the blood. So the presence of mast cells in the blood most strongly supports a diagnosis of a mast cell tumor.