Photodynamic Surgery for Feline Injection-Site Sarcoma

Figure 2

Histopathological image of FISS (Courtesy of dr. S. Iussich). Upper panel, multiple nodules of fusiform cells arranged in sheets in abundant hyaline stroma infiltrating the subcutaneous tissue (H&E, 2x objective); lower panel, multiple nodules of fusiform cells arranged in sheets in moderate myxoid stroma; the cells (20-30 μ in diameter) are characterized by scant cytoplasm, ovalar and vesicular nuclei with 1 nucleolus not always visible; low mitotic index (0-1/HPF) (H&E, 20x objective).