Page 111 - Differential Diagnosis in Small Animal Cytology, The Skin and Subcutis
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VetBooks.ir Pearls and Pitfalls
Malignant pilomatricoma may lack morphological features of atypia and the histological diag-
nosis of malignancy is often based only on the presence of infiltration of the surrounding tissues
and vascular invasion.
Fig. 8.16. Dog. Pilomatricoma. Numerous ghost cells seen. Another cytological differential for these findings is a
matrical cyst. Wright-Giemsa.
Fig. 8.17. Dog. Malignant pilomatricoma. Cuboidal epithelial cells lacking significant criteria or malignancy. The
diagnosis of malignancy was achieved on histopathology. Wright-Giemsa.
