The morphology and behavior of feline cutaneous XXXX .

@entity5 @entity9600 @entity468 @entity11979
Correlation of histopathology with the behavior of cutaneous @entity9600 in 85 @entity468 revealed two distinct histologic subtypes which were predictive of biologic behavior. The first subtype comprised 65 @entity468 of various breeds which had solitary, discrete, dermal @entity5 composed of slightly atypical mast cells. Most @entity5 in this group were histologically and behaviorally benign. However, seven solitary @entity5 with marked anisocytosis and mitotic activity recurred or spread to other sites within 2 to 3 months. The second subtype occurred in 18 @entity468 which had discrete subcutaneous nodules composed primarily of histiocyte-like cells with equivocal cytoplasmic granularity after staining with @entity11979 . They were identified as mast cells by electron microscopy. Seventeen of the 18 affected @entity468 were Siamese. The histiocytic @entity9600 occurred predominantly in young @entity468 (less than 4 years) and were usually multiple. In the four @entity468 of this group for which we have prolonged follow-up data, the @entity5 underwent apparently spontaneous regression within 2 years of initial @entity5 detection. Two other @entity468 had @entity5 which contained mixtures of mast cell and histiocytic morphologies.
