Die zytologische Diagnostik von Umfangsvermehrungen der Haut, Unterhaut und Mundhöhle bei Hund und Katze -Eine retrospektive Unstersuchung (1995)

In a retrospective study, fine needle aspiration biopsies of different cutaneous, subcutaneous, and oral proliferations from 1949 dogs and 463 cats were examined cytologically and compared with histopathological studies in the literature. In 9-22% of the biopsies in different locations, a cytological examination could not be performed because of a poor quality of the slide. Sarcoma, melanoma, adenocarcinoma, adenoma, carcinoma, squamous cell carcinoma, malignant histiocytosis, histiocytoma, basalioma, plasmocytoma, mastocytoma, lipoma, and malignant lymphoma were diagnosed in different frequency dependend on their location. In the group of cutaneous proliferations, there was a considerable low amount of basalioma (0.3% in the dog, 1.7% in the cat). These tumors might frequently not be diagnosed because of the non-specific diagnostic features on cytological slides. Also mastocytoma in the cat was diagnosed only rarely compared to the frequency in histopathological surveys, The frequency of non-neoplastic proliferations like inflammations, cysts, eosinophilic granuloma, and hematoma was different depending on the location. Since there was a predominance of non-neoplastic masses in the limbs in the cat, neoplastic proliferations were predominant in the perianal region in the dog while non-neoplastic lesions were predominant in the cervical region in the dog. Mesenchymal proliferations were diagnosed in 3-6% in dogs and 1-14% in cats. These are slides with reactive fibroblasts and inflammatory cells as well as fibrocytes which can be part of neoplastic but also non-neoplastic diseases, In most of the locations the cytological diagnoses of neoplasia were similar to histopathological observations. Different frequencies in the present cytological survey might be caused by methodical problems of cytology and will be explained in this article.