We report a case of solitary fibrous tumor (SFT) of the pleura with special reference to stamp and scratch cytology. A 49-year-old man showed a shadow on chest X-ray film. The cytologic appearance was variable, showing dimorphic tumor cells, monolayered cell clusters, isolated cells, collagen bands, and inflammatory cells such as foamy histiocytes and lymphocytes. Tumor cells are reactive for both CD-34 & vimentin, and negative for cytokeratins.
We report a case of pleomorphic adenoma with cystic squamous differentiation of the parotid gland. Needle aspirates of the tumor showed numerous squamous cells without a mucous background. Cuboidal epithelial cells and stromal cells were few. Histopathologically, cystic change in the pleomorphic adenoma formed a large central space lined with stratified differentiated squamous epithelia. Incorrect diagnosis is prevented by paying sufficient attention to determining benign squamous differentiation in pleomorphic adenoma.
A 6 year-old boy was diagnosed with infected renal cysts that were removed in pieces. Cytological examination of purulent fluid from the cysts during surgery contained a few isolated keratinizing aquamous cells and hair shafts with inflammatory background. Intrarenal cystic teratoma is very rare. Differential diagnosis of intrarenal cysts is paramount, especially in children, to ensure the correct choice of therapy. In our case, we found cytologic examination duning surgery to be useful in dianosis.
We report a case of nasal polyps with stromal atypical cells in a 5-year-old boy, whose cytologic features simulated rhabdomyosarcoma. A polypoid lesion of the left nasal cavity grew rapidly and showed a necrotic, hemorrhagic surface. Aspiration cytology showed spindle to polygonal cells with 1 or 2 oval nuclei in the necrotic and hemorrhagic background. Conspicuous nucleolei were observed in these cells. Cytologically, possible embryonal rhabdomyosarcoma was initially suspected. However, histology disclosed a few atypical cells without mitosis scattered in edematous stroma, and finally was interpreted as nasal polyps with stromal atypia. It was suggested that the number of atypical cells, low mitotic rate, and absence of intracytoplasmic glycogen in atypical cells are important in cytologically differentiating this from rhabdomyosarcoma.