Carcinosarcoma of the parotid gland: cytological, clinicopathological and immunohistochemical study of a case.
Manifesting a putative origin from a pleomorphic adenoma, carcinosarcoma of the salivary gland is a heterologous neoplasm in which a sarcomatous and a carcinomatous component coexist. We present a parotid gland carcinosarcoma in a 77-year-old man with peculiar morphological findings. Fine-needle aspiration cytology allowed a preoperative diagnosis of poorly differentiated carcinoma. At histologic examination, the tumor showed biphasic differentiation with an epithelial component made up of well-differentiated keratinizing squamous carcinoma and ductal-type adenocarcinoma, and a mesenchymal component, revealing focal areas of osteosarcoma and myoepithelial malignant proliferation. Carcinosarcoma is a very rare malignant neoplasm, accounting for 0.16% of malignant salivary gland tumors: only 60 cases have been reported, some of which arose "de novo", i.e., without clinico-pathologic evidence of a pre- or co-existing pleomorphic adenoma.
Department of Pathology, S. Corona Hospital, Azienda Ospedaliera G. Salvini, Garbagnate Milanese, Italy.
M
M
Sironi
G
G
Isimbaldi
R
R
Claren
C
C
Delpiano
F
F
Di Nuovo
M
M
Spinelli
D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis; D001707:Biopsy, Needle; D002296:Carcinosarcoma / Q000737:chemistry / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D017809:Fatal Outcome; D006801:Humans; D008297:Male; D009363:Neoplasm Proteins / Q000032:analysis; D010306:Parotid Gland / Q000000981:diagnostic imaging / Q000473:pathology; D010307:Parotid Neoplasms / Q000737:chemistry / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed
D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins