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Falconieri, Giovanni, MD; Luna, Mario A., MD; Pizzolitto, Stefano, MD; DeMaglio, Giovanna, ScD; Angione, Vito, MD; Rocco, Maurizio, MD
Annals of diagnostic pathology, 10/2008, Letnik: 12, Številka: 5Journal Article
Abstract We report 13 cases of squamous cell carcinoma (SCC) of the oral cavity characterized by a prominent eosinophilic infiltration of the stroma. All patients were adults, 10 men and 3 women (aged 54 to 92 years; median, 71 years). They presented with tumors of the gingiva (5 cases), tongue (3 cases), palatine tonsil (2 cases), palate (2 cases), and mucosal aspect of lip (1 case). Metastatic involvement of regional lymph nodes was seen in 5 cases. The metastatic foci were associated with heavy eosinophilia as well. No patient had an abnormal eosinophil count in blood. Microscopically, the clusters of eosinophils were characteristically noticed in intimate admixture with the advancing edge of squamous carcinoma, either as nests or small tumor cords. The pattern of eosinophilic infiltration was comparable, regardless of tumor site or grade. Data from our series indicate that SCC with a reactive inflammatory infiltrate rich in eosinophils is consistently associated with stromal invasion. This observation may be useful in dealing with small tissue fragments where subepithelial stromal invasion cannot be easily assessed by conventional criteria. In addition, our data seem to confirm that eosinophil-rich SCC, although associated with metastatic involvement of cervical lymph node, seems to pursue a less aggressive course if compared with ordinary SCC.
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