Alveolar soft part sarcoma of tongue in a 3-year-old Taiwanese

Necrotizing sialometaplasia – Case report

“… 1 The diagnosis of necrotizing sialometaplasia usually does not need immunohistochemical staining to identify the cell types or origin of the tumor cells. 2 , 3 , 4 , 5 However, if needed, the immunostaining may be performed, and the low immunoreactivity for Ki-67 antigen or p53 protein can rule out the diagnosis of a squamous cell carcinoma or a mucoepidermoid carcinoma. 1 …”

Langerhans cell histiocytosis in an old man – Case report

“…Immunohistochemical staining is usually used for identification of origin of tumor cells. 2 , 3 , 4 , 5 In this study, although the Langerhans cells were characterized by the presence of coffee bean-like or indented vesicular nuclei by hematoxylin and eosin stain, they were usually confirmed as Langerhans cells by CD1a or S-100 protein immunostains. 1 More than 50% of LCH cases are seen in patients younger than age 15.…”

Oral giant cell fibroma: A report of three cases

“… 1 , 2 Immunohistochemical stains show that the giant cells are positive for vimentin and negative for cytokeratin, S-100 protein, neurofilament, and leukocyte common antigen, indicating these stellate giant cells in oral GCFs are of mesenchymal origin instead of epithelial, neurogenic, or hematogenous origin. 2 , 3 , 4 , 5 Oral GCFs can occur at any age. The mean age of the 24 Taiwanese patients with GCF is 29 years and approximately 60% of the lesions occur in the first three decades with the highest incidence being in the third decade.…”