2015 Volume 61 Issue 2 Pages 115-119
We report a rare case of mycosis fungoides arising in the right upper gingiva. A 58-year-old woman with a history of lumbar mycosis fungoides visited our clinic because of a reddish swelling in the right upper molar gingiva. A gingival biopsy was performed with the patient under local anesthesia. Histopathologically, the lesion showed dense infiltration of T cells with cellular atypia in the epithelial layer. Immunohistochemical studies for CD3, CD4, and CD5 showed positive staining, indicating that the phenotype was identical to that of the lumbar mycosis fungoides lesion. The final diagnosis was therefore mycosis fungoides of the right upper gingiva. There has been no evidence of stage progression as of 4 years after diagnosis.
