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Our study proves that MIB-1 LI is not dependent on factors like age and sex and is solely dependent on histological grade. Though the average level of MIB-1 LI varies considerably in the different grades of astrocytomas, considerable overlap can be observed between them. MIB-1 LI is a very useful adjunct to the histopathological diagnosis and can be of great help in situations where the clinical and radiological findings do not correlate with histological diagnosis.

Primary non-Hodgkin lymphomas of the oral region are rare, accounting for 3–5% of all malignant lesions. Of these, peripheral T-cell lymphomas (PTCLs) are extremely rare with only a few cases reported in literature. We describe a case of 50-year-old female who presented with an indurated lesion on the tongue. PTCL was diagnosed after immunohistochemical and T-cell receptor gene rearrangement analysis. Although PTCL of oral cavity is extremely rare, the possibility should always be considered in the differential diagnosis of T-lymphoid proliferations affecting this area.

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