Orbital Lymphocytic Tumor Gradually Progressed to More Malignant Form during 4 Years

Primary lymphocytic tumor of the orbit is known as a relatively uncommon condition and difficult to diagnose in their types exactly even with microscopic examination. The authors experienced a reactive lymphoid hyperplasia patient, 42 years old male, which was progressed to atypical lymphoid hyperplasia during 4 years, confirmed by immunoperoxidase staining. In this case, steroid therapy was of no use and it shows resistance to combined chernotherapy.