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Lymphomatoid granulomatosis (LYG) is an uncommon Epstein-Barr virus (EBV)-associated B-cell lymphoproliferative disorder distinct
from lymphoma. LYG primarily occurs in the lung with or without accompanied lesions in the skin, central nervous system, kidney,
gastrointestinal tract, nose, eyes, liver and oral cavity. Solitary extrapulmonary LYG is extremely rare, and whether solitary lesions progress
onto pulmonary development and dysfunction is controversial. Herein, we report a case on a solitary LYG in the maxilla gingiva with
bone exposure in a patient who had been taking methotrexate for rheumatoid arthritis.
Key words : Lymphomatoid granulomatosis, Methotrexate, Maxilla, Epstein-Barr virus