RESUMEN
Idiopathic gingival fibromatosis is a rare benign oral condition characterized by a slowly progressive, non-hemorrhagic, fibrous enlargement of maxillary and mandibular attached and non-attached gingivae. A 14 year old female patient suffered from unusual gingival enlargement, more on the left side along with generalized aggressive periodontitis. The enlarged gingiva covered more than two-thirds of the clinical crowns. Marked inflammatory hyperplasia of epithelium and connective tissue of the gingiva was observed histopathologically. Perioscan test was performed, the results of which were negative. The diagnosis of Idiopathic gingival fibromatosis with aggressive periodontitis was made. Conventional periodontal therapy was performed followed by excision of the enlargement using gingivectomy procedure.