Gingival Hyperplasia Masquerading as Tumor Lesion, Possibly Linked to Amlodipine Use.

A 70-year-old woman under amlodipine treatment for hypertension presented with a hemorrhagic mass in the mandibular gingiva. Imaging studies revealed high signal intensity in T2-weighted MRI and moderate 18 F-FDG accumulation at the lesion's periphery. Although no malignancy was detected, the lesion continuously grew, prompting excision. Histopathological examination confirmed gingival hyperplasia attributed to amlodipine use. Drug-induced gingival hyperplasia typically presents as diffuse swelling; however, this lesion manifested as a polyp, posing diagnostic challenges. Reports on imaging findings for drug-induced gingival hyperplasia are limited. Understanding imaging patterns alongside clinical history aids in accurate diagnosis.