ERUPTION MESENCHYMAL CALCIFIED HAMARTOMA: A CASE REPORT

Abstract

Eruption mesenchymal calcified hamartoma (formerly known as eruption sequestrum) is an uncommon proliferation of odontogenic calcified structures, usually observed in the opercula of lower first molars of delayed eruption. A 6-year-old Brazilian girl was seen for routine dental examination. A fragment of hard whitish tissue was observed in the gingiva overlying the erupting lower first permanent molar, which showed radiographic appearance of a 0.5-cm faint round radiopacity above and separated from the occlusal surface of the related molar. The patient was submitted to an excisional biopsy, and gross examination showed a hardened whitish fragment surrounded by gingival mucosa. Microscopically, limited proliferation of cords of odontogenic epithelium was observed in association with small concentric basophilic calcifications and few large, round osteodentin and pulp-like structures. There were numerous inflammatory cells and small blood vessels in the surrounding connective tissue. The final diagnosis was eruption mesenchymal calcified hamartoma. Eruption mesenchymal calcified hamartoma (formerly known as eruption sequestrum) is an uncommon proliferation of odontogenic calcified structures, usually observed in the opercula of lower first molars of delayed eruption. A 6-year-old Brazilian girl was seen for routine dental examination. A fragment of hard whitish tissue was observed in the gingiva overlying the erupting lower first permanent molar, which showed radiographic appearance of a 0.5-cm faint round radiopacity above and separated from the occlusal surface of the related molar. The patient was submitted to an excisional biopsy, and gross examination showed a hardened whitish fragment surrounded by gingival mucosa. Microscopically, limited proliferation of cords of odontogenic epithelium was observed in association with small concentric basophilic calcifications and few large, round osteodentin and pulp-like structures. There were numerous inflammatory cells and small blood vessels in the surrounding connective tissue. The final diagnosis was eruption mesenchymal calcified hamartoma.