Primordial cystic odontoma: a rare case associated with aborted tooth

IF 2 3区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

Oral Surgery Oral Medicine Oral Pathology Oral Radiology Pub Date : 2025-03-14 DOI:10.1016/j.oooo.2025.01.009

Ana Luiza Oliveira Corrêa Roza, Stephanie Vargas de Freitas, Roberto Prado, Paula Paiva do Nascimento Izquierdo, Michelle Agostini, Aline Corrêa Abrahão, Mario José Romañach

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Abstract

An otherwise healthy 12-year-old girl was referred for evaluation upon an incidental radiographic finding during orthodontic treatment planning. Imaging exams revealed a 20 mm well-defined unilocular radiolucency containing a delicate peripheral radiopaque rim, closely related to the unformed crown of the lower third molar germ. An excisional biopsy was performed under local anesthesia. Grossly, a 10 mm fragment of a tooth germ was accompanied by a 10 mm round whitish mass of hard consistency and cystic eggshell appearance on the cut surface. Microscopic evaluation revealed a cyst lined by ameloblastic epithelium, surrounded by an outer layer of mineralized dentin and primitive dental papilla-like ectomesenchyme. The tooth germ revealed features consistent with an aberrant odontogenic process. The final diagnosis was primordial cystic odontoma (PCO) associated with an aborted third molar. We report an additional illustrative case of PCO, an ill-defined entity that should not be misinterpreted as other odontogenic lesions.

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原始囊性齿瘤：一例罕见的与流产牙相关的病例

一名健康的12岁女孩在正畸治疗计划中因偶然的x线摄影发现而被转介进行评估。影像学检查显示20毫米清晰的单眼透光度，周围有一个不透射线的边缘，与下第三磨牙胚芽未形成的牙冠密切相关。局部麻醉下行切除活检。肉眼可见，一个10毫米的牙胚碎片伴着一个10毫米的白色圆形硬质团块，切面呈囊性蛋壳状。显微镜检查显示囊肿内衬成釉上皮，周围是矿化牙本质和原始的牙乳头样外间质。牙胚显示出与异常牙形成过程一致的特征。最终诊断为原发性囊性齿瘤（PCO）与流产的第三磨牙。我们报告一个额外的说明性病例PCO，一个不明确的实体，不应该被误解为其他牙源性病变。

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来源期刊

Oral Surgery Oral Medicine Oral Pathology Oral Radiology DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

3.80

自引率

6.90%

发文量

1217

审稿时长

2-4 weeks

期刊介绍： Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology is required reading for anyone in the fields of oral surgery, oral medicine, oral pathology, oral radiology or advanced general practice dentistry. It is the only major dental journal that provides a practical and complete overview of the medical and surgical techniques of dental practice in four areas. Topics covered include such current issues as dental implants, treatment of HIV-infected patients, and evaluation and treatment of TMJ disorders. The official publication for nine societies, the Journal is recommended for initial purchase in the Brandon Hill study, Selected List of Books and Journals for the Small Medical Library.