Abstract：
Primordial odontogenic tumor (POT) was recently recognized in the 2017 World Health Organization (WHO) Classification as a distinct mixed odontogenic tumor most commonly observed in the posterior mandible of young patients. POT appears as an expansile radiolucency associated to an unerupted tooth. The aim of the present study was to perform a retrospective microscopic evaluation of pediatric odontogenic tumors diagnosed in an Oral Pathology Laboratory from Rio de Janeiro-Brazil, in order to reclassify potential cases as POT. From 150 cases of odontogenic tumors in children diagnosed in the last 50 years, one case filled the criteria for POT, being therefore better diagnosed as such. The patient was in the first decade of life and presented a well-defined expansile tumor in the posterior mandible, which had been initially diagnosed as immature complex odontoma. To the best of our knowledge, only 12 cases of POT have been reported in the English-language literature. We herein present an additional case of POT and review of its clinicopathological findings is offered.
摘要：
原始牙源性肿瘤（POT）最近在2017年世界卫生组织（WHO）分类中被认为是一种独特的混合牙源性肿瘤，在年轻患者的后下颌骨中最常见。POT表现为与未萌出的牙齿相关的可扩展的射线可透性。本研究的目的是对巴西里约热内卢口腔病理学实验室诊断的小儿牙源性肿瘤进行回顾性显微镜评估，以便将潜在病例重新分类为POT。从过去50年诊断的150例儿童牙源性肿瘤中，一个案例满足了POT的标准，因此，更好地诊断为这样。该患者处于生命的第一个十年，并在下颌骨后部出现了明确的扩张性肿瘤，最初被诊断为未成熟的复杂牙瘤。据我们所知,英语文献中仅报道了12例POT。我们在此提供另一例POT病例，并对其临床病理发现进行回顾。
