異所性平滑筋組織を有する先天性舌腫瘤の1例

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概要

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• We encountered and reported a case of congenital tongue mass that developed on the dorsum of the tongue in a boy aged 1 and a half months. Histologically, it was a tissue malformation involving tissues such as smooth muscle, striated muscle, lymphatic vessels, blood vessels and salivary glands. So, diagnosis of heterotopic tissue was made. Congenital tongue mass has been reported as tongue anomaly, hamartoma, leiomyoma or benign mesenchymoma in literature, there being no unity in terminology. Many of the cases reported concern small pedunculated masses that developed on the dorsum of the tongue, and cases diagnosed as having hamartoma predominated. These tongue masses are diagnosed as tissue malformation histologically and somewhat different from true tumors in many cases. Hamartoma has a character intermediate between true tumors and malformations. Primarily it shows the structure deemed as overgrowth of tissue elements at the site of development, being applied to a relatively wide range of lesions. Accordingly, the term hamartoma is not appropriate for diagnosis of small masses of the tongue having heterotopic tissue. Benign mesenchymoma may fall under the category of hamartoma. However, it is one that stresses the concept of tumor and moreover, it is aimed at lesions which lack epithelial elements and in which several kinds mesenchymal elements are admixed. In contrast, congenital tongue masses contained epithelial elements such as salivary glands in many reported cases. Therefore, the term benign mesenchymoma is not preferable in the diagnosis of congenital tague mass. Leiomyoma is also tumor, and encapsulation is noted in many of the cases reported. However, the presence of capsules is not observed at all in the reported cases of congenital tongue mass, so far as the cases mentioned are concerned. So, dealing with congenital tongue mass regarded as tissue malformation as tumor is open to question. At present, there is no evidence that tissue malformation is of one stage of differentiation of tumor. So, tissue malformation needs to be strictly differentiated from tumor.<BR>As to a mass that is histologically regarded as tissue malformation, therefore, it would be preferable to refrain from using such a term that may be confuses with "tumor".

著者

• 高橋 洋平

  国立名古屋病院病理

• 林 和馬

  国立名古屋病院臨床検査科

• 高橋 洋平

  国立名古屋病院臨床検査科

• 北島 高子

  国立名古屋病院歯科口腔外科

• 山田 博基

  国立名古屋病院歯科口腔外科

• 玉城 廣保

  国立名古屋病院歯科・口腔外科

• 藤本 和久

  国立名古屋病院歯科・口腔外科

• 山家 誠

  国立名古屋病院歯科・口腔外科

• 山田 博基

  国立名古屋病院歯科・口腔外科

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