上顎洞に発生した濾胞性歯嚢胞の2症例

Two Cases of Dentigerous Cyst in the Maxillary Sinus

　Ⅰ．緒言　濾胞性歯嚢胞は顎骨内に発生する歯原性嚢胞の一つで，大半は嚢胞腔に歯冠を包含する含歯性嚢胞である。歯科，口腔外科からの報告は多くみられるが，上顎洞に進展する症例が比較的稀なため耳鼻咽喉科からの報告は少ない。今回われわれは上顎洞に進展した2症例を経験したので，若干の文献的考察を併せて報告する。

Two cases of dentigerous cyst occurring in the maxillary sinus were reported. The first case was a 63-year-old man suffered from purulent dis-charge from gingival fistula. The cyst occupied alower part of the right maxillary sinus and the right upper molar was found in it. The second case was a 9-year-old girl presenting a left cheek swelling. The cyst involved the left maxillary sinus and originated from the supernumerary tooth.

Computed tomography revealed a dental shadow and a homogeneous cystic shadow. In the firstcase, the cyst was enclosed with high-density bony wall. Orthopantomogram was useful to know the spatial distribution and ultrasonography was also useful to know the fluid content.

Since the reports by the otolaryngologists were only a few, a bibliographic review was briefly discussed.