合并小鼓室1例，耳咽管和鼓室窦畸形扩大1例。
Small tympanic cavity and enlarged eustachian tube and tympanic sinus were found in 1 case respectively.
目的研究下鼓室窦的形态及变异，为下鼓室及迷路下显微外科手术提供应用解剖学资料。
Objective To provide applied anatomic data for the microsurgery of hypotympanum and infralabyrinthine by studying the shape and variation of hypotympanumic sinus.
目的：探讨硬质内镜下进行鼓室窦和面神经隐窝的应用解剖学研究，为内镜在中耳手术中的应用提供解剖学资料。
Objective:To explore the anatomic characteristics of sinus tympani and facial recess and provide anatomical data for the operation on the middle ear using endoscope technique.
标本切片与CT图像对照，对颞骨内砧骨窝、鼓索隆起、茎突隆起、面神经隐窝、鼓室窦、岬小桥、外耳道上棘等结构进行观察。
Foramen incudis, chordal eminence, styloid eminence, facial recess, sinus tympani, ponticulus and suprameatal spine were identified on anatomic slices and CT images respectively.
标本切片与CT图像对照，对颞骨内砧骨窝、鼓索隆起、茎突隆起、面神经隐窝、鼓室窦、岬小桥、外耳道上棘等结构进行观察。
Foramen incudis, chordal eminence, styloid eminence, facial recess, sinus tympani, ponticulus and suprameatal spine were identified on anatomic slices and CT images respectively.
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