Yamasoba T, Harada T, Nomura Y
Department of Otolaryngology, University of Tokyo, Japan.
Arch Otolaryngol Head Neck Surg. 1990 May;116(5):566-70. doi: 10.1001/archotol.1990.01870050066008.
The structure of the anterior epitympanic recess was examined in 50 human temporal bones. The recess was found in 48 temporal bones (96%) and showed three different structural types. In type A, the least developed type (38%), a main cavity is seen above the tensor tympanic fold. The recess is divided into two cavities by the tensor tympanic fold, which stretches to the anterosuperior tympanic tegmen in type B, the intermediate type (40%). The tensor tympanic fold is fused with the superior mallear fold in type C, the best-developed type (18%), with the recess being contiguous with the eustachian tube. The shape of the anterior epitympanic recess is influenced by the ratio between the cavities above and below the tensor tympanic fold, ie, by the embryologic development of the saccus anticus and the anterior saccule of the saccus medius. The structural variations in this recess must be kept in mind during the surgical management of middle ear diseases.
对50例人类颞骨的前鼓室上隐窝结构进行了检查。在48例颞骨（96%）中发现了该隐窝，并呈现出三种不同的结构类型。在A型中，即最不发达的类型（38%），在鼓膜张肌襞上方可见一个主腔。在B型中，即中间类型（40%），鼓膜张肌襞延伸至鼓室前上壁，该隐窝被鼓膜张肌襞分为两个腔。在C型中，即最发达的类型（18%），鼓膜张肌襞与锤骨上襞融合，隐窝与咽鼓管相邻。前鼓室上隐窝的形状受鼓膜张肌襞上下腔的比例影响，即受中耳前袋和中袋前囊的胚胎发育影响。在中耳疾病的手术治疗过程中，必须牢记该隐窝的结构变异。
