Reidenbach M M
Institute of Anatomy, Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany.
Surg Radiol Anat. 1995;17(2):107-11, 4-5. doi: 10.1007/BF01627567.
The topographic relations of the conus elasticus were studied with special regard to the local spread of laryngeal cancer. Sections of twelve plastinated adult human larynges were investigated. Lateral from the median cricothyroid ligament, the conus elasticus reveals two broad gaps containing adipose tissue and blood vessels. Along these routes, tumors of the larynx may easily extend into the ventral extralaryngeal tissues by continuous growth. Fibres of the conus elasticus cover the entire cranial surface of the vocalis muscle near the muscle's insertion at the thyroid cartilage. This part of the conus elasticus has been termed "thyroglottic ligament" in the fetus [22]. In the adult, this ligament prevents early cancer of the anterior vocal cords from invading adjacent structures. Other collagenous fibres continuous with the conus elasticus provide only an incomplete layer separating the lateral cricoarytenoid and the thyroarytenoid muscle. These fibres do not constitute an effective barrier against cancer growth.
为特别关注喉癌的局部扩散情况，对弹性圆锥的局部解剖关系进行了研究。对12个经塑化处理的成人喉部标本进行了切片研究。在环甲正中韧带外侧，弹性圆锥显示出两个宽大的间隙，其中含有脂肪组织和血管。沿着这些路径，喉肿瘤可通过持续生长而轻易延伸至喉外腹侧组织。弹性圆锥的纤维覆盖了声带肌在甲状软骨附着处附近的整个颅面。弹性圆锥的这一部分在胎儿期被称为“甲状舌骨韧带”[22]。在成人中，该韧带可防止声带前部早期癌症侵犯相邻结构。与弹性圆锥连续的其他胶原纤维仅提供了一层不完整的分隔，将环杓侧肌和甲杓肌分开。这些纤维并不能构成阻止癌症生长的有效屏障。
