種子軟骨(輪状咽頭靱帯の)Sesamoid cartilage of cricopharyngeal ligament(Cartilago sesamoidea ligamentum cricopharyngei)
種子軟骨(輪状咽頭靱帯の)【しゅしなんこつ(りんじょういんとうじんたいの)】 Elastic pieces of cartilage that are occasionally present in the anterior end of the vocal ligaments and near the arytenoid cartilage.