患者女，４７岁。因双下肢疼痛，行走困难一年，加重一月来诊。查体未见异常体征。临床怀疑腰骶椎间盘突出。Ｂ超所见，直肠局部前突，其后方显示一６．５ｃｍ×５．４ｃｍ×５．８ｃｍ不匀质实质性稍低回声团，边缘清楚，与骶尾骨关系密切，内部可见散在强回声团，伴声影... Patient female, 47 years old. Due to pain in both lower extremities, difficulty in walking for one year was aggravated in January. No abnormal physical signs were observed. Clinical suspicion of lumbosacral herniation. Seen from B-ultrasound, local rectocele, with a 6.5cm × 5.4cm × 5.8cm inhomogeneous, slightly lower echogenic group at the rear, clear edges, close relationship with sacrococcygeal bone, and visible internal scattered echo group , with sound and shadow...