A ghost meniscus, also known as the empty meniscus sign, refers to a large radial tear that has completely transected the meniscus or, alternatively, previous meniscectomy.
On MRI knee when the slice plane is exactly in line with the meniscal tear this can produce either reduced signal of the involved meniscus from partial volume averaging or even a complete absence of the meniscus when there is a large-sized defect.
- 1. Petersen W, Forkel P, Feucht MJ et-al. Posterior root tear of the medial and lateral meniscus. Arch Orthop Trauma Surg. 2014;134 (2): 237-55. doi:10.1007/s00402-013-1873-8 - Pubmed citation
- 2. Davies AM, Cassar-Pullicino VN. Imaging of the Knee. Springer Science & Business Media. (2012) ISBN:3642559123. Read it at Google Books - Find it at Amazon