Winking owl sign (spine)
Citation, DOI & article data
The (absent) pedicle sign, also called the winking owl sign, occurs on plain radiograph of the spine when a pedicle is absent 5.
The term, winking owl sign, where the missing pedicle corresponds to the closed eye, the contralateral pedicle to the other round open eye, and the spinous process to the beak of the owl on AP views of the thoracic or lumbar spine 1,2.
There is a wide etiology 3,4:
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- 2. Boos N, Aebi M (eds). Spinal disorders: Fundamentals of diagnosis and treatment. Springer Berlin (2008) ISBN-10: 3540405119. Read it at Google Books
- 3. Yochum TR, Rowe LJ. Essentials of Skeletal Radiology. Lippincott Williams & Wilkins. (2005) ISBN:0781739462. Read it at Google Books - Find it at Amazon
- 4. Ortiz D. Reeder and Felson's gamuts in radiology. Praeger. ISBN:0313312168. Read it at Google Books - Find it at Amazon
- 5. Lloyd J Ridley, Jason Han, William E Ridley, Hao Xiang. Winking owl sign: Unilateral absent pedicle. (2018) Journal of Medical Imaging and Radiation Oncology. 62: 168. doi:10.1111/1754-9485.37_12786 - Pubmed