The two-eyed Scotty dog: a normal anatomic variant.

Area of Science:

• Radiology
• Orthopedic Imaging

Background:

• The "Scotty dog" sign is a classic indicator of spondylolysis on oblique lumbar spine radiographs.
• Anatomical variations can sometimes mimic or obscure classic radiographic findings.

Purpose of the Study:

• To present a case illustrating the
• a rare radiographic finding on lumbar spine oblique views.
• To explain the anatomical basis of this sign, specifically the role of the mammillary process.

Main Methods:

• Case presentation of a patient with lumbar spine radiographs.
• Radiographic analysis focusing on oblique views of the lumbar spine.
• Anatomical correlation of vertebral structures.

Main Results:

• Identification of the
• characterized by a second "eye" on the Scotty dog.
• Attribution of the second "eye" to a prominent mammillary process.
• Demonstration of how this anatomical variation can be mistaken for pathology.

Conclusions:

• The prominent mammillary process can create a " " appearance on oblique lumbar spine radiographs.
• Radiologists should be aware of this potential pitfall to avoid misdiagnosis.
• Understanding anatomical variations is crucial for accurate interpretation of spinal imaging.