x-ray of cervical spine: bony ankylosis of posterior elements at C6-C7 level
x-ray of cervical spine: bony ankylosis of posterior elements at c6-c7 level
x-ray of cervical spine: bony ankylosis of posterior elements at C6-C7 level (procedure)
x-ray of cervical spine: bony ankylosis of posterior elements at c6-c7 level (procedure)