Wednesday, June 13, 2012

Vertebral Scalloping: Differential Diagnosis #26

Vertebral scalloping is typically caused by dural ectasia. The scalloping typically occurs posteriorly, but rarely may occur anteriorly as well. The mnemonic AMEN can be used to recall the common causes of this finding:

DiseaseNotes
AAcromegaly
Achondroplasia
Ankylosing spondylitis

scalloping in acromegaly secondary to hypertrophy
scalloping in achondroplasia due to small spinal canal 
MMasses
Mucopolysaccharidoses

e.g. Morquio's, Hurler's
EEhlers-Danlos syndrome
NNeurofibromatosis
Sagittal T2-weighted FSE MR Spine of a woman with achrondroplasia
Source: Radiology