=====Claw sign=====

Modic type 1 degenerative signal changes can mimic/suggest infection, leading to additional costly and sometimes invasive investigations. 

A retrospective study analyzes the utility and accuracy of a novel, diffusion-weighted "claw sign" for distinguishing symptomatic type 1 degeneration from vertebral diskitis/osteomyelitis.

{{::claw_sign.jpg|}}


In patients with type 1 signal changes of the vertebral disk space, a claw sign is highly suggestive of degeneration and its absence strongly suggests diskitis/osteomyelitis
((Patel KB, Poplawski MM, Pawha PS, Naidich TP, Tanenbaum LN. Diffusion-weighted
MRI "claw sign" improves differentiation of infectious from degenerative modic
type 1 signal changes of the spine. AJNR Am J Neuroradiol. 2014
Aug;35(8):1647-52. doi: 10.3174/ajnr.A3948. Epub 2014 Apr 17. PubMed PMID:
24742801.
)).