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I found these when looking for something else, but think they are great. Good to show patients whats going on.
Although plain film radiography remains the appropriate
imaging technique used in the initial evaluation of ankle and foot
disorders, MR imaging has rapidly become important because It
provides high soft-tissue contrast and multlplanar capability,
and because it can detect subtle marrow abnormalities. MR
imaging is most useful for evaluating pathologic processes that
involve soft-tissue structures and for evaluating patients whose
clinical findings remain unexplained despite normal findings
with other imaging techniques. This pictorial essay illustrates
The os trigonum syndrome refers to symptoms produced by
pathology of the lateral tubercle of the posterior talar process.
Pain can be caused by disruption of the cartilaginous synchondrosis between the os tnigonum and the lateral talar tubercle as
a result of repetitive microtrauma and chronic inflammation.
Additional etiologies include trigonal process fracture, flexor
hallucis longus tenosynovitis, posterior tibiotalar impingement
by bone block, and intraarticular loose bodies. This pictorial
essay explores the role of imaging modalities in the diagnosis
and treatment of the os trigonum syndrome, a symptom cornplex that may present difficult diagnostic problems.
In this essay, we illustrate the spectrum of normal appearances of the posterior tibial tendon (PTT), flexor digitorum longus tendon, flexor hallucis longus tendon, and piantar calcaneonavicular ligament (PCNL) on 3DFT GRE images. Also, we describe the advantages of evaluating these structures with 3DFT GRE vs spinecho (SE) MR images, demonstrate the spectrum of abnormal findings seen in these structures on 3DFT GRE MR images in a large clinical series, and show the relationship of the accessory navicular bone to PiT abnormalities.