Ulnar-sided wrist pain is one of the most common symptoms in athletes of baseball, racket sports, golf, and wrestling where there is frequent use of the hands as well as in soccer and running, where hand use is minimal. Compared with all wrist injuries, ulnar-sided wrist injury is a relatively serious condition for athletes because it plays an important role in performing a strong grip and in the rotation of the forearm. Ulnar-sided wrist pain in athletes can be related to acute trauma or chronic overuse. Acute trauma can lead to bone fractures and sprains/tears of ligaments. Repetitive mechanical stresses to tendons, ligaments, and the joint structures can lead to tendinitis or osteoarthrosis. Diagnosis of the ulnar-sided wrist pain is challenging both for hand surgeons and radiologists because of the small and complex anatomy. In the present article, we discuss mechanisms of wrist injury, sports-specific ulnar-sided wrist injuries, and the differential diagnosis of ulnar-sided wrist pain.

Background:Diagnosis of partial anterior cruciate ligament (ACL) tears is difficult on magnetic resonance imaging (MRI), particularly the isolated tears of the posterolateral bundle.Purpose:To describe 2 MRI signs of partial ACL tear involving the posterolateral bundle on conventional knee MRI sequences, specifically, the “gap” and “footprint” signs.Study Design:Case-control study.Methods:We retrospectively reviewed the MRI appearance of the ACL in 11 patients with arthroscopically proven partial ACL tears isolated to the posterolateral bundle, as well as in 10 patients with arthroscopically proven intact ACLs, and evaluated for the presence of gap and/or footprint signs.Results:There was high degree of sensitivity and specificity associated with the MRI findings of “gap” and “footprint” signs with arthroscopically proven isolated posterolateral bundle tears.Conclusion:Gap and footprint signs are suggestive of posterolateral bundle tear of the ACL, and the presence of 1 or both of these imaging findings should alert the radiologist to the possibility of a posterolateral bundle tear.

INTRODUCTION AND OBJECTIVES:• Myxoidliposarcoma (MLS) has a propensity to metastasize to osseous sites. • Reports in the literature suggest that FDG-PET, CT, and bone scan are insensitive and that MRI is the preferred modality for detecting metastatic disease in the bone marrow. • Whole body MRI (WBMRI) is relatively time consuming to perform when multiple sequences are used with standard equipment. • We present our initial experience utilizing WBMRI to evaluate for metastatic MLS and propose whole body STIR sequences as a methodology for screening for metastatic disease.