Fig. 7
From: Varus stress MRI in diagnosis of medial meniscal posterior root tear
A 54-year-old female employee, obese (BMI = 39.6 kg/m2), presented with a sudden onset of posteromedial right knee pain with a popping sound after a twisting injury. The patient had difficulty climbing the stairs and squatting for one week (acute or early period). By the comparison between the pre- and post-varus stress medial meniscus extrusion amount (MME). Without varus stress position (a and c), the coronal PD-SPAIR WI of the right knee shows a negative extruded medial meniscus of approximately 2.5 mm from the medial margin of the tibial plateau to the outer border of the extruded meniscus (orange arrow). With varus stress position (b and d), the MME changed from negative to positive extrusion of approximately 4.5 mm (white arrow)