case_images: PMC11824516_01
case_images: CT findings of asymmetric rectus abdominis hypertrophy in a patient with Parkinson's disease. An axial CT scan parallel to the L4 vertebral endplate revealed marked thickening of the left rectus abdominis muscle (white arrow, maximum thickness of 10.0 mm) with well-defined borders and homogeneous density, in contrast to the thin right rectus abdominis muscle (hollow arrow, thickness of 3.7 mm). The mean CT attenuation values were 46 HU and 12 HU for the left and right rectus abdominis muscles, respectively, thus indicating increased tissue density on the left side, which was consistent with sustained muscle contraction. CT, computed tomography; HU, Hounsfield unit.
case_images: jmd-24230f1.jpg
case_images: PMC11824516_01_jmd-24230f1.jpg
case_images: f1-jmd-24230
case_images: Enhanced abdominal computed tomography (CT) and CT angiography demonstrated marked thickening of the left rectus abdominis measuring approximately 10 mm (with a mean CT value of 46 Hounsfield unit [HU]), whereas the contralateral muscle was thin at 3.7 mm (with a mean CT value of 12 HU) (Figure 1).