Fig 2. (A) Resected mass presented a spherical shape with a capsule and had a gray-white and red surface; (B and C) HE stain showed a well-circumscribed nodular tumor composed of small muscular blood vessels with mucoid degeneration in it; (D and E) Smooth muscle cells showed immunoreactivity for h-caldesmon,smooth-muscle-actin; (F) Immunohistochemical stain showed HMB45 negative.