コヤマ リョウタ   KOYAMA RYOTA
  小山亮太
   所属   医学部医学科 整形外科学
   職種   助教
言語種別 日本語
発表タイトル Ulnar neuropathy associated with nerve compression by a hypertrophic medial head of the triceps muscle.
会議名 第 30 回骨軟部放射線研究会
学会区分 研究会
発表形式 口頭
講演区分 一般
発表者・共同発表者◎木村裕介, 橘川薫, 小山亮太
発表年月日 2019/01/25
開催地
(都市, 国名)
広島
概要 A 19-year-old male who is a college wrestler presented with a one-month history of medial elbow pain and numbness involving the
ring and little finger. The symptoms worsened with elbow flexion. There was weakness of the adductor pollicis muscle and atrophy
of the first dorsal interosseous muscle. The Tinel sign was positive over the retro-condylar groove. A sensory nerve conduction
study demonstrated abnormal conduction slowing at 0-3 cm proximal to the cubital tunnel. MRI showed thickening and increased
signal intensity of the ulnar nerve on T2-weighted and STIR images at the cubital tunnel. The medial head of the triceps muscle
was prominent, and the ulnar nerve was compressed medially by the triceps muscle and bent toward the cubital tunnel. The Osborn
ligament was intact. The clinical diagnosis was severe ulnar neuropathy and ulnar nerve decompression was performed. Ulnar
nerve entrapment at the ligamentum epitrochleo-anconeus was confirmed during surgery.