[Is intraneural neurolysis in ulnar nerve sulcus syndrome justified?].

A follow-up of thirty-seven patients with ulnar nerve entrapment at the elbow is presented. External neurolysis was performed in fourteen cases, whereas internal neurolysis involving interfascicular dissection was performed in twenty-three cases. When indicated, internal neurolysis can lead to very good results. However, unnecessary interfascicular dissection may result in unwarranted impairment of hand function.