“…One case in which angiosarcoma was thought to be a metastasis in the thyroid was excluded [5]. Follow-up data were available in 46 cases [2,3,4,5,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,27,31,33,34]. Seven cases were unsuccessfully followed-up [2,3,19,28,29], one died of unrelated causes [2], and the remaining four cases had incomplete data.…”