1961年Petersdorf等将发热待诊下这样的定义:1、发热经常在38.3℃以上;2、热程长于三周;3、住院一周仍诊断不明者。后来各地学者均沿用此定义,本文就有关“发热待诊”几个问题进行探讨。一、发热待诊常见的病因及其发热机理过去30多年,对长期发热原因不明的病人作了广泛的研究。据Jacoby的统计,发热待诊的病例归纳为:①三大类主要原因。②少见疾病,其中感染占40％,含结核、心内膜 1961 Petersdorf will wait for the definition of fever such as the following: 1, fever is often above 38.3 ℃; 2, the heat longer than three weeks; 3, still unknown in hospitalized one week. Later, scholars all follow this definition, this article on the “fever to be diagnosed” to discuss several issues. First, the common cause of fever waiting for diagnosis and its mechanism of fever over the past 30 years, long-term fever for unknown reasons for a wide range of patients. According to Jacoby’s statistics, the cases of fever pending diagnosis are summarized as follows: ① The three main types of causes. ② rare diseases, of which 40% of infections, including tuberculosis, endocardial