Conclusion Because the symptoms of the older patients 'febrile diseases are atypical, the diagnosis is more difficult.

结论老年人发热性疾病由于症状不典型，诊断较困难。

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Pseudogout is sometimes confused with gout because the symptoms are similar; however, it is caused by calcium phosphate, not uric acid.

由于假痛风的症状与痛风相似，故有时会混淆，不过，假痛风是由磷酸钙引起，而非尿酸。

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Ovarian cancer is one of the most deadly cancers, in part because the symptoms are so vague that women often are not diagnosed until it is too late.

卵巢癌是最致命的恶性肿瘤之一，部分原因就是因为它常缺乏任何症状，等到被诊断的时候常常已经都是晚期。

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Early identification of the disease may be difficult because many infected people do not show any immediate symptoms.

VOA: special.2010.01.04

Some patients are misdiagnosed as suffering from depression because many of the symptoms are the same - poor sleep patterns, depressed feelings and pain all over the body.

VOA: special.2011.07.26

But Mr. Hartl said the new disease was unlikely to be SARS itself, because the symptoms differ.

WSJ: Mysterious Virus Emerges in the Middle East

According to NHS Direct, this type of attack is often referred to as a mini-stoke because the symptoms often resemble a full stroke.

BBC: RELATED BBC SITES

It added that it can be difficult to diagnose measles because many of the symptoms are similar to other viral illnesses particularly in the early stages.

BBC: Swansea measles: Clinic quizzed over single jab claims