Fever of unknown origin classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:

Overview

Based upon the work of Petersdorf and Beeson, Durack and Street classified fever of unknown origin(FUO) into four distinct categories in 1991:

1. Classical FUO
2. Neutropenic FUO
3. HIV related FUO
4. Nosocomial FUO

Classification

There is no established system for the classification of [disease name].

OR

[Disease name] may be classified according to [classification method] into [number] subtypes/groups:

• [Group1]
• [Group2]
• [Group3]
• [Group4]

OR

[Disease name] may be classified into [large number > 6] subtypes based on:

• [Classification method 1]
• [Classification method 2]
• [Classification method 3]

[Disease name] may be classified into several subtypes based on:

• [Classification method 1]
• [Classification method 2]
• [Classification method 3]

OR

Based on the duration of symptoms, [disease name] may be classified as either acute or chronic.

OR

If the staging system involves specific and characteristic findings and features:

According to the [staging system + reference], there are [number] stages of [malignancy name] based on the [finding1], [finding2], and [finding3]. Each stage is assigned a [letter/number1] and a [letter/number2] that designate the [feature1] and [feature2].

OR

The staging of [malignancy name] is based on the [staging system].

OR

There is no established system for the staging of [malignancy name].