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Updated: Jun 4, 2026

Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
Published on: November 21, 2017
[Differential diagnosis of fever]
1Katedra i Klinika Chorób Wewnetrznych i Reumatologii Slaskiego Uniwersytetu Medycznego w Katowicach ul. Ziołowa 45/47, 40-635 Katowice.
Abstract:
Fever is a common clinical phenomenon. In most cases, the cause of fever can be determined quickly. The clinical problem starts when the patient has fever for a long period without any easily detectable cause. The cause of fever can be classified as follows: infectious agent, neoplasm, immune or metabolic disorder, genetic abnormality of inflammasome functioning. The clinical course of fever may vary (continuous, remittent, intermittent, hectic). Detection of the cause of chronic fever is not always possible. In these cases fever of unknown origin is diagnosed.
Insights
Persistent fever, or fever of unknown origin, presents a diagnostic challenge when its cause isn't readily apparent. Understanding fever classification and clinical courses is crucial for diagnosis.
Area of Science:
- Clinical Medicine
- Pathophysiology
- Immunology
Context:
- Fever is a common clinical symptom with diverse underlying causes.
- Prolonged fever without an obvious source poses a significant clinical challenge.
- Accurate diagnosis is essential for effective patient management.
Purpose:
- To classify the potential causes of fever.
- To describe the clinical variations in fever presentation.
- To define fever of unknown origin (FUO).
Summary:
- Fever causes are broadly categorized into infectious agents, neoplasms, immune/metabolic disorders, and genetic inflammasome abnormalities.
- Fever's clinical course can manifest continuously, intermittently, or remittently.
- When the etiology remains elusive despite investigation, a diagnosis of fever of unknown origin is made.
Impact:
- Provides a structured approach to diagnosing complex fever cases.
- Highlights the importance of considering a wide range of differential diagnoses.
- Facilitates better clinical decision-making for patients with prolonged fever.
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