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The Merck Manual--Second Home Edition logo
 
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Chapter 181. Symptoms and Diagnosis of Cancer
Topics: Introduction | Symptoms | Diagnosis
 
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Introduction

Cancer can produce many different symptoms, some subtle and some not at all subtle. Some symptoms develop early in the course of cancer and are therefore important warning signs that should be evaluated by a doctor. Other symptoms develop only after the cancer progresses and are therefore not helpful in the early detection of cancer. Still other symptoms, such as nausea, loss of appetite, fatigue, and vomiting, may be the result of treatment or may be warning signs. Some symptoms occur with many or almost all cancers, and others are specific to the type of cancer and where it is growing.

Screening programs allow early detection and diagnosis of cancer. The earlier cancer is diagnosed, the more effective treatment is likely to be.

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