Necrosis is a pathological process characterized by the death of cells or tissues in a living organism. It is not classified as a sign or symptom itself, but rather it is a condition that can be identified through signs and symptoms in the body.
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Sign: A sign is an objective indication of a medical condition that can be observed by others, such as a healthcare professional. For example, necrosis may present as discoloration, swelling, or an area of dead tissue that can be seen on examination.
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Symptom: A symptom is a subjective experience reported by the patient, such as pain or discomfort in the affected area.
In summary, necrosis is a pathological condition, and the signs and symptoms associated with it may vary depending on the location and cause of the necrosis.