What is the relevance of the diagnosed and undiagnosed diseases in treating a pa

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When patients seek care from physicians, they may have manifestations or exacerbations of known conditions, or they may have symptoms and signs that suggest malfunction of a particular organ system. Sometimes the pattern of symptoms and signs is highly suggestive or even pathognomonic for a particular disease process. And the epidemiology, pathobiology, clinical manifestations, diagnosis, treatment, prevention, and prognosis of entities such as acute myocardial infarction, chronic obstructive lung disease, obstructive uropathy, inflammatory bowel disease, gallstones, rheumatoid arthritis, hypothyroidism, tuberculosis, and other know disease is understood. But there are times when many patients, however, have undiagnosed symptoms, signs, or laboratory abnormalities that cannot be immediately ascribed to a particular disease or cause. Whether the initial manifestation is chest pain, diarrhea, neck or back pain or any other abnormality the disease will only then be known when a proper understanding of the disease is done basing upon the signs and symptoms and a proper history and examination of the patient.