Category: Dh-Dk
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Differentiated cancer
A cancer in which the cells are mature and look like cells in the tissue from it arose. Differentiated cancers tend to be decidedly less aggressive than undifferentiated cancers composed of immature cells.
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Differential diagnosis
The process of weighing the probability of one disease versus that of other diseases possibly accounting for a patient’s illness. The differential diagnosis of rhinitis (a runny nose) includes allergic rhinitis (hayfever), the abuse of nasal decongestants and, of course, the common cold.
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Diff dx
Abbreviation for differential diagnosis, the process of weighing the probability of one disease versus that of other diseases to account for a patient’s condition. Dx is the medical abbreviation for diagnosis.
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Diathesis
An elegant term for a predisposition or tendency. For example, hemorrhagic diathesis means a tendency to bleed.
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Diastolic
Referring to the time when the heart is in a period of relaxation and dilatation (expansion). The noun for diastolic is diastole. (The final letter in “diastole” is pronounced as a long “e” as in “lee.”) The diastolic pressure is specifically the minimum arterial pressure during relaxation and dilatation of the ventricles of the heart when the ventricles…
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Diastole
The time period when the heart is in a state of relaxation and dilatation (expansion). The final letter in “diastole” is pronounced as a long “e” as in “lee.” The adjective for diastole is diastolic. The diastolic pressure is specifically the minimum arterial pressure during relaxation and dilatation of the ventricles of the heart. Diastole is…
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Diarrhea
A common condition that involves unusually frequent and liquid bowel movements. The opposite of constipation. There are many infectious and noninfectious causes of diarrhea. Persistent diarrhea is both uncomfortable and dangerous to the health because it can indicate an underlying infection and may mean that the body is not able to absorb some nutrients due to a…
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Diaphragm (muscle)
The muscle that separates the chest (thoracic) cavity from the abdomen. The diaphragm is the main muscle of respiration. Contraction of the diaphragm muscle expands the lungs during inspiration when one is breathing air in. We rely heavily on the diaphragm for our respiratory function so that when the diaphragm is impaired, it can compromise our breathing. The nerve that…
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Dialysis machine
A machine used in dialysis that filters a patient’s blood to remove excess water and waste products when the kidneys are damaged,dysfunctional, or missing. The dialysis machine itself can be thought of as an artificial kidney. Inside, it consists of more plastic tubing that carries the removed blood to the dialyser, a bundle of hollow fibers that forms a…
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Dialysis
The process of removing waste products and excess fluid from the body. Dialysis is necessary when the kidneys are not able to adequately filter the blood. Dialysis allows patients with kidney failure a chance to live productive lives. There are two types of dialysis: hemodialysis and peritoneal dialysis. Each type of dialysis has advantages and disadvantages. Patients can usually choose…