proband
proband
English Definitions:
proband (Noun)
An individual who presents with a genetic disorder or other specific characteristic, when this leads to the investigation of the individual's family
Proband
Proband, or propositus, is a term used most often in medical genetics and other medical fields to denote a particular subject being studied or reported on. On pedigrees, the proband is noted with an arrow and the box or circle shaded accordingly. It is important to denote the proband, so that the relationship to other individuals can be seen and patterns established. In most cases, the proband is the first affected family member who seeks medical attention for a genetic disorder. Among the ancestors of the proband, there may be other subjects with the manifest disease, but the proband typically refers to the member seeking medical attention or being studied, even if affected ancestors are known. Often affected ancestors are unknown due to the lack of information regarding those individuals or about the disease at the time they lived. Other ancestors might be undiagnosed due to the incomplete penetrance or variable expressivity. The diagnosis of a proband raises the index of suspicion for the proband's relatives and some of them may be diagnosed with the same disease. Conventionally, when drawing a pedigree chart, instead of the first diagnosed person, the proband may be chosen from among the affected ancestors from the first generation where the disease is found.
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"proband." Kamus.net. STANDS4 LLC, 2024. Web. 2 May 2024. <https://www.kamus.net/english/proband>.
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