Phenotypes associated with the disease thrombocythemia 3 (OMIM:614521):
- Thrombocytosis (HP:0001894): Increased numbers of platelets in the peripheral blood. Evidence: PCS. Frequency: 6/6. (PMID:22397670)
- Typified by somatic mosaicism (HP:0001442): Description of conditions in which affected individuals typically display somatic mosaicism, i.e., genetically distinct populations of somatic cells in a given organism caused by DNA mutations, epigenetic alterations of DNA, chromosomal abnormalities or the spontaneous reversion of inherited mutations. In many conditions typified by somatic mosaicism, constitutive mutation is lethal and cases are exclusively or predominantly mosaic. Evidence: TAS. (OMIM:614521)
- Ischemic stroke (HP:0002140): Acute ischemic stroke (AIS) is defined by the sudden loss of blood flow to an area of the brain with the resulting loss of neurologic function. It is caused by thrombosis or embolism that occludes a cerebral vessel supplying a specific area of the brain. During a vessel occlusion, there is a core area where damage to the brain is irreversible and an area of penumbra where the brain has lost function owing to decreased blood flow but is not irreversibly injured. Evidence: PCS. Frequency: 2/6. Onset: Adult onset (HP:0003581). (PMID:22397670)
- Increased micromegakaryocyte count (HP:0031386): The presence of abnormally high numbers of micromegakaryocytes in the bone marrow. Micromegakaryocytes are mononuclear diploid cells, with a nucleus similar in size to that of a myeloblast or promyelocyte with the cell being less than 30 micrometers in diameter. Evidence: IEA. (PMID:22397670)
- Autosomal dominant inheritance (HP:0000006): A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele. Evidence: PCS. (PMID:22397670)