- Hemolytic-uremic syndrome (HP:0005575): A thrombotic microangiopathy with presence of non-immune, intravascular hemolytic anemia, thrombocytopenia and acute kidney injury. A vicious cycle of complement activation, endothelial cell damage, platelet activation, and thrombosis is the hallmark of the disease. Evidence: PCS. Frequency: 3/5. (PMID:15173250)
- Decreased circulating complement C3 concentration (HP:0005421): Concentration of the complement component C3 in the blood circulation below the lower limit of normal. Evidence: PCS. Frequency: 2/3. (PMID:15173250)
- Hematuria (HP:0000790): The presence of blood in the urine. Hematuria may be gross hematuria (visible to the naked eye) or microscopic hematuria (detected by dipstick or microscopic examination of the urine). Evidence: TAS. (OMIM:612923)
- Proteinuria (HP:0000093): Increased levels of protein in the urine. Evidence: TAS. (OMIM:612923)
- Acute kidney injury (HP:0001919): Sudden loss of renal function, as manifested by decreased urine production, and a rise in serum creatinine or blood urea nitrogen concentration (azotemia). Evidence: TAS. (OMIM:612923)
- Microangiopathic hemolytic anemia (HP:0001937). Evidence: PCS. Frequency: 3/5. (PMID:15173250)
- Anemia (HP:0001903): A reduction in erythrocytes volume or hemoglobin concentration. Evidence: TAS. (OMIM:612923)
- Childhood onset (HP:0011463): Onset of disease at the age of between 1 and 5 years. Evidence: PCS. Frequency: 1/3. (PMID:15173250)
- Young adult onset (HP:0011462): Onset of disease at the age of between 16 and 40 years. Evidence: PCS. Frequency: 2/3. (PMID:15173250)
- Hypertension (HP:0000822): The presence of chronic increased pressure in the systemic arterial system. Evidence: TAS. Frequency: Frequent (HP:0040282). (OMIM:612923)
- Anuria (HP:0100519): Absence of urine, clinically classified as below 50ml/day. Evidence: TAS. (OMIM:612923)
- Thrombocytopenia (HP:0001873): A reduction in the number of circulating thrombocytes. Evidence: TAS. (OMIM:612923)
- 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:15173250)
- Elevated circulating creatinine concentration (HP:0003259): An increased amount of creatinine in the blood. Evidence: TAS. (OMIM:612923)
- Increased blood urea nitrogen (HP:0003138): An increased amount of nitrogen in the form of urea in the blood. Evidence: TAS. (OMIM:612923)
These phenotypes are associated with the disease atypical hemolytic-uremic syndrome with I factor anomaly (OMIM:612923).