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Pseudohypoaldosteronism, type IB3, autosomal recessive(PHA1B3)

MedGen UID:
1824029
Concept ID:
C5774256
Disease or Syndrome
Synonym: PHA1B3
 
Gene (location): SCNN1G (16p12.2)
 
Monarch Initiative: MONDO:0859318
OMIM®: 620126

Definition

Autosomal recessive pseudohypoaldosteronism type IB3 (PHA1B3) is characterized by renal salt wasting and high concentrations of sodium in sweat, stool, and saliva. The disorder involves multiple organ systems and is especially threatening in the neonatal period. Laboratory evaluation shows hyponatremia, hyperkalemia, and increased plasma renin activity with high serum aldosterone concentrations. Respiratory tract infections are common in affected children and may be mistaken for cystic fibrosis (CF; 219700). Aggressive salt replacement and control of hyperkalemia results in survival, and the disorder appears to become less severe with age (review by Scheinman et al., 1999). [from OMIM]

Clinical features

From HPO
Vomiting
MedGen UID:
12124
Concept ID:
C0042963
Sign or Symptom
Forceful ejection of the contents of the stomach through the mouth by means of a series of involuntary spasmic contractions.
Dehydration
MedGen UID:
8273
Concept ID:
C0011175
Disease or Syndrome
A condition resulting from the excessive loss of water from the body. It is usually caused by severe diarrhea, vomiting or diaphoresis.
Hyperkalemia
MedGen UID:
5691
Concept ID:
C0020461
Finding
An abnormally increased potassium concentration in the blood.
Hyponatremia
MedGen UID:
6984
Concept ID:
C0020625
Finding
An abnormally decreased sodium concentration in the blood.
Metabolic acidosis
MedGen UID:
65117
Concept ID:
C0220981
Pathologic Function
Metabolic acidosis (MA) is characterized by a fall in blood pH due to a reduction of serum bicarbonate concentration. This can occur as a result of either the accumulation of acids (high anion gap MA) or the loss of bicarbonate from the gastrointestinal tract or the kidney (hyperchloremic MA). By definition, MA is not due to a respirary cause.
Increased circulating aldosterone concentration
MedGen UID:
6960
Concept ID:
C0020428
Disease or Syndrome
Overproduction of the mineralocorticoid aldosterone by the adrenal cortex.
Increased circulating renin concentration
MedGen UID:
66818
Concept ID:
C0240783
Finding
An increased level of renin in the blood.

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