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Trait

Fetal pyelectasis

Mild pyelectasis is defined as a hypoechoic spherical or elliptical space within the renal pelvis that measures at least 5mm and not more than 10 mm. The measurement is taken on a transverse section through the fetal renal pelvis using the maximum anterior-to-posterior measurement.

HPO HP:0010945

Summary

Also called
Fetal renal pelvic dilatation, Foetal pyelectasis, Foetal renal pelvic dilatation, Mild fetal hydronephrosis, Mild foetal hydronephrosis
Body system
Abnormality of prenatal development or birthAbnormality of the genitourinary system

8 genes linked to Fetal pyelectasis

Changes in these genes cause rare conditions in which Fetal pyelectasis is seen. Most people with this trait have none of those conditions, and a gene on this list says nothing about anyone's own genome.

GeneHow often it is seenConditions
MYL9myosin light chain 9AlwaysIn 1 condition
ZBTB18zinc finger and BTB domain containing 18AlwaysIn 1 condition
PI4KAphosphatidylinositol 4-kinase alphaOften (30–79%)In 1 condition
BNC2basonuclin zinc finger protein 2Sometimes (5–29%)In 1 condition
CDC42BPBCDC42 binding protein kinase betaSometimes (5–29%)In 1 condition
CLCN3Cl-/H+ antiporter 3Sometimes (5–29%)In 1 condition
FGF13fibroblast growth factor 13Sometimes (5–29%)In 1 condition
TBCKTBC1 domain containing kinaseSometimes (5–29%)In 1 condition

How often is among people with one of the gene's conditions, the most often across them, as the Human Phenotype Ontology records it. These pages describe traits and the research behind them; they are not a diagnosis, and a doctor or genetic counsellor is the person to ask about symptoms.

Narrower traits

Broader traits

Abnormal fetal genitourinary system morphologyAbnormal renal pelvis morphologyFetal ultrasound soft marker

Where this comes from

  • The Human Phenotype Ontology, release 2026-09-01: the trait, its names, its definition and the genes linked to it. Find out more at hpo.jax.org.
  • Data release 2026.10.16-c6eea6bf.

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