Genes involved and how it is passed on
About 15 genes are usually deleted. HNF1B does most of the work. The deletion is autosomal dominant: it can come from a parent (often a parent who is mildly affected and undiagnosed) or arise new in the child.
You have two copies of chromosome 17 - one from each parent. In this condition one copy is missing a small piece. That is called autosomal dominant: one altered copy is enough to have the condition.
Two ways it happens:
- Inherited from a parent. Roughly half to two-thirds of cases. Because the condition varies so
much, the parent often had no diagnosis - they may just have had "a kidney problem", "mild diabetes", or "speech therapy as a kid". Testing the parents is how families find this out.
- New (de novo): neither parent carries it. It happened when the reproductive cells formed. Then
the recurrence risk for future children is low (but not zero).
If a parent carries the deletion, each pregnancy has a 50% chance of inheriting it. That number is the same for boys and girls.
Because a parent can carry the deletion and feel perfectly well, a "negative family history" does not rule it out - which is why parental testing after a child's diagnosis is recommended.
Freshest finding: Genetic testing is becoming a routine-and increasingly time-sensitive-tool in nephrology, with implications for diagnosis, prognosis, targeted therapy, transplant planning, and family counselling.
Gene-level detail
| Gene | Function | Why it matters here |
|---|---|---|
| HNF1B (HNF1beta, TCDF1) | Transcription factor; kidney, urinary tract, pancreas, liver, genital development | Haploinsufficiency causes the renal cysts/diabetes (RCAD/MODY5) spectrum; whole-gene deletion is a frequent cause of "MODY5" |
| LHX1 | Developmental transcription factor, works with HNF1B | Renal and Müllerian development; candidate for uterine anomalies |
| DDX52, GGNBP2, ACACA, TADA2A, MYO19, ZNHIT3, MRM1, PIGW, SYNRG, DHRS11, DUSP14, AATF, C17orf78 | Varied: RNA helicase, transcriptional co-regulators, fatty-acid synthesis, mitochondrial RNase P, etc. | Contributing modifiers for neurodevelopment; individual contributions not established |
Note on older literature and other tools: some summaries list TUBB3, KCNJ11, ABCC9 or SLC30A8 as "17q12 genes". They are not in the recurrent 17q12 deletion interval (TUBB3 is 16q24; KCNJ11/ABCC9 are 11p15; SLC30A8 is 8p23). This project's vocabulary deliberately excludes them so co-occurrence statistics are not polluted.
Mechanism and recurrence
- NAHR between the flanking segmental duplications (BP2/BP3/BP4) explains the recurrent,
stereotyped breakpoints.
- The mirror event - 17q12 recurrent duplication - involves the same interval and is a separate
condition with a different phenotype. Both are tracked here because papers compare them.
- Once a family carries the deletion, variable expressivity dominates: reported within-family
differences include one member with end-stage renal disease and another with only a small kidney difference and no symptoms.
Reproductive options discussed in the literature
Prenatal diagnosis (CVS/amniocentesis with targeted testing), preimplantation genetic testing for structural rearrangements (PGT-SR) with IVF, and cascade testing of adult relatives so that kidney and diabetes screening can start early. The last one is the cheapest, most actionable option and is frequently missed.
Latest evidence in the collected corpus
Ten tips for ordering, interpreting, and communicating genetic test results in nephrology
Genetic testing is becoming a routine-and increasingly time-sensitive-tool in nephrology, with implications for diagnosis, prognosis, targeted therapy, transplant planning, and family counselling.
“Novel disease/gene discovery If testing is negative, but the probability of a genetic etiology remains high (e.g. consanguinity, a striking syndromic phenotype, and multiple affected relatives), then consider referral pathways that support gene discovery…”corroboration 1 · confidence 97% · updated 2026-11-14 · source
LHX1
Protein-coding gene in the species Homo sapiens LIM homeobox 1 also known as Lim-1 is a protein that in humans is encoded by the LHX1 gene .
“(April 2011). "LIM-class homeobox gene Lim1, a novel oncogene in human renal cell carcinoma" .”corroboration 1 · confidence 97% · updated 2026-11-14 · source
A familial case report of 17q12 recurrent deletion syndrome: clinical and molecular characterization.
1664-2392 17 2026 Frontiers in endocrinology Front Endocrinol (Lausanne) A familial case report of 17q12 recurrent deletion syndrome: clinical and molecular characterization.
“1819047 1819047 1819047 10.3389/fendo.2026.1819047 This article presents the first reported familial case of 17q12 recurrent deletion syndrome in Russia, involving a female patient with diabetes and her daughter diagnosed with atypical autism without…”corroboration 1 · confidence 97% · updated 2026-11-14 · source
HNF1B gene: MedlinePlus Genetics
HNF1B gene HNF1 homeobox B Normal Function The HNF1B gene provides instructions for making a protein called hepatocyte nuclear factor-1 beta (HNF-1β).
“More About This Health Condition Congenital anomalies of kidney and urinary tract Mutations within the HNF1B gene are found in people with abnormalities of the kidneys and other structures of the urinary tract but without other features of 17q12 deletion…”corroboration 1 · confidence 97% · updated 2026-11-13 · source
From Guidelines to Practice: Pilot Implementation and Analytical Boundaries of a Focused ADPKD-Spectrum Gene Panel
Methods: We designed and evaluated a 28-gene ADPKD-spectrum hybrid-capture panel in a 16-sample, two-configuration pilot using 694 analytical target intervals per sample.
“Seven of nine panel-first cases yielded observations: one HNF1B and one unique-locus PKD1 finding were supported, whereas four duplicated-sequence PKD1 findings remained confirmation-dependent.”corroboration 1 · confidence 97% · updated 2026-11-13 · source
Clinical impact of genetic testing in inherited kidney diseases
Background Inherited kidney diseases (IKDs) and congenital anomalies of the kidney and urinary tract (CAKUT) are a clinically heterogeneous subset of chronic kidney disease and rank among the leading causes of kidney failure (KF), especially in younger patients.
“Conclusions Genetic testing provided clinically relevant diagnoses in nearly 40% of patients with suspected IKD, enabling more accurate prognostication and patient stratification.”corroboration 1 · confidence 97% · updated 2026-11-13 · source
Genomic Characterization of Pathogenic CNVs in a Familial Developmental Dyslexia Comorbid ADHD: A Case Study from Pakistan
Background Developmental dyslexia (DD) and attention-deficit/hyperactivity disorder (ADHD) frequently co-occur and are believed to share genetic risk factors.
“Genomic Characterization of Pathogenic CNVs in a Familial Developmental Dyslexia Comorbid ADHD: A Case Study from Pakistan Abstract Background Developmental dyslexia (DD) and attention-deficit/hyperactivity disorder (ADHD) frequently co-occur and are believed…”corroboration 1 · confidence 97% · updated 2026-11-13 · source
Prenatal Diagnosis and Genetic Etiology of Fetal Polycystic Kidney Disease: A Single-Center Retrospective Study of 147 Cases in Yunnan Province, Southwest China
Background Fetal polycystic kidney disease (FPDK) is a common ultrasound finding, but its genetic causes vary widely, and data from Yunnan Province are scarce.
“Prenatal Diagnosis and Genetic Etiology of Fetal Polycystic Kidney Disease: A Single-Center Retrospective Study of 147 Cases in Yunnan Province, Southwest China Abstract Background Fetal polycystic kidney disease (FPDK) is a common ultrasound finding, but its…”corroboration 1 · confidence 97% · updated 2026-11-13 · source
This entry is version 5. The analytical engine only appends the clearly-labelled “Latest evidence” section; the text above is curated and is not rewritten by the machine. Confidence 85% · last updated 2026-11-14 16:44