RET

Chr 10AD

ret proto-oncogene

Also known as: CDHF12, CDHR16, HSCR1, MEN2A, MEN2B, MTC1, PTC, RET-ELE1

This gene encodes a transmembrane receptor and member of the tyrosine protein kinase family of proteins. Binding of ligands such as GDNF (glial cell-line derived neurotrophic factor) and other related proteins to the encoded receptor stimulates receptor dimerization and activation of downstream signaling pathways that play a role in cell differentiation, growth, migration and survival. The encoded receptor is important in development of the nervous system, and the development of organs and tissues derived from the neural crest. This proto-oncogene can undergo oncogenic activation through both cytogenetic rearrangement and activating point mutations. Mutations in this gene are associated with Hirschsprung disease and central hypoventilation syndrome and have been identified in patients with renal agenesis. [provided by RefSeq, Sep 2017]

Primary Disease Associations & Inheritance

{Hirschsprung disease, protection against}MIM #142623
AD
{Hirschsprung disease, susceptibility to, 1}MIM #142623
AD
Medullary thyroid carcinomaMIM #155240
AD
Multiple endocrine neoplasia IIAMIM #171400
AD
Multiple endocrine neoplasia IIBMIM #162300
AD
PheochromocytomaMIM #171300
AD
UniProtMultiple neoplasia 2B
UniProtMultiple neoplasia 2A
592
ClinVar variants
22
Pathogenic / LP
1.00
pLI score· haploinsufficient
12
Active trials
Clinical SummaryRET
🧬
Gene-Disease Validity (ClinGen)
multiple endocrine neoplasia type 2B · ADDefinitive

Definitive — sufficient evidence for diagnostic panels

2 total gene-disease associations curated

Population Constraint (gnomAD)
Highly constrained gene — heterozygous loss-of-function variants are very rare in the population (pLI 1.00). One damaged copy is likely sufficient to cause disease.
📋
ClinVar Variants
22 Pathogenic / Likely Pathogenic· 316 VUS of 592 total submissions
💊
Clinical Trials
12 active or recruiting trials — potential therapeutic options may be available

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

LoF intolerant — likely haploinsufficient
LoF Constraint?LOEUF (Loss-of-function Observed/Expected Upper bound Fraction) is the upper bound of the 90% CI for LoF OE — the preferred gnomAD v4 metric. Lower = more intolerant to LoF. LOEUF < 0.35 = highly constrained.
0.12LOEUF
pLI 1.000
Z-score 6.37
OE 0.04 (0.010.12)
Highly constrained

Among the most LoF-intolerant genes (~top 3%)

Missense Constraint?Missense Z-score: standard deviations fewer missense variants observed vs. expected. Z > 3.09 (p < 0.001) = gene does not tolerate missense variation. OE missense < 0.6 is also considered constrained.
0.96Z-score
OE missense 0.90 (0.840.96)
594 obs / 663.2 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios?Shaded band = 90% confidence interval. Vertical tick = point estimate. Grey threshold line = gnomAD constraint cutoff for that variant class.
LoF OE?Ratio of observed to expected LoF variants. Upper CI bound (LOEUF) ≤ 0.35 = strong LoF constraint signal.0.04 (0.010.12)
00.351.4
Missense OE?Ratio of observed to expected missense variants. OE ≤ 0.6 = fewer missense variants than expected by chance.0.90 (0.840.96)
00.61.4
Synonymous OE?Control metric — synonymous variants are largely neutral and expected near OE = 1.0. Significant deviation may indicate annotation issues.1.01
01.21.6
LoF obs/exp: 2 / 51.2Missense obs/exp: 594 / 663.2Syn Z: -0.09

ClinVar Variant Classifications

592 submitted variants in ClinVar

Classification Summary

Pathogenic11
Likely Pathogenic11
VUS316
Likely Benign218
Benign32
Conflicting4
11
Pathogenic
11
Likely Pathogenic
316
VUS
218
Likely Benign
32
Benign
4
Conflicting

Curated Variants Distribution

Classified variants from ClinVar · 5 ACMG categories

ClassificationLoFMissense + InframeNon-codingSynonymousTotal
Pathogenic
7
0
4
0
11
Likely Pathogenic
3
5
3
0
11
VUS
7
276
28
5
316
Likely Benign
0
13
86
119
218
Benign
0
0
2
30
32
Conflicting
4
Total17294123154592

LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly

View in ClinVar →

Protein Context — Lollipop Plot

RET · protein map & ClinVar variants

Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.

Gene2Phenotype Curations

RET-related multiple endocrine neoplasia IIA

definitive
ADGain Of FunctionAltered Gene Product Structure
SkinCancer
G2P ↗
missense variantinframe deletioninframe insertion

RET-related multiple endocrine neoplasia IIB

definitive
ADGain Of FunctionAltered Gene Product Structure
Dev. DisordersSkinCancer
G2P ↗
missense variantinframe deletioninframe insertion

RET-related renal agenesis

limited
ARLoss Of FunctionAbsent Gene Product
Skin
G2P ↗

RET-related pheochromocytoma

definitive
ADGain Of FunctionAltered Gene Product Structure
Skin
G2P ↗

RET-related medullary thyroid carcinoma

definitive
ADUndeterminedUncertain
SkinCancer
G2P ↗

Gene2Phenotype curations · DECIPHER consortium patient cohort (public variants) · deciphergenomics.org

OMIM — Genotype-Phenotype Relationships

1 OMIM entry

RET PROTOONCOGENE; RET
MIM #164761 · *

{Hirschsprung disease, protection against}

MIM #142623

Molecular basis of disorder known

Autosomal dominant

{Hirschsprung disease, susceptibility to, 1}

MIM #142623

Molecular basis of disorder known

Autosomal dominant

Medullary thyroid carcinoma

MIM #155240

Molecular basis of disorder known

Autosomal dominant

Multiple endocrine neoplasia IIA

MIM #171400

Molecular basis of disorder known

Autosomal dominant

Multiple endocrine neoplasia IIB

MIM #162300

Molecular basis of disorder known

Autosomal dominant

Pheochromocytoma

MIM #171300

Molecular basis of disorder known

Autosomal dominant
📖
GeneReview available — RET
Authoritative clinical overview · NCBI Bookshelf · Recommended first read
Open GeneReview ↗
Clinical Literature
Landmark / reviewRecent case evidence
Key Publications
Landmark & review papers · by relevance
PubMed
Multiple endocrine neoplasia type 2: A review.
Mathiesen JS et al.·Semin Cancer Biol
2022Review
[Multiple Endocrine Neoplasia].
Uchino S et al.·Gan To Kagaku Ryoho
2019
RET and neuroendocrine tumors.
Ichihara M et al.·Cancer Lett
2004Review
Hereditary Medullary Thyroid Cancer: Genotype-Phenotype Correlation.
Frank-Raue K et al.·Recent Results Cancer Res
2025Review
Updates on the genetics of multiple endocrine neoplasia.
Sahakian N et al.·Ann Endocrinol (Paris)
2024Review
Genotype/phenotype correlations in multiple endocrine neoplasia type 2.
Castinetti F et al.·Endocr Relat Cancer
2024Review
Approach to the Patient: Hereditary Medullary Thyroid Carcinoma.
Shariq OA et al.·J Clin Endocrinol Metab
2025Review
Top 10 resultsSearch PubMed ↗

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

Lung Cancer

Survival Outcomes of Lung Cancer

RECRUITING
NCT03647098Hunan Province Tumor HospitalStarted 2018-08-01
Treatment
Hip Replacement in Osteoarthritis PatientsOsteoarthritis, Hip

Prehabilitation in Older People Undergoing Total Hip Replacement

NOT YET RECRUITING
NCT07048080Phase NAUniversidad de La FronteraStarted 2025-08
(P)rehabilitation Progresive Resistance Exercise TrainingPrehabilitation Group Deuterated WaterUsual Care Group Deuterated Water
NSCLC (Advanced Non-small Cell Lung Cancer)

QL1706 Combined With Chemotherapy in the Treatment of Immune-mediated NSCLC

RECRUITING
NCT07330596Phase PHASE2Anhui Provincial Cancer HospitalStarted 2025-10-30
QL1706 combined with ChemotherapyChemotherapy
RET-altered Non Small Cell Lung CancerRET-altered Solid Tumors

Study of RET Inhibitor TAS0953/HM06 in Patients With Advanced Solid Tumors With RET Gene Abnormalities

RECRUITING
NCT04683250Phase PHASE1, PHASE2Taiho Pharmaceutical Co., Ltd.Started 2020-12-16
TAS0953/HM06TAS0953/HM06
Non Small Cell Lung Cancer

A Study to Investigate the Family History of Cancer in Patients With Non-small Cell Lung Cancer (FAHIC - Lung).

RECRUITING
NCT06196424Fondazione Policlinico Universitario Campus Bio-MedicoStarted 2023-11-02
study questionnaire to investigate family history
Non-Small Cell Lung Cancer

Cabozantinib in Patients With RET Fusion-Positive Advanced Non-Small Cell Lung Cancer and Those With Other Genotypes: ROS1 or NTRK Fusions or Increased MET or AXL Activity

RECRUITING
NCT01639508Phase PHASE2Memorial Sloan Kettering Cancer CenterStarted 2012-07
Cabozantinib
Recurrent Lung Non-Small Cell CarcinomaStage IV Lung Cancer AJCC v8

Treatment for Advanced Non-small Cell Lung Cancer With Actionable Genomic Alterations After Targeted Treatment and Chemotherapy (An Expanded Lung-MAP Treatment Trial)

NOT YET RECRUITING
NCT07393555Phase PHASE2SWOG Cancer Research NetworkStarted 2026-08-07
Biospecimen CollectionComputed TomographyIvonescimab
Hematopoietic and Lymphatic System NeoplasmRecurrent EpendymomaRecurrent Ewing Sarcoma

Selpercatinib for the Treatment of Advanced Solid Tumors, Lymphomas, or Histiocytic Disorders With Activating RET Gene Alterations, a Pediatric MATCH Treatment Trial

ACTIVE NOT RECRUITING
NCT04320888Phase PHASE2National Cancer Institute (NCI)Started 2021-05-03
Computed TomographyMagnetic Resonance ImagingPositron Emission Tomography
Medulary Sponge Kidney

EXOME SEQUENCING IN MEDULLARY SPONGE KIDNEY

ACTIVE NOT RECRUITING
NCT06418230Hospices Civils de LyonStarted 2024-01-02
Medullary Thyroid Cancer (MTC)

A Prospective Cohort Study of Pralsetinib or Anlotinib in the Treatment of Locally Advanced and/or Metastatic Medullary Thyroid Carcinoma With RET Gene Mutations

NOT YET RECRUITING
NCT07048964Cancer Institute and Hospital, Chinese Academy of Medical SciencesStarted 2025-08-01
Carcinoma, Non-Small-Cell LungThyroid Neoplasms

A Study of LOXO-260 in Cancer Patients With a Change in a Particular Gene (RET) That Has Not Responded to Treatment

ACTIVE NOT RECRUITING
NCT05241834Phase PHASE1Eli Lilly and CompanyStarted 2022-03-23
LOXO-260
Non-small Cell Lung Cancer (NSCLC)

Sacituzumab Tirumotecan (MK-2870) Versus Chemotherapy in Previously Treated Advanced or Metastatic Nonsquamous Non-small Cell Lung Cancer (NSCLC) With EGFR Mutations or Other Genomic Alterations (MK-2870-004)

RECRUITING
NCT06074588Phase PHASE3Merck Sharp & Dohme LLCStarted 2023-11-12
Sacituzumab tirumotecanDocetaxelPemetrexed