raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:144

Lynch syndrome

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Adult
Status
active

A rare form of hereditary nonpolyposis colon cancer (HNPCC) characterized by predisposition to a wide variety of cancers, including neoplasms of the digestive tract, urinary tract, endometrium, ovary, brain, and prostate, as well as sebaceous skin tumors. LS-associated tumors are typically characterized by the presence of microsatellite instability (MSI) and loss of expression of MMR proteins in tumor tissue.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enLynch syndrome
frSyndrome de Lynch
deLynch-Syndrom
esSíndrome de Lynch
itSindrome di Lynch
nlSyndroom van Lynch
ptSíndrome Lynch
plZespół Lyncha
csLynchův syndrom
ukСиндром Лінча
zh林奇综合征
trLynch sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM120435Evalidated
OMIM609310BTNTvalidated
OMIM613244BTNTvalidated
OMIM614331BTNTvalidated
OMIM614337BTNTvalidated
OMIM614350BTNTvalidated
OMIM614385BTNTvalidated
ICD-10C18.0NTBTattributedvalidated
ICD-10C18.1NTBTattributedvalidated
ICD-10C18.2NTBTattributedvalidated
ICD-10C18.3NTBTattributedvalidated
ICD-112B90.YNTBTattributedvalidated
MONDO0005835Evalidated
MeSHD003123Evalidated
UMLSC4552100Evalidated
GARD9905Evalidated
MedDRA10051981Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

Codes that Orphanet moved or referred to this one:

4

Genes

9 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
KRASBiomarker tested inAssessedHGNC:6407ENSG0000013370319007012p12.1KRAS proto-oncogene, GTPase19731079[PMID]
PIK3CABiomarker tested inAssessedHGNC:8975ENSG000001218791718343q26.32phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha19731079[PMID]
PMS1Candidate gene tested inNot yet assessedHGNC:9121ENSG000000649336002582q32.2PMS1 homolog 1, mismatch repair system component
TGFBR2Candidate gene tested inNot yet assessedHGNC:11773ENSG000001635131901823p24.1transforming growth factor beta receptor 2
EPCAMDisease-causing germline mutation(s) inAssessedHGNC:11529ENSG000001198881855352p21epithelial cell adhesion molecule21769135[PMID]_23938213[PMID]_20301390[PMID]
MLH1Disease-causing germline mutation(s) inAssessedHGNC:7127ENSG000000762421204363p22.2mutL homolog 123100212[PMID]_26149658[PMID]_20301390[PMID]
MSH2Disease-causing germline mutation(s) inAssessedHGNC:7325ENSG000000950026093092p21-p16.3mutS homolog 222234272[PMID]_26076155[PMID]_20301390[PMID]
MSH6Disease-causing germline mutation(s) inAssessedHGNC:7329ENSG000001160626006782p16.3mutS homolog 625318681[PMID]_20301390[PMID]
PMS2Disease-causing germline mutation(s) inAssessedHGNC:9122ENSG000001225126002597p22.1PMS1 homolog 2, mismatch repair system component18602922[PMID]_20301390[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyValidatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

62 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002027Abdominal pain
HP:0009720Adenoma sebaceum
HP:0002019Constipation
HP:0012378Fatigue
HP:0002239Gastrointestinal hemorrhage
HP:0012174Glioblastoma multiforme
HP:0002024Malabsorption
HP:0008069Neoplasm of the skin
HP:0001824Weight loss
Frequent (79-30%)
HP:0000739Anxiety
HP:0007018Attention deficit hyperactivity disorder
HP:0000708Atypical behavior
HP:0003003Colon cancer
HP:0100613Death in early adulthood
HP:0001522Death in infancy
HP:0000716Depression
HP:0001276Hypertonia
HP:0001252Hypotonia
HP:0002516Increased intracranial pressure
HP:0000737Irritability
HP:0002076Migraine
HP:0002017Nausea and vomiting
HP:0100743Neoplasm of the rectum
HP:0006753Neoplasm of the stomach
HP:0001250Seizure
Occasional (29-5%)
HP:0007256Abnormal pyramidal sign
HP:0002167Abnormality of speech or vocalization
HP:0010524Agnosia
HP:0100576Amaurosis fugax
HP:0002671Basal cell carcinoma
HP:0100835Benign neoplasm of the central nervous system
HP:0003002Breast carcinoma
HP:0100571Cardiac diverticulum
HP:0002376Developmental regression
HP:0001260Dysarthria
HP:0010526Dysgraphia
HP:0100660Dyskinesia
HP:0012114Endometrial carcinoma
HP:0001371Flexion contracture
HP:0001288Gait disturbance
HP:0000738Hallucinations
HP:0004377Hematological neoplasm
HP:0004374Hemiplegia/hemiparesis
HP:0001402Hepatocellular carcinoma
HP:0200008Intestinal polyposis
HP:0012118Laryngeal carcinoma
HP:0006758Malignant genitourinary tract tumor
HP:0002354Memory impairment
HP:0002896Neoplasm of the liver
HP:0002894Neoplasm of the pancreas
HP:0010622Neoplasm of the skeletal system
HP:0100031Neoplasm of the thyroid gland
HP:0003006Neuroblastoma
HP:0100615Ovarian neoplasm
HP:0006725Pancreatic adenocarcinoma
HP:0003401Paresthesia
HP:0002893Pituitary adenoma
HP:0009726Renal neoplasm
HP:0100684Salivary gland neoplasm
HP:0010786Urinary tract neoplasm
HP:0001123Visual field defect
HP:0000505Visual impairment

Run the differential on the 9 obligate / very frequent terms

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Sources for this card