raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:220460

Attenuated familial adenomatous polyposis

Synonyms: AFAP · APC-related AFAP · APC-related attenuated FAP · APC-related attenuated familial polyposis coli · Attenuated FAP · Attenuated familial polyposis coli

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

A mild form of familial adenomatous polyposis characterized by the presence of fewer than 100 adenomatous colonic polyps, a more proximal colonic location, a delayed age of colorectal cancer onset and a more limited expression of the extracolonic features.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAttenuated familial adenomatous polyposisAFAP · APC-related AFAP · APC-related attenuated FAP · APC-related attenuated familial polyposis coli · Attenuated FAP · Attenuated familial polyposis coli
frPolypose adénomateuse familiale atténuéePAF attenuée · PAF attenuée liée à APC · PAFA · PAFA liée à APC · Polypose rectocolique familiale atténuée · Polypose rectocolique familiale atténuée liée à APC
deAttenuierte familiäre adenomatöse PolyposisAPC-assoziierte attenuierte familiäre Polyposis coli · Attenuierte FAP · AFAP · APC-abhängige attenuierte FAP · APC-assoziierte Polyposis
esPoliposis adenomatosa familiar atenuadaPAF atenuada · PAF atenuada asociada a APC · PAFA · PAFA asociada a APC · Poliposis coli familiar atenuada · Poliposis coli familiar atenuada asociada a APC · Poliposis colónica familiar atenuada · Poliposis colónica familiar atenuada asociada a APC
itPoliposi adenomatosa familiare attenuataAFAP · FAP attenuata · Poliposi rettocolica familiare attenuata
nlGeattenueerde familiale adenomateuze polyposisAFAP · APC-gerelateerde AFAP · APC-gerelateerde geattenueerde FAP · APC-gerelateerde geattenueerde familiale polyposis coli · Geattenueerde FAP · Geattenueerde familiale polyposis coli
ptPolipose adenomatosa familiar atenuadaFAP atenuada APC-relacionada · Polipose colon familiar atenuada · Polipose do cólon atenuada familiar APC-relacionada · AFAP · AFAP APC-relacionada · FAP atenuada
plPostać poronna rodzinnej polipowatości gruczolakowatejAFAP · Poronna FAP · Postać poronna rodzinnej polipowatości jelita grubego
csAtenuovaná familiární adenomatózní polypózaAFAP · Atenuovaná FAP · Atenuovaná familiární polyposis coli
ukПослаблений сімейний аденоматозний поліпозAFAP · Послаблений сімейний поліпоз кишкової палички · Ослаблений ФАП
zh家族性腺瘤性息肉病轻型轻型家族性结肠息肉病
trZayıflatılmış ailesel adenomatöz polipozAFAP · Zayıflatılmış FAP · Zayıflatılmış ailesel polipoz koli

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM175100NTBTvalidated
ICD-10D12.6NTBTattributedvalidated
ICD-112B90.YNTBTindexvalidated
MONDO0016362Evalidated
MeSHC538265Evalidated
UMLSC2674616Evalidated
GARD8532Evalidated

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 (3):

No children.

Codes that Orphanet moved or referred to this one:

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
APCDisease-causing germline mutation(s) inAssessedHGNC:583ENSG000001349826117315q22.2APC regulator of Wnt signaling pathway17489848[PMID]
5

Prevalence and incidence

0 records

No prevalence record in this release.

6

HPO phenotypes

23 annotations · validated 2019-01-09
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0200063Colorectal polyposis
Frequent (79-30%)
HP:0005227Adenomatous colonic polyposis
HP:0003003Colon cancer
HP:0004783Duodenal polyposis
HP:0030255Large intestinal polyposis
HP:0004394Multiple gastric polyps
HP:0006753Neoplasm of the stomach
HP:0100896Rectal polyposis
Occasional (29-5%)
HP:0040276Adenocarcinoma of the colon
HP:0009592Astrocytoma
HP:0010614Fibroma
HP:0005562Multiple renal cysts
HP:0012740Papilloma
HP:0000854Thyroid adenoma
HP:0000131Uterine leiomyoma
Very rare (<4-1%)
HP:0008256Adrenocortical adenoma
HP:0006744Adrenocortical carcinoma
HP:0003002Breast carcinoma
HP:0002672Gastrointestinal carcinoma
HP:0002894Neoplasm of the pancreas
HP:0002895Papillary thyroid carcinoma
HP:0030434Pilomatrixoma
Excluded (0%)
HP:0007649Congenital hypertrophy of retinal pigment epithelium

Run the differential on the 1 obligate / very frequent terms

Annotation source: 27476653[PMID]_22976915[PMID]_17938238[PMID]_22525412[PMID]_19822006[PMID]_14902760[PMID]_8747580[PMID]_11156460[PMID]_18046442[PMID]_21209732[PMID]_15300576[PMID]

7

Sources for this card