raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:749

Congenital prekallikrein deficiency

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

A rare genetic coagulation disorder characterized by the usually incidental laboratory finding of a prolonged activated partial thromboplastin time (aPTT) but normal prothrombin time, due to a deficiency of normal prekallikrein or the presence of nonfunctional prekallikrein. Most patients remain clinically asymptomatic, although an association with cardiovascular conditions (hypertension, myocardial infarction, other coronary artery diseases, and ischemic strokes) and venous thrombosis, as well as rare cases with increased bleeding tendency have been reported.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCongenital prekallikrein deficiency
frDéficit congénital en prékallicréine
dePräkallikrein-Mangel, kongenitaler
esDeficiencia congénita de precalicreína
itDeficit congenito di precallicreina
nlCongenitale prekallikreïnedeficiëntie
ptDeficiência de precalicreína congénita
plWrodzony Niedobór prekalikreiny
csVrozený deficit prekalikreinu
ukВроджений дефіцит прекалікреїну
zh先天性前激肽释放酶原缺乏症
trDoğumsal prekallikrein eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM612423Evalidated
ICD-10D68.8NTBTattributedvalidated
ICD-113B15NTBTindexvalidated
MONDO0012901Evalidated
MeSHC562725Evalidated
UMLSC0272339Evalidated
GARD4477Evalidated

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.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
KLKB1Disease-causing germline mutation(s) inAssessedHGNC:6371ENSG000001643442290004q35.2kallikrein B115461630[PMID]_20301226[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families80 casesWorldwideCase(s)ValidatedORPHANET
Point prevalence<1 / 1 000 000—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

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card