Preferred Label : Prothrombin deficiency, congenital;
Type : Phenotype, molecular basis known;
Alternative titles and symbols : HYPOPROTHROMBINEMIA;
Included titles and symbols : Dysprothrombinemia;
Description : Prothrombin deficiency is an extremely rare autosomal recessive bleeding disorder
characterized by low levels of circulating prothrombin; it affects about 1 in 2,000,000
individuals. There are 2 main types: type I deficiency, known as true prothrombin
deficiency or 'hypoprothrombinemia,' is defined as plasma levels of prothrombin being
less than 10% of normal with a concomitant decrease in activity. These patients have
severe bleeding from birth, including umbilical cord hemorrhage, hematomas, ecchymoses,
hematuria, mucosal bleeding, hemarthroses, intracranial bleeding, gastrointestinal
bleeding, and menorrhagia. Type II deficiency, known as 'dysprothrombinemia,' is characterized
by normal or low-normal synthesis of a dysfunctional protein. Bleeding symptoms are
more variable, depending on the amount of residual functional activity. Variant prothrombin
gene alleles can result in 'hypoprothrombinemia' or 'dysprothrombinemia,' and individuals
who are compound heterozygous for these 2 types of alleles have variable manifestations.
Heterozygous mutation carriers, who have plasma levels between 40 and 60% of normal,
are usually asymptomatic, but can show bleeding after tooth extraction or surgical
procedures (review by Lancellotti and De Cristofaro, 2009).;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the coagulation factor II gene (F2, 176930.0001);
Prefixed ID : #613679;
Origin ID : 613679;
UMLS CUI : C0272317;
Automatic exact mappings (from CISMeF team)
Currated CISMeF NLP mapping
DO Cross reference
Genes related to phenotype
HPO term(s)
ORDO concept(s)
Semantic type(s)
UMLS correspondences (same concept)