Search for a rare disease

* (*) mandatory field

Other search option(s)

Suggest an update

(*) Required fields.


Only comments seeking to improve the quality and accuracy of information on the Orphanet website are accepted. For all other comments, please send your remarks via contact us. Only comments written in English can be processed.

Captcha image

Immunodeficiency due to MASP-2 deficiency

Disease definition

Immunodeficiency due to MASP-2 deficiency is a rare, genetic immunodeficiency due to a complement cascade protein anomaly characterized by low serum levels of MASP-2 and a variable susceptibility to bacterial infections (e.g. pulmonary tuberculosis, pneumococcal pneumonia, skin abscesses and sepsis), and autoimmune diseases (e.g. inflammatory lung disease, cystic fibrosis, systemic lupus erythematosus). In many cases it remains asymptomatic.


  • Synonym(s): -
  • Prevalence: <1 / 1 000 000
  • Inheritance: -
  • Age of onset: Adolescent
  • ICD-10: D84.1
  • OMIM: 613791
  • UMLS: C3151085
  • MeSH: -
  • GARD: -
  • MedDRA: -

Additional information

Further information on this disease

Specialised Social Services

The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.