Individuals with ficolin-3 deficiency have highly variable manifestations and a variable age of symptom onset. Some patients may show increased susceptibility to infection in the perinatal or neonatal period, whereas others may show autoimmune features as adults. Ficolin-3, also known as H-ficolin, can activate the lectin pathway of the complement system; deficiency may thus lead to defects in the complement system (summary by Munthe-Fog et al., 2009 and Michalski et al., 2015).
For a discussion of genetic heterogeneity of lectin complement activation pathway defects, see LCAPD1 (614372). [from
OMIM]