| Phenotype details |
Initially associated with HAE-nC1INH with recurrent swelling of the face, trunk, and extremities, with no identifiable trigger, worsening over time, occasionally accompanied by itching and wheals, not resolved by several months of oral antihistamines and diuretics. Prophylaxis with lanadelumab with no recurrence of symptoms. Identified in 2026 as factor 12 deficiency. |