title: [Hereditary angioedema: clinical and laboratory aspects of 7 cases].
abstract: Hereditary angioedema is caused by a defect in C1 inhibitor activity (C1INH). Its occurrence is rare and it is associated with an autosomal dominant mode of inheritance. We describe seven patients (4M:3F), age from 12 to 50 years old, who are affected by hereditary angioedema; four of them belong to the same family. The main clinical manifestations were: angioedema of face, hands and feet (6/7) and abdominal pain (2/7). No triggering factors were associated with symptoms in 4/7 patients and trauma (2/7) and menses (1/7) were reported in the other three ones. One patient was submitted to laparotomy for partial intestinal resection, before diagnosis. Laboratory complement analysis revealed the absence of hemolytic function of complement, reduced C4 (6/7) and low C1INH levels. All patients received Danazol (100 mg/day) with clinical control. Hereditary angioedema has to be considered in the differential diagnosis of angioedema, since an early diagnosis of this immunodeficiency, leading to specific treatment in order to decrease the complications.
authors.affiliation: Depto. de Pediatria, Faculdade de Medicina, Universidade de São Paulo, Brasil.
authors.forename: A P
authors.initials: AP
authors.lastname: Moschione-Castro
authors.forename: J
authors.initials: J
authors.lastname: Croce
authors.forename: C L
authors.initials: CL
authors.lastname: Diogo
authors.forename: C M
authors.initials: CM
authors.lastname: Jacob
authors.forename: A C
authors.initials: AC
authors.lastname: Pastorino
authors.forename: M
authors.initials: M
authors.lastname: Kirschfink
authors.forename: A S
authors.initials: AS
authors.lastname: Grumach
mesh_terms: D000328:Adult; D000799:Angioedema / Q000097:blood / Q000175:diagnosis / Q000235:genetics*; D003174:Complement C1 Inactivator Proteins / Q000032:analysis; D003176:Complement C3 / Q000032:analysis; D003181:Complement C4 / Q000032:analysis; D015941:Complement Hemolytic Activity Assay; D003165:Complement System Proteins / Q000032:analysis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015985:Precipitating Factors
chemical_list: D003174:Complement C1 Inactivator Proteins; D003176:Complement C3; D003181:Complement C4; D003165:Complement System Proteins
vernacular_title: Angioedema hereditário: aspectos clínico-laboratoriais de sete casos.