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Hereditary Angioedema (HAE) is a rare autosomal dominant immunodeficiency disease with mutation in C1 inhibitor gene (Thirty-four patients with clinical phenotype of recurrent edematous attacks in face, upper and lower limbs, hands, and upper airway entered the study. Mutations inTwenty-three patients were diagnosed with HAE type I and 11 with HAE type II. Fourteen distinctive pathogenic variations including five frameshift (p.G217Vfs*, p.V454Gfs*18, p.S422Lfs*9, p.S36Ffs*21, p.L243Cfs*9), seven missense (p.A2V, p.G493R, p.V147E, p.G143R, p.L481P, p.P399H, p.R466C), one nonsense (p.R494*), and one splicing defect (C.51 + 2 T˃C), which three of these mutations were identified novel. However, no mutation was found in seven patients by Sanger sequencing and MLPA.Final diagnosis with mutation analysis of HAE after clinical evaluation and assessment of C1INH level and function can prevent potential risks and life-threatening manifestations of the disorder. In addition, genetic diagnosis can play a significant role in facilitating early diagnosis, pre-symptomatic diagnosis, early diagnosis of children, asymptomatic cases, and those patients who have the borderline biochemical results of C1-INH deficiency and/or C4.

Antecedentes: El angioedema hereditario se encuentra clasificado como una inmunodeficiencia primaria del sistema de complemento, debido a que se caracteriza por la ausencia de C1 inhibidor esterasa y por edema periódico de cualquier región del cuerpo que involucre tejido blando.Objetivo: Caracterizar a los pacientes adultos con diagnóstico de angioedema hereditario atendidos en el Servicio de Alergología Clínica del Hospital México de la Caja Costarricense del Seguro Social.Métodos: Estudio observacional retrospectivo. Los datos fueron obtenidos de los expedientes clínicos de los pacientes con diagnóstico confirmado de angioedema hereditario que estaban en seguimiento en el Servicio de Alergología del Hospital México, Caja Costarricense del Seguro Social.Resultados: Se identificaron 14 pacientes, siete hombres y siete mujeres. El promedio de edad fue de 36.6 años. Las manifestaciones clínicas más frecuentes fueron edema de extremidades y dolor abdominal. Solo tres pacientes en algún momento durante su evolución presentaron edema laríngeo; 12 casos correspondieron a angioedema hereditario tipo I.Conclusión: Las características clínicas de todos los casos documentados correspondieron con las descritas para angioedema, aunque solo algunos pacientes contaban con historial de manifestaciones graves.

Successful allogeneic cord blood transplantation in a patient with Evans syndrome leads to correction of hereditary angioedema type I as secondary effect

INTRODUCTION Icatibant, a first-in-class B2 bradykinin receptor antagonist, appears to have a favorable efficacy and safety profile for the treatment of acute attacks of hereditary angioedema in adults. AIMS To update the evidence and provide an overview of the available data on icatibant. EVIDENCE REVIEW Peer reviewed articles published and listed in Medline Search and published updated guidelines for the treatment of acute attacks in hereditary angioedema type I and II in adults were reviewed. The validity and quality of evidence were evaluated. PLACE IN THERAPY Clinical evidence for the treatment of acute hereditary angioedema attacks with icatibant is strong. Approximately 10% of the patients require a second dose. No serious adverse reactions have been reported. The only significant side effects consistently registered by 90% of patients are transient local pain, swelling, and erythema at the local injection site. CONCLUSION Subcutaneously administered 30 mg icatibant has been shown to be a safe and efficacious treatment in clinical trials. It is the only specific treatment authorized for self-administration by the subcutaneous route offering increased patient independence.

Hereditary angioedema is a rare and potentially fatal autosomal dominant disorder characterised by unpredictable skin, gastrointestinal tract or respiratory tract oedema. Plasma-derived C1-esterase inhibitors are effective in the prophylaxis or treatment of hereditary angioedema type I and II attacks, but must be administered intravenously. This may be problematic in patients with venous access difficulties. Icatibant, a bradykinin B2-receptor antagonist, is administered subcutaneously. In July 2008 icatibant received approval for healthcare professional-administered treatment of hereditary angioedema attacks in adults. In 2011 it received European Medicines Agency and US Food and Drug Administration licences for patient-administered treatment of hereditary angioedema attacks. Given these approvals, and with the appropriate training, icatibant could provide the opportunity for patients to self-administer treatment. This is one of the first long-term follow-up reports of patients with hereditary angioedema using self-administered icatibant. During follow-up, icatibant remained effective and patient satisfaction was high.

Hereditary angioedema is a rare autosomal dominant inherited disease which is characterized by an episodic, self-limiting increase in vascular permeability. Symptoms commonly involve in nonpitting, nonpruritic skin swellings. We present a case of hereditary angioedema. The patinets complained of a recurrent abdominal pain without accompanying skin swelling whose diagnosis was delayed nearly 20 years and accepted an unnecessary surgery. According to the decreased serum C1-inhibitor and C4 concentration, the patient was finally diagnosed with hereditary angioedema type I. After treatment with danazole, the patient reported a significant decrease in the frequency of attacks and the severity of pain. HAE is a rare cause of abdominal pain, however it needs to be taken as one of the differential diagnosis of various acute abdomens in order to avoid unnecessary surgeries.