[Cold urticaria with risk of anaphylaxis treated with omalizumab. A case report].

BACKGROUND

Omalizumab, which is a monoclonal anti-IgE antibody, has recently been used as an option in the treatment of inducible urticaria.

CASE REPORT

We describe the case of a 46-year-old woman who was referred to the Department of Allergy and Immunology of "Hospital Civil de Guadalajara, Dr. Juan I. Menchaca" due to a history of hives, body itching, changes in the color of the skin after exposure to water, and chest tightness after the intake of cold beverages; therefore, she used to limit her outdoor activities and personal hygiene. We conducted challenge tests with heat, soaked towels, treadmill walks, and dermographism; which were negative. The ice cube test was positive. To establish the speed of wheal formation, we established intervals of exposure to cold of one, three, five, and ten minutes; a positive result was obtained from the third minute. Due to the poor response to the drug treatment and to measures to avoid the cold, as well as to the poor quality of life, the high risk of anaphylaxis, and the advent of winter season, omalizumab was administered at monthly doses of 150 mg during the winter season. After the first dose, there were no reports of episodes of hives in areas exposed to cold; the ice cube test was negative before the second dose and in the following months, and the patient was able to ingest cold beverages and cold food. There were no adverse reactions that could be attributable to the use of omalizumab. Three years after the first dose, the patient was still asymptomatic.

CONCLUSION

The described case is one of the first cases of cold urticaria with risk of anaphylaxis with a positive response to omalizumab, which was reflected in symptom control and the improvement in the quality of life.