# Stent-Assisted Coiling in a Nickel-Allergic Patient

## TL;DR

A woman with a nickel allergy successfully underwent a brain aneurysm treatment using a nickel-containing stent without allergic reactions.

## Contribution

Demonstrates safe use of nickel-containing stents in patients with confirmed nickel allergy.

## Key findings

- No hypersensitivity reactions occurred after using a nickel-containing stent in a nickel-allergic patient.
- The procedure was completed without neurological complications or need for allergy-suppressing medication.

## Abstract

We report the case of a woman in her fourth decade of life with a known nickel allergy. She visited the previous clinic complaining of a headache. Head MRI was performed, which showed a right internal carotid artery aneurysm, and she was referred to our hospital for further treatment. We planned treatment using coiling embolization with a balloon catheter because we were afraid of allergic reactions against the nickel device. However, recused stenting was done during the procedure to prevent coil migration. After the treatment, there were no post-procedure neurological complications or hypersensitivity reactions due to nickel allergy. No medication was given to suppress the hypersensitivity reaction. The patient was discharged from the hospital with no complications. This case demonstrates that nickel-containing stents can be safely used in selected patients with confirmed nickel allergy.