# Left Upper Extremity Pain, Right Coronary Artery Culprit: A Puzzling Path to Aneurysm Discovery

## TL;DR

This paper presents a rare case of a giant coronary artery aneurysm in an adult, highlighting its unusual presentation and potential complications.

## Contribution

The novelty lies in reporting a rare adult case of GCA with a focus on its clinical presentation and management.

## Key findings

- Giant coronary artery aneurysm (GCA) is rare and often asymptomatic.
- GCAs can lead to severe complications like myocardial infarction or sudden death.
- The case involved a GCA in the right coronary artery in an adult patient.

## Abstract

Giant coronary artery aneurysm (GCA) is a rare disease afflicting 0.2% of the population. It is primarily attributed to atherosclerosis in adults and Kawasaki disease in children. Other uncommon etiologies include Takayasu arteritis and post-percutaneous coronary intervention.1,2 GCA lacks a universally accepted definition, with proposed criteria including a diameter exceeding 2 cm, 5 cm, or four times the normal vessel size.3 While the majority of GCAs are asymptomatic, a subset of patients present with angina, myocardial infarction from embolization or compression, heart failure due to fistula formation, or even sudden death.1 We report a case of an adult harboring a GCA involving the right coronary artery.