Thoracic outlet syndrome arising from an extrapleural lipoma

Abstract

Thoracic outlet syndrome refers to a multitude of signs and symptoms in the upper limb resulting from compression of the neurovascular bundle within the interscalene triangle. It is a complex clinical entity to diagnose on imaging, given its transient and postural nature, which is not often appreciable on nondynamic imaging. Here we describe an uncommon presentation of thoracic outlet syndrome resulting from an extrapleural lipoma and outline its multimodality-based investigation and management.