Adventitial bursitis of the dorsal foot presenting as soft tissue masses in patients with autism spectrum disorder

Autism spectrum disorder (ASD) is an increasingly common neurodevelopmental disorder associated with impairments in postural control and repetitive patterns of behavior. Here, we describe two cases of adventitial bursitis of the dorsolateral feet in patients with ASD presenting as mass-like lesions. Both patients habitually sat in the W-position and were treated with ultrasound-guided aspirations with immediate relief of symptoms.