Abstract
Anomalous flexor digitorum superficialis muscles in the hand are an uncommon phenomenon,
and therefore present challenges in diagnosis and management. We report a case of
a 16-year-old girl presenting with a painful, slowly enlarging palmar swelling. The
swelling was investigated with ultrasound and magnetic resonance imaging, and was
found to be an anomalous muscle belly of the flexor digitorum superficialis muscle.
After careful consideration, multidisciplinary discussion, and thorough imaging, the
patient was treated successfully without surgical exploration or excision, in comparison
to previously reported cases. The patient was pain free and had no concerns at 8-month
follow-up, demonstrating the value of conservative management in these cases.
Keywords
flexor digitorum superficialis - anatomic variants - magnetic resonance imaging -
ultrasound
