An 8-year-old girl presented with a 6-month history of slowly growing mass on the volar aspect of the right middle finger. Following are the preoperative clinical images showing the tumour mass. A magnetic resonance imaging showed an enhancing lesion that is adherent to the flexor sheath.

What can be the probable diagnosis for this patient? *This image-based case is from Docplexus editorial team for educative purpose only Source: Cases in Orthopedics Stay connected, the answer will be posted in 48 hrs