Proteus syndrome (PS) is a rare sporadic disorder with postnatal asymmetric overgrowth from any of the three germinal layers. The tissue overgrowth may present at birth but becomes more conspicuous with the progression of age. Though it apparently can affect any tissue. it commonly involves skin. https://www.roneverhart.com/Mizuno-Prospect-GXC105-Youth-Catcher-s-Mitt/