mold behind drywall near plumbing 13

https://wiki-canyon.win/index.php/Gateway_Water_%26_Mold:_Uncovering_Hidden_Mold_Behind_Drywall_After_a_Plumbing_Leak

We noticed a musty smell near the bathroom wall and when we opened it up, there was a patch of black mold spreading behind the drywall right where the plumbing runs. It was caused by a slow leak from a pipe fitting that must have been going on for months, completely hidden inside the wall.