The PVNS included irregular and nodular or diffused synovial proliferation, with low signal areas consistent both on T1WI and T2WI of hemosiderin deposition.

• PVNS主要表现为滑膜不规则结节状增生或弥漫性增生，增生的滑膜和结节内沉着含铁血黄素（T1WI、T2WI双低信号）。