Fig. 3
From: Undiagnosed synovial hemangioma of the knee: a case report
Arthroscopic views of the mass. a and b Synovial hemangioma of the lateral side. The mass has a multilocular tumor. This mass clearly consists of blood vessels. c and d Synovial hemangioma of the medial side. The mass spread from the patellofemoral joint to the medial femorotibial joint