Fig. 37.

Tumour. Solitary osteochondroma in an asymptomatic paediatric patient. a Coronal conventional sonogram obtained over the medial aspect of the proximal tibia in a paediatric patient with a suspicion of pes anserinus tendinitis. b, c A-P (b) and L-L (c) standard radiographs obtained after US. US discloses a focal bulging (large white arrow) of the cortical bone contour just distal to the growing cartilage of the proximal tibia (small white arrow). Note regular thick cartilage cap (white arrowheads). The US appearance is that of an osteochondroma. Standard radiographs confirm the US findings