Patellar
tumors are rare and are usually benign as opposed to malignant tumours. The most frequent benign lesions of
patella are
giant cell tumor (common in
adults),
chondroblastoma and
osteoid osteoma. A solitary
exostosis is the most common benign
bone tumor which occurs around the
growth plate of long
bones. The
treatment of choice is extra periosteal resection of
exostosis and ensuring complete removal of cartilaginous cap. Indications of
surgery are when the
exostosis is interfering or disturbing the
growth of
extremity, malignant transformation, presence of
bone erosion, neurovascular compression, interference with
joint motion,
bursitis, fracture through the stalk and cosmesis. We
report a rare case in an
adult patient with an extra-articular skeletal
osteochondroma of the
patella located antero - superiorly which presented as an enlarged bursa and a bony swelling over
knee joint.