Patellar osteochondroma: case report

Abstract

The aim was to report on a rare case of patellar osteochondroma. A 60-year-old man presented a tumor on his left patella that had developed over a 10-year period, which is a rare occurrence, considering the patient's age and the site at which the tumor appeared. The clinical condition comprised mild pain and the presence of a mass, without limitation of flexion–extension or any neurovascular deficit. The tumor dimensions were 8 cm longitudinally × 6 cm transversally × 3 cm anteroposteriorly. It was hardened and was adhering to the patellar bone plane. On radiographs and tomographic scans, we observed areas of greater density corresponding to bone and other less dense areas that could correspond to slow-growing cartilage, with irregularities on the patellofemoral joint surface. Simple resection of the tumor was performed, and the anatomopathological examination confirmed that it was a patellar osteochondroma. Osteochondroma, or osteocartilaginous exostosis, includes a large proportion of the benign bone tumors. It results from cell alterations that trigger unregulated production of spongy bone. It is basically treated by means of surgical removal of the tumor mass. This is not essential, but is recommended in order to avoid lesions caused by contiguity and the risk of malignant transformation.

Rare retro-patellar unilateral multiple osteochondroma in patellar tendon: a case report

“…Patellar OC is rare and mostly affects the patellar bursa. Moraes et al (2014) reported a patellar OC measuring 8 × 6 × 3 cm anterior to the patella in a 60-year-old man who was painless and without limitation of flexion-extension in the knee joint (5). In the present case, rare retro-patellar OC was observed in the area of the patellar ligament.…”

“…These symptoms could be due to the inflammatory processes involved in the degeneration of dense connective tissue around the mass of exostoses in the lacunae of the patellar ligament. Studies show that OC is associated with good prognosis and low risk of metastasis, but due to the disturbance in the anatomical alignment of the knee joint, the masses are removed by radical resection and the patellar ligament is fixed and stabilized at the connection to the tibial tuberosity (5). In the report of Pandian et al (2016), in a 22-year-old man, bilateral OC masses in the patella and patellar ligament caused severe arthritis, chronic pain, edema, and impaired flexion-extension knee movements (8).…”

Rare retro‐patellar multiple osteochondromas in patellar tendon: A case report

“…However, due to the disturbance in the anatomical alignment of the knee joint, masses are typically removed by radical resection, and the patellar ligament is fixed and stabilized at the connection to the tibial tuberosity. 5 Pandian et al (2016) reported a case in which a 22-year-old man had bilateral OC masses in the patella and patellar ligament, causing severe arthritis, chronic pain, edema, and impaired flexion-extension knee movements. 8 In 15% of cases, the mass is surrounded by a calcified cartilage cap around the bony lacuna, and its thickness may even exceed 15 mm.…”

Osteochondroma of Patella: A Case Report

“…The relative indications are esthetic complications, which often give rise to post-operative skin scarring that is worse than the esthetic deformity itself; and pain, which may occur because of bursitis or after fracturing, depending on the patient's symptoms. [12] …”