case_images: PMC4345263_01
case_images: Clinical aspect of the tumorous mass adjacent to the ankle joint.
case_images: CRIOR2015-320139.001.jpg
case_images: PMC4345263_01_CRIOR2015-320139.001.jpg
case_images: fig1
case_images: A 17-year-old male patient was referred to us because of a growing mass adjacent to the left posteromedial ankle (Figure 1).
case_images: Plain radiography, anteroposterior and mediolateral view of the ankle joint.
case_images: CRIOR2015-320139.002.jpg
case_images: PMC4345263_01_CRIOR2015-320139.002.jpg
case_images: fig2
case_images: Plain radiographs in anteroposterior and mediolateral projection of the ankle showed a polycyclic slightly condensed bone structure located dorsal to the tibiotalar joint (Figure 2).
case_images: Preoperative CT images, axial and sagittal planes of the ankle joint.
case_images: CRIOR2015-320139.003.jpg
case_images: PMC4345263_01_CRIOR2015-320139.003.jpg
case_images: fig3
case_images: Otherwise the ankle joint was intact (Figure 3).
case_images: (a) Intraoperative aspect, neurovascular bundle (posterior tibial artery/veins, tibial nerve) and retinaculum of flexor muscles. (b) Intraoperative aspect, preparation and isolation of neurovascular bundle. (c) Intraoperative aspect, capsulotomy over the osteochondral lesion. (d) Intraoperative aspect, excision of the SOC tumor masses.
case_images: CRIOR2015-320139.004.jpg
case_images: PMC4345263_01_CRIOR2015-320139.004.jpg
case_images: fig4
case_images: The patient underwent complete excision through a posteromedial arthrotomy of the tibiotalar joint (Figures 4(a)-4(d)).
case_images: (a) Macroscopical aspect of the 2 masses from the ankle joint. (b) Corresponding microscopical aspect (Van Gieson's stain, magnification 2.5x).
case_images: CRIOR2015-320139.005.jpg
case_images: PMC4345263_01_CRIOR2015-320139.005.jpg
case_images: fig5
case_images: Histological findings showed that the larger fragment was made of normal cancellous bone without increased osteoblastic or osteoclastic activity; there were normal adipocytes in the bone marrow; thin cartilaginous coverage was of normal appearance (Figure 5(b)).
case_images: Plain radiography, anteroposterior and mediolateral view of the ankle joint at follow-up.
case_images: CRIOR2015-320139.006.jpg
case_images: PMC4345263_01_CRIOR2015-320139.006.jpg
case_images: fig6
case_images: Plain radiography did not show any relapse of the lesion (Figure 6).
case_images: PMC4345263_02
case_images: Plain radiography, anteroposterior and mediolateral view of the knee joint.
case_images: CRIOR2015-320139.007.jpg
case_images: PMC4345263_02_CRIOR2015-320139.007.jpg
case_images: fig7
case_images: Plain radiographs showed a partially calcified intra-articular lesion in the Hoffa fat pad (Figure 7).
case_images: Preoperative MR images, sagittal plane T1- and T2-weighted images, of the knee joint.
case_images: CRIOR2015-320139.008.jpg
case_images: PMC4345263_02_CRIOR2015-320139.008.jpg
case_images: fig8
case_images: T2-weighted MR images, the masses were heterogeneously of high signal intensity (Figure 8).
case_images: Macroscopic aspect of the tumorous mass in Hoffa's fat pad.
case_images: CRIOR2015-320139.009.jpg
case_images: PMC4345263_02_CRIOR2015-320139.009.jpg
case_images: fig9
case_images: The patient underwent an open arthrotomy with resection of the mass. The specimen with a maximum diameter of 5 cm was examined pathologically (Figure 9).