case_images: PMC6410423_01
case_images: Swelling of 5 x 9 cm over the lateral aspect of the left ankle joint with discolored skin and no signs of inflammation.
case_images: CRIOR2019-9617184.001.jpg
case_images: PMC6410423_01_CRIOR2019-9617184.001.jpg
case_images: fig1
case_images: On clinical examination, there was a 5 x 9 cm swelling over the lateral aspect of the left ankle joint (Figure 1), which was well defined, nonmobile, firm to hard in consistency, and nontender.
case_images: Anteroposterior X-ray of the left ankle joint showing a radiopaque mass with dense homogenous calcification over the lateral aspect of the ankle joint.
case_images: CRIOR2019-9617184.002.jpg
case_images: PMC6410423_01_CRIOR2019-9617184.002.jpg
case_images: fig2
case_images: The ankle joint appeared normal, and there were no pressure erosions over the lower end of the fibula (Figure 2).
case_images: FNAC (Pap stain x40) showing foci of calcium deposits with numerous highly refractile rhomboid-shaped crystals.
case_images: CRIOR2019-9617184.003.jpg
case_images: PMC6410423_01_CRIOR2019-9617184.003.jpg
case_images: fig3
case_images: Considering the benign nature of the condition, a FNAC was done, and smears showed dense deposits of calcium with numerous refractile radiating rhomboid-shaped crystals which were seen against amorphous material (Figure 3).
case_images: Ovoid-shaped mass measuring 7 x 5.5 x 4 cm reddish white in color after surgical removal.
case_images: CRIOR2019-9617184.004.jpg
case_images: PMC6410423_01_CRIOR2019-9617184.004.jpg
case_images: fig4
case_images: Intraoperatively, an ovoid-shaped mass, reddish white in color and measuring 7 x 5.5 x 4 cm, was noted underneath the peroneal tendon overlying the capsule (Figure 4).
case_images: Biopsy: (a) (H&E stain x200) large globular deposits of calcium with rhomboid-shaped crystals surrounded by mild inflammatory reaction; (b) (H&E stain x400) CPPD crystals along with minimal lymphocytic infiltration and foci of calcification.
case_images: CRIOR2019-9617184.005.jpg
case_images: PMC6410423_01_CRIOR2019-9617184.005.jpg
case_images: fig5
case_images: The mass obtained was subjected to a histopathological examination, which confirmed the FNAC findings and showed large areas of calcium deposition with plenty of rhomboid-shaped refractile crystals (Figure 5).