PMC9849586_01
Preoperative imagological data. (A,B) AP and Lateral x-ray before operation show a well-demarcated and lytic lesion in the posterior talus. (C-E) Preoperative CT images show a lesion. (F-H) Preoperative MRI images show a lesion with no cortical and articular surface breakthrough, measuring 2.5*2.2*2.2 cm.
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F1
Preoperative MRI images showed a lesion with no cortical and articular surface breakage, measuring 2.5*2.2*2.2 cm (Figure 1).
Histological image. Histological examination shows chondroblastoma cells and foci of the eosinophilic chondroid matrix. The immunohistochemical results show KI67(5% +), H3F3A(-), Kp1(+), CD163(partial +), H3F3B(+), P16(partial +), P63(partial +), and SATB2(+). The findings are consistent with chondroblastoma. (A) Low-power view (hematoxylin and eosin stain, origin magnification x40). (B) High-power view (hematoxylin and eosin stain, origin magnification x200).
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F2
An x-ray-guided punch biopsy was performed and both histopathology and immunohistochemical results confirmed the diagnosis of chondroblastoma (Figure 2).
Intraoperative photographs (posterior ankle arthroscopy). P, Proximal; D, Distal; M, Medial; L, Lateral. (A) The lesion is located anterior to the posterior intermalleolar ligament. (B) Parts of the cartilage are removed to disclose the lesion. (C) Surgical debridement of the lesion followed by curettage. (D) Healthy cancellous bone after curettage. (E) Microfracture. (F) "Dry" arthroscopic view showing the cavity. (G) Allograft bone graft. (H) A photograph after the completion of implantation of allograft bone. (I) PRP-FG (platelet rich-plasma-fibrin glue) was injected.
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F3
The conditions are described in Figure 3.
One-year postoperative CT images showing good bone remodeling and osteointegration with no tumor recurrence.
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F4
One-year postoperative CT images showed good bone remodeling and osteointegration with no tumor recurrence (Figure 4).