case_images: PMC3583030_01
case_images: CT-scan three years preoperative. The corticalis is
  preserved. Within the lesion pseudo-trabeculation is visible.
case_images: TOORTHJ-7-40_F1.jpg
case_images: PMC3583030_01_TOORTHJ-7-40_F1.jpg
case_images: F1
case_images: A CT-scan and MRI-scan were performed and revealed a bone cyst with sclerotic borders without destruction of the cortical bone (Figs. 1, 2).
case_images: T1-weighted MRI three years preoperative. Note that the
  lesion presents with low signal intensity and no infiltration of the
  surrounding tissue.
case_images: TOORTHJ-7-40_F2.jpg
case_images: PMC3583030_01_TOORTHJ-7-40_F2.jpg
case_images: F2
case_images: A CT-scan and MRI-scan were performed and revealed a bone cyst with sclerotic borders without destruction of the cortical bone (Figs. 1, 2).
case_images: CT-scan 2 weeks before the operation. There is cortical breakthrough of the tumor. The size of the lesion has slightly increased in
  comparison the previous CT-scan.
case_images: TOORTHJ-7-40_F3.jpg
case_images: PMC3583030_01_TOORTHJ-7-40_F3.jpg
case_images: F3
case_images: However, no cortical breakthrough was present (Fig. 3).
case_images: Histological examination of biopsy shows abundant collagen fibers, strong positive labelling for the adhesion protein beta-Catenin,
  weak positive labelling for S-100 and almost no positive stain for the proliferation marker Ki67.
case_images: TOORTHJ-7-40_F4.jpg
case_images: PMC3583030_01_TOORTHJ-7-40_F4.jpg
case_images: F4
case_images: Morphology and immunophenotype were consistent with either aggressive fibromatosis or desmoplastic fibroma, both of which express beta-catenin (Fig. 4).
case_images: Intraoperative photograph showing the removed tissue. It
  has a beige color and hard as well as soft areas of consistency.
case_images: TOORTHJ-7-40_F5.jpg
case_images: PMC3583030_01_TOORTHJ-7-40_F5.jpg
case_images: F5
case_images: The tissue was beige in color with hard and soft areas of consistency (Fig. 5).
case_images: CT-scan 6 months after the operation. No residual tumor is
  present.
case_images: TOORTHJ-7-40_F6.jpg
case_images: PMC3583030_01_TOORTHJ-7-40_F6.jpg
case_images: F6
case_images: Postoperative follow-up examinations as well as CT-scans 6 and 18 months after surgery showed good integration of the graft (Figs. 6, 7).
case_images: CT-scan 18 months after the operation. The bone graft is
  well integrated in pelvic bone. No discontinuity of the cortical
  bone. No recurrence of the tumor is present.
case_images: TOORTHJ-7-40_F7.jpg
case_images: PMC3583030_01_TOORTHJ-7-40_F7.jpg
case_images: F7
case_images: Postoperative follow-up examinations as well as CT-scans 6 and 18 months after surgery showed good integration of the graft (Figs. 6, 7).