case_images: PMC6558603_01
case_images: Preoperative computertomography scan: axial (a), coronary (b), and 3D-reconstruction (c). The CT scan shows a calcificated mass without contact to the skeleton.
case_images: CRIOT2019-8532356.001.jpg
case_images: PMC6558603_01_CRIOT2019-8532356.001.jpg
case_images: fig1
case_images: Computer tomography of the cervical soft tissue showed a solid structure measuring approx. 24 x 21 x 33 mm, which seemed to be consistent with a calcification and which had no contact to adjacent bony structures (see Figure 1).
case_images: Display of the removed formalin-fixated specimen (37 x 22 x 22 mm, 12 g, presenting as a round, bony mass smoothly covered by a narrow lamella of connective tissue).
case_images: CRIOT2019-8532356.002.jpg
case_images: PMC6558603_01_CRIOT2019-8532356.002.jpg
case_images: fig2
case_images: The formalin-fixated specimen had size of 37 x 22 x 22 mm, and the weight was 12 g (see Figure 2).
case_images: Histopathological appearance of the lesion (haematoxylin and eosin staining, magnification 10x). Beneath the surrounding compact bone, the structure consists of cancellous bone tissue with regular medullary cavities.
case_images: CRIOT2019-8532356.003.jpg
case_images: PMC6558603_01_CRIOT2019-8532356.003.jpg
case_images: fig3
case_images: Beneath the surrounding compact bone, the structure consisted of cancellous bone tissue with regular medullary cavities enclosing yellow marrow, as well as differently sized areas of mature hematopoietic bone marrow, suggesting an ectopic formation of regularly differentiated bone tissue (see Figure 3).