PMC6662438_01
Contrast-enhanced CT scan images of right pericolonic mass: (a) axial and (b) coronal images demonstrate large partly exophytic lobulated mass (blue arrow) arising from the mid ascending colon with heterogeneously enhancement, consistent with mineralization or calcifications.
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fig1
No fatty component was reported (Figure 1).
(a) A low power image showing dedifferentiated liposarcoma with osseous differentiation involving the colonic wall (20X). (b) Dedifferentiated liposarcoma with osseous differentiation adjacent to well-differentiated liposarcoma (left) (20X). (c) Dedifferentiated liposarcoma with osseous differentiation and highly atypical cells (40X). (d) Areas of low-grade osteogenic differentiation with well-formed bone trabeculae and intervening spindle cells (40X). The insert shows high power image of the spindle cells with mild atypia (100X).
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fig2
In addition, small foci of mature-appearing adipose tissue containing rare atypical hyperchromatic stromal cells were detected adjacent to the high-grade sarcoma and at the retroperitoneal resection margin, raising consideration of a WDL (Figures 2 and 3).
(a) Cellular high-grade nonlipogenic sarcoma component composed of spindle and pleomorphic tumor cells (100X). (b) Focal transition into a well-differentiated liposarcoma with atypical stromal cells (100X). (c, d) Nonlipogenic sarcoma with osteoid matrix and highly atypical cells, resembling a high-grade osteosarcoma (100X). (e) Immunohistochemical staining for SATB2 is positive in osteoblastic cells and intervening atypical cells. (f) Areas of thick interconnected trabeculae of immature woven bone lacking osteoblastic rimming (40X).
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fig3
In addition, small foci of mature-appearing adipose tissue containing rare atypical hyperchromatic stromal cells were detected adjacent to the high-grade sarcoma and at the retroperitoneal resection margin, raising consideration of a WDL (Figures 2 and 3).