PMC2913843_01
(a) A solid mass in the right iliac fossa not attached to the bowel wall, (b), (c) well-differentiated liposarcoma infiltrating the submucosa, (d), (e), and (f) dedifferentiated component infiltrating the small bowel, and (g), (h) well-differentiated liposarcoma at the small bowel resection margins.
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The CT scan showed a solid mass not obviously attached to the small or large bowel and had a possible fatty component at the edge (Figure 1(a)). The well-differentiated areas were represented by adipose tissue in which atypical adipocytes and lipoblasts were easily identifiable (Figures 1(b) and 1(c)). The dedifferentiated areas were represented by high-grade pleomorphic and spindle cell sarcoma that expressed diffuse strong SMA and desmin positivity indicating divergent myogenic differentiation (Figures 1(d), 1(e), and 1(f)). Furthermore well-differentiated liposarcoma was present at the resection margins (Figures 1(g) and 1(h)) despite these being at least 9 cms away from the macroscopic tumour.