PMC1298342_01
Computed tomography scan showing a mass in the right iliac fossa region.
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F1
Computed tomography scan demonstrated an unexplained right iliac fossa density, which could represent a caecal or pericaecal abnormality (figure 1).
Macroscopic appearance of the tumour showing lobules of fatty tissue with bands and nodules of firm white tissue.
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F2
The cut surface showed lobules of fatty tissue with bands and nodules of firm white tissue with a whorled appearance (figure 2).
Nodules of smooth muscle fibres admixed with mature adipose tissue. (Haematoxylin and eosin staining (x40) - Inset x200).
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F3
Microscopic examination (figure 3) showed a lesion composed of lobules of mature fatty tissue harbouring multiple variable sized nodules of smooth muscle fibres.
Immunostaining shows the spindle cells express smooth muscle actin (x40) - Inset (x200).
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F4
The spindle cells were positive for smooth muscle actin and desmin and negative for CD34 and CD117 (figure 4).