20 year old female with a slow growing tender mass ( 3 cm in diameter) on the left
It was intimately bound to the underlying tendoaponeurotic structures. The overlying skin was not involved.
Radiological examination : A soft tissue mass without calcification. The underlying bone was not involved.
The tumour was enucleated and after postoperative radiotherapy a wide local excision was done.
The patient was symptomless 4 years after operation.
Gross: The cut
surface has a greyish-white appearance with brownish patches.
These cells have vesicular nuclei and prominent nucleoli. Which tumours show clear cell change?
Immunohistochemistry: S100 protein- Positive ; HMB45- Positive ; Smooth muscle actin- Negative
S100 protein is strongly positive.
Reticulin stain: Nested architecture with loose meshwork of reticulin fibres , which surround the individual nests of tumour cells .
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