Here we report a case of a 55 years old lady who underwent hemithyroidectomy 15 years back presented with abdominal mass diagnosed with C T Scan As retroperitoneal soft tissue sarcoma. During surgery it was found to be a renal mass. We did a nephrectomy .Histopathology showed that thyroid follicular cells in a background of colloid.IHC showed that positivity for thyroid transcription factor (TTF), consistent with follicular thyroid carcinoma