A 30 year old man presented with a mass in the inner thigh. MRI disclosed an enhancing, heterogeneous mass in the thigh, abutting the femur. Open biopsy was performed. Can you diagnose these images?

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Malignant small round cell tumor. Dd. PNET/EXTRASKELETAL EWINGS RHABDOMYOSARCOMA NHL. Neuroblastoma Small cell carcinoma

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Fig1 : HP image of Malignant SRCT. Fig2 : Delicate plexiform Vasculature with variable sized adipocytic cells & loose myxoid stroma with stellate cells. Fig 3 : Gross image : Large Reddish tinted, myxoid , yellowish lipomatous tumour. Impression : Summarising all : Myxoid Round cell Variant of Liposarcoma.

By the MRI look like a rhabdomyosarcoma in adductor magnus What does the pathologist and radiologist say?

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Soft tissue tumour - Alveolar Rhabdomyosarcoma However, IHC for needful.

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Malignant round Cell tumour? Rhabdomyosarcoma/PNET/NHL etc

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Rhabdomyosacoma. Extraskeletal Ewing's.

Malignant small round cell tumour of soft tissue having mixed inflammatory infiltrate in background invading bone IHC needs to be done

small blue round cell tumour

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Malignant small round cell tumor.

Malignant round cell tumor RMS PNET NHL

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