| Nephroblastoma is an embryonal neoplasm derived from nephrogenic blastemal cells primarily occurring in children who are younger than 6 years. |
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| The blastemal cells are derived locally from the mesenchymal tissues of the stump, close to the site of amputation. |
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| Other morphology that this tumor may exhibit would be a predominantly papillary, microcystic, or blastemal growth pattern. |
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| The result is a movement of the transfected blastemal cells to more proximal regions in the intercalating regenerate. |
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| The smears were moderately cellular and included an admixture of the characteristic small ovoid blastemal elements and scattered spindled mesenchymal tumor cells. |
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| High power of the edge of the tumour shows osteoid with osteoblasts on the left and mitotically active blastemal cells at the centre. |
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| Pathologically, Classical Wilms' tumour has triphasic histology, with components of blastemal, epithelial, and stromal structures, as found in our case. |
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