Fig. 4From: Infantile type I pleuropulmonary blastoma presenting with dyspnea due to compression by pneumothorax and an occupying tumor: a case reportPathological findings. Immature blast cell-like mesenchymal cells and differentiated striated muscle cells under the epithelium of the cystic lesion are observed. Hematoxylin and eosin, original magnification ×100Back to article page