Pulmonary blastoma with fatal hypercalcemia.

We describe a 50-year-old, previously healthy male with metastatic pulmonary blastoma associated with hypercalcemic and hyperosmolar complications which caused his death after 5 days. The primary tumor consisted of epithelial [cytokeratin, beta-hCG CEA, neuron-specific enolase (NSE)-positive] and mesenchymal components (beta-hCG, vimentin, NSE-positive, while the metastases had only a mesenchymal component.