Japan Organization of Occupational Health and Safety

Tumor-to-tumor metastasis of small cell carcinoma of presumed pulmonary origin to a sphenoid ridge meningioma: A diagnostic pitfall in preoperative systemic evaluation

Background: Tumor-to-tumor metastasis (TTM) to a meningioma is rare. Atypical meningioma-like lesion with systemic cancer risk factors warrants evaluation for metastatic disease before resection. Case Description: An 80-year-old man with a smoking history and pulmonary emphysema...