1. Meningioma Metastatic to the Lung
Arun Adlakha, MD, Krishna Rao, MD, Harkiran Adlakha, MD, Arie Perry, MD, Thomas B. Crotty, MD, Bernd W. Scheithauer, MD, Jay H. Ryu, MD 
Mayo Clinic Proceedings 
Volume 74, Issue 11, Pages (November 1999)
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Copyright © 1999 Mayo Foundation for Medical Education and Research Terms and Conditions

2. Figure 1
Case 1. Tissue section from primary intracranial tumor. Note hypercellularity, high nuclear to cytoplasmic ratio, and formation of papillae with fibrovascular cores (hematoxylin-eosin, original magnification ×200).
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3. Figure 2
Case 2. Computed tomographic scan of the chest showing a nodular infiltrative process in the right midlung. Multiple small (5 mm) indeterminate rounded nodular opacities are also seen in both lungs.
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4. Figure 3
Case 2. Tissue section from one of the incidental psammomatous meningiomas from the resected lung. Note benign morphologic appearance (hematoxylin-eosin, original magnification ×25).
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5. Figure 4
Case 3. Histology of the initial resected intracranial tumor. Note the “sheeting” architecture, rhabdoid cytology (eccentric nuclei and abundant eosinophilic cytoplasm), and frequent mitoses sufficient for a designation of atypical meningioma (hematoxylin-eosin, original magnification ×400).
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6. Figure 5
Case 3. Computed tomographic scan of the chest showing multiple small bilateral pulmonary nodules.
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