Neoplasm, neoplastic: arachnoid

Site	Malignant, Primary	Malignant, Secondary	Ca in situ	Benign	Uncertain Behavior	Unspecified Behavior
—	C70.9	C79.49	—	D32.9	D42.9	D49.7
cerebral	C70.0	C79.32	—	D32.0	D42.0	D49.7
spinal	C70.1	C79.49	—	D32.1	D42.1	D49.7