Table 1. Reported cases of diagnosed World Health Organization (WHO) grade I meningiomas with associated extracranial metastasis.

IMRT: intensity-modulated radiotherapy; EBRT: external beam radiation therapy.

Reference	Article Type	Age (years)/ Sex	Initial Presentation	Initial Location	WHO grade	Metastasis	Treatment	Outcome
Woo et al., 2019 [11]	Case Report	37/F	2-month history of progressive blurred vision and papilledema	L frontal lobe, parasagittal	I	R lower lung lobe	Gross total resection, radiotherapy (50.4 Gy)	Disease remission
Erman et al., 2005 [12]	Case Report	34/F	Not specified	L frontal lobe, parasagittal	I, II, III	Both lungs	Gross total resection, radiotherapy, chemotherapy	Patient died in Intensive Care Unit as a result of respiratory failure
Lee et al., 2009 [13]	Case Report	68/M	2-week history of L sided motor weakness and dysarthria	R lateral ventricle	I, II (recurrence)	Spine: T5, T10, L1, L3, L4, S1, S2, T7, Retroperitoneum, both lungs	Gross total resection, radiation therapy, Decompressive total laminectomy of T7 and subtotal T6 with removal of the epidural mass	Died several months later
Moubayed et al., 2011 [14]	Case Report	58/M	Not specified	L frontal lobe	I, III	Cervical lymph nodes	Lymph node excision, 2 radiation treatments, 60 Gy IMRT then 70 Gy IMRT to ipsilateral neck	Disease remission
Azene et al., 2016 [15]	Case Report	69/F	Not specified	R frontal lobe, parafalcine	I, II	R iliac wing	Two near total resection, 34 fractions EBRT	Not specified