title: Angiogenesis and expression of estrogen and progesterone receptors as predictive factors for recurrence of meningioma.
abstract: Meningiomas are benign tumors, with low rate of recurrence after surgery. The most important factor predicting recurrence is the extent of surgical resection; other factors have been studied with conflicting results. Angiogenesis, an important substratum for growth and spread of neoplasic cells, and the expression of estrogen and progesterone receptors (ER, PR), could play a role in the recurrence of meningioma. We evaluated 42 patients with meningioma diagnosis (confirmed by histopathology) treated exclusively by surgery between January 1995 and December 1999, and compared the recurring and non-recurring groups after a ten-year follow-up period. Recurrence was associated with several factors including vascular density (VD), cell proliferation index (CPI), ER, PR, and cyclin E (CE) tissue expression, as evaluated by immunohistochemistry. Complete surgical resection was achieved in 41% of patients. Recurrence of meningioma was found in 17 patients (40%). Median + or - standard deviation (SD) of recurrence time was 32 + or - 5 months. When recurrence versus no recurrence was compared, mean + or - SD of VD and CPI were 9 + or - 3.6 and 607.6 + or - 233 (40x/10 fields) respectively. Tissue expression was positive for ER, PR, and CE in 28, 62 and 91% of patients, respectively. The sole significant recurrence-associated factors were extent of resection (P = 0.003) and VD (P = 0.004). ER, PR, and CE-tissue expression were not statistically significant. The most important factor associated with meningioma relapse was vascular density, independently of hormonal status and extent of surgical resection. Patients with a high risk of recurrence could benefit from additional treatment.
authors.affiliation: Neuroimmunology Unit, Instituto Nacional de Neurologia y Neurocirugia, Insurgentes Sur 3877, Col. La Fama, Tlalpan 14269, Mexico City, Mexico.
authors.forename: Patricia
authors.initials: P
authors.lastname: Guevara
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Escobar-Arriaga
authors.forename: David
authors.initials: D
authors.lastname: Saavedra-Perez
authors.forename: Abelardo
authors.initials: A
authors.lastname: Martinez-Rumayor
authors.forename: Diana
authors.initials: D
authors.lastname: Flores-Estrada
authors.forename: Daniel
authors.initials: D
authors.lastname: Rembao
authors.forename: Alejandra
authors.initials: A
authors.lastname: Calderon
authors.forename: Julio
authors.initials: J
authors.lastname: Sotelo
authors.forename: Oscar
authors.initials: O
authors.lastname: Arrieta
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D015331:Cohort Studies; D019927:Cyclin E / Q000378:metabolism; D005260:Female; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000150:complications / Q000378:metabolism* / Q000473:pathology; D008579:Meningioma / Q000150:complications / Q000378:metabolism* / Q000473:pathology; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis*; D009389:Neovascularization, Pathologic / Q000209:etiology*; D011960:Receptors, Estrogen / Q000378:metabolism*; D011980:Receptors, Progesterone / Q000378:metabolism*; D012189:Retrospective Studies
chemical_list: D019927:Cyclin E; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone