Coexistence of meningioma and other intracranial benign tumors in non-neurofibromatosis type 2 patients:A case report and review of literature

BACKGROUND The coexistence of meningioma and other intracranial primary benign tumors is rare,especially in non-neurofibromatosis type 2,and there is limited guidance for the management of such patients.Here,we report a series of 5 patients with concomitant meningioma and other intracranial benign tumors,including subependymoma and pituitary adenoma.CASE SUMMARY Five non-neurofibromatosis type 2 patients with simultaneous occurrence of meningioma and other intracranial benign tumors were retrospectively reviewed.The patients had no history of previous irradiation.The clinical features,pre-and postoperative imaging,surgical procedure and pathological findings were extracted from electronic medical records.There were 4 female patients(80%)and 1 male patient(20%).The mean age was 42.8 years(range:29-52 years).The coexisting tumors included subependymoma in 1 case(20%)and pituitary adenoma in 4 cases(80%).The most common clinical symptom was headache(3/5,60%).Four patients(80%)underwent craniotomy.One patient(20%)underwent transsphenoidal surgery followed by transcranial operation.All tumor diagnoses were confirmed by histopathological examination.The mean follow-up was 38.8 mo(range:23-96 mo),and all 5 patients were in a stable condition at the last follow-up.CONCLUSION The simultaneous occurrence of meningioma and other intracranial benign tumors is a rare clinical event.Histological examination is necessary for the accurate diagnosis.Neurosurgeons should select the appropriate surgical strategy according to the clinical features of each patient,which may provide a more favorable prognosis for individual patients.

Expression and sub-cellular localization of leucine-rich repeats and immunoglobulin-like domains are related to antioxidant enzymes in human ependymoma and oligodendroglioma

The current study investigated correlations between the expression of leucine-rich repeats and immunoglobulin-like domain 1 （LRIG1） and antioxidant enzymes and related proteins, including manganese superoxide dismutase, glutamate cysteine ligase catalytic or regulatory subunit, thioredoxin and thioredoxin reductase, in both human ependymoma and oligodendroglioma. Results revealed that the cytoplasmic expression of LRIG1 was associated with expression of glutamate cysteine ligase catalytic subunit in the human ependymoma, while the nuclear expression of LRIG1 was associated with expression of thioredoxin reductase. In human oligodendroglioma, the cytoplasmic expression of LRIG1 was associated with expression of the glutamate cysteine ligase catalytic subunit. Both the nuclear and perinuclear expressions of LRIG1 were associated with expression of glutamate cysteine ligase regulatory subunit. These results indicated that several antioxidant enzymes and related proteins contributed to LRIG1 expression, and that these may participate in the antioxidation of the cells.