ABSTRACT
Objective To investigate the value of ADC histogram in the differential diagnosis of angiomatous meningioma (AM) and hemangiopericytoma (HPC)and to screen out the best diagnostic parameter.Methods The MRI data of 21 cases with AM and 22 cases with HPC confirmed by surgical pathology were analyzed retrospectively.The ROI were drawn on the maximum cross section of the tumor on ADC maps,and the ADC histogram analysis was performed using the software named Mazda.Then the histogram parameters were statistically analyzed to find out the statistically significant parameters between the two groups,and the ROC curve was drawn to evaluate their diagnostic efficacy.Results ADCvariance ,ADC1th and ADC10th had statistical significances between the two groups (P＝0.030,0.002 and 0.02 1 ). ADC1th had the best diagnostic efficacy among them,with the optimal cut-off value of 0.086×10－3 mm2/s,the AUC was 0.814(P＝0.003),and the sensitivity and specificity were 86.70%and 64.70%,respectively.ADCvariance took the second place,for the AUC was 0.725 (P＝0.030),and the sensitivity and specificity were 7 6.50%and 80.00%,respectively.Conclusion The ADC histogram is of great value in the differential diagnosis of AM and HPC,and the ADC1th is the most effective parameter.
ABSTRACT
BACKGROUND: Angiomatous meningioma is a rare histological subtype of meningioma. Therefore, this specific medical condition is rarely reviewed in the literature. In the present work, we report the clinical and radiological features with postoperative outcomes of angiomatous meningioma. METHODS: This retrospective study included the patients who were pathologically diagnosed with angiomatous meningioma after surgical resection between February 2010 and September 2015 in our institute. We analyzed the clinical data, radiological manifestation, treatment and prognosis of all patients. RESULTS: The 15 patients (5 males and 10 females) were diagnosed with angiomatous meningioma during the study period. The median age of patients at the time of surgery was 63 years (range: 40 to 80 years). According to Simpson classification, 7, 5, and 3 patients achieved Simpson grade I, II, and IV resection, respectively. In the follow-up period, recurrence was noted in one patient. Ten out of the 15 patients showed homogeneous enhancement. Two patients demonstrated cystic changes. There was no occurrence of calcification or hemorrhage in our patients. Characteristically, 14 out of 15 patients showed signal voids of vessels. Significant peritumoral edema was observed in the majority of tumors (67%). CONCLUSION: Angiomatous meningiomas are rare benign meningioma. Brain images of angiomatous meningioma usually demonstrate signal void signs and peritumoral edema. In the present study, angiomatous meningiomas showed good prognosis after surgical resection.
Subject(s)
Humans , Male , Brain , Brain Edema , Classification , Edema , Follow-Up Studies , Hemorrhage , Magnetic Resonance Imaging , Meningioma , Prognosis , Recurrence , Retrospective StudiesABSTRACT
Hemangiopericytoma (HPC) is a rare tumor that arises from pericapillary cells or pericytes of Zimmerman. In the central nervous system, it accounts for less than 1% of tumors, and spinal involvement is very rare. Meningeal hemangiopericytomas show morphological similarities with meningiomas particularly with angiomatous meningioma, where one needs to take the help of immunohistochemistry (IHC) to delineate HPC from meningioma. Here, we report a case of recurrent extradural HPC in a 16 year-old girl, who 5 years back had a pathological diagnosis of angiomatous meningioma, for D5-D6 lesion. On evaluation, magnetic resonance imaging (MRI) showed a large extradural tumor with a signifi cant cord compression involving D5-D6 body, pedicle and ribs. Excision of the lesion and spinal stabilization was performed. The histopathological examination and immunohistochemistry performed on tumor sections revealed features favoring HPC. To conclude, detailed IHC is helpful in avoiding misdiagnosis and in further management of the patient.
ABSTRACT
OBJETIVO: presentar un paciente con un meningioma quístico, hallazgo infrecuente en la práctica neuroquirúrgica. DESCRIPCIÓN: paciente de sexo femenino, de 66 años de edad, con antecedentes de salud, quien fue llevada al cuerpo de guardia por presentar convulsiones. El examen físico resultó negativo. Los hallazgos obtenidos en la tomografía simple y contrastada hicieron pensar en el diagnóstico de tumor cerebral primario, probable astrocitoma de bajo grado vs. hemangioblastoma, que por su localización parietal alta podría justificar el cuadro clínico de la paciente. INTERVENCIÓN: se realizó tratamiento quirúrgico, con posterior examen histopatológico, y se detectó un meningioma angiomatoso. CONCLUSIONES: los meningiomas quísticos constituyen un hallazgo infrecuente en la práctica neuroquirúrgica, no obstante, no se debe olvidar que existen varios signos imagenológicos que orientan al diagnóstico preoperatorio como la existencia del signo de la cola, la irrigación procedente de la carótida externa o la ubicación en sitios de asentamiento frecuente de meningiomas.
OBJECTIVE: the presentation of a patient with cystic meningioma an uncommon finding in the neurosurgical practice. DESCRIPTION: a female patient aged 66 with health history seen in emergency department due to convulsions. The physical examination was negative. The findings obtained in single and contrasted tomography to bring about the diagnosis of primary cerebral tumor, a low grade probable astrocytoma versus hemangioblastoma which due to its parietal location could to justify the clinical picture of the patient. INTERVENTION: surgical treatment with a subsequent histological-pathological examination detecting the presence of an angiomatous meningioma. CONCLUSIONS: the cystic meningiomas are a uncommon finding in the neurosurgical practice, however, we must to take into account the there are some imaging signs leading to the preoperative diagnosis as the presence of tail sign, the irrigation of the external carotid or the location in sites of frequent settlement of meningiomas.