L Liu1, Y Lu2, W Peng1, D Geng2, J Wen2, J Xiong3, L Zou3, B Yin4. 1. Department of radiology, Fudan University Shanghai Cancer Center, department of Oncology, Shanghai Medical College, Fudan University, 270 Dongan Rd, 200032 Shanghai, China. 2. Department of Radiology, Huashan Hospital, Fudan University, 12, Wulumuqi Rd. Middle, 200040 Shanghai, China. 3. Department of Pathology, Huashan Hospital, Fudan University, 12, Wulumuqi Rd. Middle, 200040 Shanghai, China. 4. Department of Radiology, Huashan Hospital, Fudan University, 12, Wulumuqi Rd. Middle, 200040 Shanghai, China. Electronic address: yinbo7@163.com.
Abstract
PURPOSE: This study was conducted to describe the imaging features of intracranial psammomatous meningioma (IPM). MATERIALS AND METHODS: Twenty-three patients with a histopathological diagnosis of IPM between January 2007 and August 2016 were retrospectively reviewed. Twenty-two patients underwent contrast-enhanced MRI scanning, and 16 underwent non-enhanced CT. RESULTS: A total of 23 adult patients (3 men, 20 women; mean age, 55.3±7.0 years) with 30 IPMs, including 3 patients with multiple IPMs, were recruited. Twenty tumours (66.7%) were located at the cerebral convexity. The mean size of the lesions was 2.42±0.92cm (range, 1.2-4.8cm). All tumours had a regular shape. On CT scans, 13 masses (13/22) were totally replaced with calcifications, and calcifications were observed in 21 cases (21/22) with higher density. There were 22 cases (22/30) of IPMs presenting adjacent hyperostosis, while 8 cases (8/30) presented no skull changes that were not close to the skull. Nearly half of the cases (14/29) showed mixed hypo- and hyperintensity on T2-weighted images and DWI. PTBE was present in 8 tumours and absent in the other 22, among which only 4 tumours were accompanied by severe oedema. CONCLUSIONS: These radiological findings may facilitate correct diagnosis for IPMs and thus presurgical planning, prognosis evaluation and treatment of meningiomas.
PURPOSE: This study was conducted to describe the imaging features of intracranial psammomatous meningioma (IPM). MATERIALS AND METHODS: Twenty-three patients with a histopathological diagnosis of IPM between January 2007 and August 2016 were retrospectively reviewed. Twenty-two patients underwent contrast-enhanced MRI scanning, and 16 underwent non-enhanced CT. RESULTS: A total of 23 adult patients (3 men, 20 women; mean age, 55.3±7.0 years) with 30 IPMs, including 3 patients with multiple IPMs, were recruited. Twenty tumours (66.7%) were located at the cerebral convexity. The mean size of the lesions was 2.42±0.92cm (range, 1.2-4.8cm). All tumours had a regular shape. On CT scans, 13 masses (13/22) were totally replaced with calcifications, and calcifications were observed in 21 cases (21/22) with higher density. There were 22 cases (22/30) of IPMs presenting adjacent hyperostosis, while 8 cases (8/30) presented no skull changes that were not close to the skull. Nearly half of the cases (14/29) showed mixed hypo- and hyperintensity on T2-weighted images and DWI. PTBE was present in 8 tumours and absent in the other 22, among which only 4 tumours were accompanied by severe oedema. CONCLUSIONS: These radiological findings may facilitate correct diagnosis for IPMs and thus presurgical planning, prognosis evaluation and treatment of meningiomas.