CAJ | 학술논문

目的：分析颅内毛细胞星形细胞瘤MRI表现及特点。方法回顾性分析经手术、病理证实的17例毛细胞星形细胞瘤MRI表现。结果17例中，小儿11例，成人6例。其中幕下11例（64.7%）。肿瘤12例为囊实性，4例为囊性，1例为实性。肿瘤边缘光整，伴有轻度水肿者6例，梗阻性脑积水12例，瘤内出血3例。肿瘤囊性成分T1WI呈低信号，T2WI呈高信号；肿瘤实性部分、囊壁T1WI呈等、稍低信号，T2WI呈等、稍高信号。增强后，实性部分明显强化，囊壁不强化或轻度强化，囊性部分不强化。结论毛细胞星形细胞瘤好发于小儿，成人患者发病相对较少，肿瘤多为囊实性，MRI表现有一定的特征性，可提高其术前诊断准确性。
목적：분석로내모세포성형세포류MRI표현급특점。방법회고성분석경수술、병리증실적17례모세포성형세포류MRI표현。결과17례중，소인11례，성인6례。기중막하11례（64.7%）。종류12례위낭실성，4례위낭성，1례위실성。종류변연광정，반유경도수종자6례，경조성뇌적수12례，류내출혈3례。종류낭성성분T1WI정저신호，T2WI정고신호；종류실성부분、낭벽T1WI정등、초저신호，T2WI정등、초고신호。증강후，실성부분명현강화，낭벽불강화혹경도강화，낭성부분불강화。결론모세포성형세포류호발우소인，성인환자발병상대교소，종류다위낭실성，MRI표현유일정적특정성，가제고기술전진단준학성。
Objective To evaluate the MRI imaging features of intracranial pilocytic astrocytoma. Methods A retrospective analysis was made to the MRI manifestations of pilocytic astrocytoma in 17 cases confirmed by operation and pathologic study. Results Of all the 17 patients,11 cases were children,6 cases were adults,11 cases were in infratentorial region(64.7%).12 cases were cystic-solid, 4 cases were completely cystic degeneration,1 case was solid. The tumors had clear edges, 6 cases had peritumoral edema and 12 cases had obstructive hydrocephalus,3 cases presented with hemorrhage. The cystic part appeared as hypointensity on T1WI and hyperintensity on T2WI. The solid part of the tumors, the cystic wall manifested iso-hypointensity on T1WI, and iso-hyperintensity on T2WI. After the injection of contrast media, the solid part showed significant enhancement while the cystic wall showed no enhancement or slight enhancement, the cystic part showed no enhancement. Conclusion The pilocytic astrocytoma is usually seen in children and teenagers, adults are relatively less. Most of tumors are cystic-solid, MRI of pilocytic astrocytoma has characteristic imaging findings, which may improve the accurate diagnosis for preoperative clinic.