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1.The patient underwent surgery to remove the pheochromoblastoma.
患者接受了手术以移除脑膜瘤。
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2.The diagnosis of pheochromoblastoma is often challenging due to its rare occurrence.
由于其罕见性，诊断脑膜瘤往往具有挑战性。
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3.Researchers are still trying to understand the complex relationship between pheochromoblastoma and other brain tumors.
研究人员仍在努力理解脑膜瘤与其他大脑肿瘤之间的复杂关系。