A tendency for suprasellar arachnoid cysts (SACs) to occur in young children is known. Data of adult SACs were rare in previous reports. The aim of this study is to discuss their clinical presentations, radiological features, and treatment outcomes based on 23 adult patients who underwent endoscopic fenestration in our hospital between January 2003 and December 2018. Preoperative cyst volume ranged from 12.3 to 72.5 cm3 (mean 39.8 ± 19.8). Endocrine disorders occurred in 7 (30.4%) patients. Hydrocephalus was observed in 20 patients. In the patients with hydrocephalus, the mean preoperative Evans' index (EI) (%) and frontooccipital horn ratio (FOHR) (%) were 44.8 (ranged 32.2-63.4) and 49.6 (ranged 36.7-59.8), respectively. A bivariate correlation showed significant positive association between preoperative cyst volume and preoperative EI or FOHR (Pearson correlation, r = 0.607, p = 0.005; r = 0.583, p = 0.007). The slit-valve phenomenon was observed in 13 (56.5%) patients. Pale/tenacious cyst walls were observed in 12 (52.2%) patients. Postoperatively, all patients achieved the improvement in clinical symptoms and a decrease in cyst size. The mean decreases in cyst volume, EI, and FOHR were 64.7%, 7.89%, and 5.8%, respectively. A bivariate correlation indicated the irrelevance between the postoperative cyst volume and postoperative EI or FOHR (Pearson correlation: r = 0.37, p = 0.11; r = 0.43, p = 0.054). These results reveal that there are a few differences in several aspects between adult patients and child patients. The severity of hydrocephalus is correlated with cyst size in adult patients. Additionally, the excellent outcomes in adult SACs can be obtained by endoscopic fenestration.

中文翻译：

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成人鞍上蛛网膜囊肿：临床表现、放射学特征和治疗结果。

已知儿童有鞍上蛛网膜囊肿 (SAC) 发生的趋势。在以前的报告中，成人 SAC 的数据很少见。本研究的目的是基于 2003 年 1 月至 2018 年 12 月期间在我院接受内镜开窗术的 23 名成年患者讨论其临床表现、放射学特征和治疗结果。术前囊肿体积范围为 12.3 至 72.5 cm3（平均 39.8 ± 19.8）。7 名（30.4%）患者发生内分泌紊乱。在 20 名患者中观察到脑积水。在脑积水患者中，术前平均埃文斯指数 (EI) (%) 和额枕角比 (FOHR) (%) 分别为 44.8（范围为 32.2-63.4）和 49.6（范围为 36.7-59.8）。双变量相关显示术前囊肿体积与术前 EI 或 FOHR 显着正相关（Pearson 相关，r = 0.607，p = 0.005；r = 0.583，p = 0.007）。在 13 名 (56.5%) 患者中观察到裂隙瓣现象。在 12 名 (52.2%) 患者中观察到苍白/顽固的囊壁。术后所有患者临床症状均改善，囊肿体积缩小。囊肿体积、EI 和 FOHR 的平均减少分别为 64.7%、7.89% 和 5.8%。双变量相关表明术后囊肿体积与术后 EI 或 FOHR 无关（Pearson 相关性：r = 0.37，p = 0.11；r = 0.43，p = 0.054）。这些结果表明，成人患者和儿童患者在几个方面存在一些差异。成人患者脑积水的严重程度与囊肿大小有关。此外，通过内窥镜开窗术可以获得成人 SAC 的优异结果。