All the other 18 cases in posterior mediastinum were neurogenic tumors.
后纵隔肿瘤18例，均为神经原性肿瘤。
We studied 18 cases of liposarcoma presenting in the posterior mediastinum;
我们研究了18例位于后纵膈的脂肪肉瘤；
Sarcomas of the posterior mediastinum are rare and correspond mostly to neurogenic tumors.
后纵膈肉瘤罕见，大多数为神经源性肿瘤。
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