It is critical to know the anatomic location of this resected tumor - is it in the chest or "lower abdomen" (as both locations were described in the history provided)? If in the chest, where exactly in the chest? Chest wall? Pleura based pedunculated mass? Is this actually a mediastinal mass? Can you show a chest CT or MRI image of the tumor?

The neoplastic cells are very epithelioid in appearance, with spindled shape and occasional bizarre giant cells. There is hemangiopericytoma-like vascular pattern in this neoplasm, and makes me suspect type A thymoma or type C thymic carcinoma. Solitary fibrous tumor is not supported by the lack of collagenous fibers between cells. Is there any normal thymic tissue at the periphery of tumor? Is there any lung parenchyma? Sorry for asking more questions and giving few answers.

 学习mjma老师的诊断意见，并试译如下：（有不正确之处请及时指正，谢谢）

了解切除肿瘤的解剖学位置至关重要，它是在胸部还是在下腹部？（这些在提供的病史中应当被描述到）。如果在胸部，请看他的准确部位？是胸壁吗？是来自胸膜的带蒂肿块吗？是纵隔的肿块吗？你能提供关于肿瘤的胸部CT或MRI的影像吗？

肿瘤细胞主要以上皮样细胞为主，伴有梭形细胞和少见的奇异形的巨细胞。肿瘤中可见血管外皮细胞瘤样的血管结构，使我考虑A型胸腺瘤或C型胸腺癌。由于细胞间缺乏胶原纤维，因此不支持诊断孤立性纤维瘤。肿瘤周围有一些正常胸腺组织吗？有一些肺实质的结构吗？对我问的更多问题及给出很少的回答感到歉意。