红字部分如何翻译？不知什么意思。

A pathological examination of the pleura revealed nonspecific but severely inflamed fibroconnective tissue with dominant infiltration of lymphocytes (Fig. 4) and no malignancy, Congo red staining, or infiltration of plasma cells, with an IgG4/IgG ratio exceeding 40%.

胸膜病理检查显示非特异性但严重炎症的纤维结缔组织，淋巴细胞浸润为主(图4)，无恶性肿瘤、刚果红染色或浆细胞浸润，IgG4/IgG比值超过40%。