24 September 2020
: Case report 
Mediastinal Metastasis of Breast Cancer Mimicking a Primary Mediastinal Tumor
Challenging differential diagnosis
Takashi Yamashita1ABCDEF*, Mana Watahiki2BCDEF, Katsuyuki Asai1DEDOI: 10.12659/AJCR.925275
Am J Case Rep 2020; 21:e925275
Figure 3. Pathological findings of case 1. The tumor was identified as adenocarcinoma (A). Immunostaining was negative for estrogen receptor (ER) (B) and progesterone receptor (PR) (C), and positive for human epidermal growth factor receptor 2 (HER2) (D).