High-level MAL2 staining was most frequent in serous carcinomas (102/182, 56%), followed by mucinous (5/10, 50%), clear cell (3/8, 38%) and endometrioid subtypes (6/20, 30%) (Fig. 3a), and serous carcinomas also displayed the highest median MAL2 SPC (Table 2). This evidence concerns the gene MAL2 and serous adenocarcinoma.