Author(s): Koma Y, Nakashima N, Koyama M, Goto K, Yokota N
Here, we report 2 cases of recurrent invasive mucinous adenocarcinoma of the lung after surgery, which showed marked responses to platinum-based regimens with pemetrexed(PEM)and bevacizumab(BEV). The first patient was diagnosed with stage I B(p-T2N0M0)invasive mucinous adenocarcinoma, and new nodules were detected on computed tomography (CT)after 24 months of adjuvant chemotherapy with uracil/tegafur(UFT). Therefore, the patient was administered carboplatin(CBDCA; AUC 5.0), PEM(500mg/m2), and BEV(15mg/kg)for 6 courses followed by BEV(15mg/kg)for 3 courses, resulting in a complete response. The second patient was diagnosed with stage IV(p-T3N0M1)invasive mucinous adenocarcinoma, and metastases appeared after the surgery. The patient was treated with S-1 for 18 weeks, but the tumor recurred 18weeks after surgery. Therefore, the patient was administered 4 courses of cisplatin(CDDP 60mg/m2), PEM(500mg/m2), and BEV(15mg/kg)followed by 5 courses of PEM(15mg/kg)as maintenance therapy. This resulted in a good response. The first patient had grade 3 toxicities at the sixth course of combined CBDCA-PEM-BEV therapy, while the second patient did not have any adverse events throughout chemotherapy. These 2 cases showed that platinum-based regimens with PEM and BEV may be a good choice for patients with invasive mucinous adenocarcinoma of the lung.