Perioperative chemotherapy with pemetrexed and cisplatin for pulmonary large-cell neuroendocrine carcinoma: a case report and literature review

Hong Tang, Hongyan Wang, Shaoyan Xi, Chunyu He, Yuxi Chang, Qiming Wang, Yufeng Wu, Hong Tang, Hongyan Wang, Shaoyan Xi, Chunyu He, Yuxi Chang, Qiming Wang, Yufeng Wu

Abstract

Background: Pulmonary large-cell neuroendocrine carcinoma (LCNEC) is associated with poor prognosis, and its treatment strategy is still controversial, especially regarding chemotherapy regimens.

Case report: We present the case of a 49-year-old Chinese male with primary pulmonary LCNEC treated with neoadjuvant and adjuvant chemotherapy with cisplatin plus pemetrexed. A suspected quasi-circular mass in the left lower pulmonary lobe and an enlarged mediastinal lymph node were found. The patient was diagnosed with adenocarcinoma with neuroendocrine differentiation based on computerized tomography-guided percutaneous lung biopsy. An EGFR gene mutation test showed negative results. Cisplatin and pemetrexed were administered as the neoadjuvant chemotherapy regimen. The primary lesion had reduced markedly, and the enlarged mediastinal lymph node had disappeared after two cycles of neoadjuvant chemotherapy. A left lower lobectomy and mediastinal lymph node dissection were performed. The lesion was confirmed as LCNEC based on postoperative histopathological analysis and immunohistochemical results. The patient underwent four cycles of adjuvant chemotherapy with cisplatin and pemetrexed for a month postoperatively, followed by postoperative adjuvant radiotherapy. The patient was still alive after a follow-up of 24 months, with no evidence of tumor recurrence.

Conclusion: Cisplatin combined with pemetrexed is effective and safe for patients with pulmonary LCNEC.

Keywords: cisplatin; large-cell neuroendocrine carcinoma; pemetrexed; pulmonary tumor.

Conflict of interest statement

Disclosure The authors report no conflicts of interest in this work.

Figures

Figure 1
Figure 1
Prior to neoadjuvant chemotherapy, computerized tomography images of chest in March 2015 indicated a quasi-circular mass in the left lower pulmonary lobe, together with an enlarged mediastinal lymph node.
Figure 2
Figure 2
Histopathological examination of the biopsy specimen revealed a poorly differentiated adenocarcinoma with neuroendocrine differentiation (A, ×100), immunohistochemical staining for CK (B, ×200), CK7 (C, ×200), Ki-67 (D, ×200), P63 (E, ×200), and transcription factor-1 (F, ×200). Abbreviation: CK, cytokeratin.
Figure 3
Figure 3
After two cycles of pemetrexed with cisplatin neoadjuvant chemotherapy, computerized tomography images of chest in May 2015 indicated that the left lower lobe tumor shrank significantly than before and the enlarged mediastinal lymph node almost disappeared.
Figure 4
Figure 4
Histopathological examination of surgical specimens revealed LCNEC. Notes: H&E staining for specimens (A, ×200) and immunohistochemical staining for CD56 (B, ×200), synaptophysin (C, ×200), chromogranin-A (D, ×200), neuron-specific enolase (E, ×200), and NapsinA (F, ×200). Abbreviations: CD56, cluster of differentiation 56; LCNEC, large-cell neuroendocrine carcinoma.
Figure 5
Figure 5
Computerized tomography images of chest indicated that no evidence of recurrence has been detected during the 24-month follow-up. (A and B) Images in June 2015; (C and D) Images in March 2017. (A and C) Images of vertical window; (B and D): images of lung window.

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