Response to capmatinib in a patient with neuroendocrine carcinoma of the gallbladder origin harboring MET amplification

AbstractNeuroendocrine carcinoma (NEC) of the gallbladder origin is particularly rare, accounting for only 0.38% of primary malignancies of the gallbladder, and standard therapies are limited. TheMET gene encodes the tyrosine kinase receptor, c-Met. Pathogenic variants ofMET, such asMET exon 14 skipping andMET amplification, result in excessive downstream signaling that promotes tumor progression. A MET inhibitor, capmatinib, blocks signaling of c-Met and has been approved by the Food and Drug Administration for non-small cell lung cancer withMET exon 14 skipping. The effectiveness of capmatinib has been reported in other cancers withMET amplification, but NEC withMET variants has not been reported. Here, we present a case of a 72-year-old woman with NEC of the gallbladder with multiple liver and lymph node metastases, who was resistant to conventional chemotherapy including carboplatin plus etoposide as first-line treatment and irinotecan as second-line treatment, but she responded to capmatinib. After 6  weeks of treatment, CT scan showed a partial response (80% reduction in size), but after 13 weeks, regrowth of liver metastasis was observed. Herein, we report a meaningful efficacy of capmatinib to the patient of NEC of the gallbladder origin withMET amplification.
Source: International Cancer Conference Journal - Category: Cancer & Oncology Source Type: research