Two lung masses with different responses to pemetrexed.
We described here a patient who had two lung masses. Although the two masses had the same histology and a similar good response to initial chemotherapy with gemcitabine and carboplatin, the response to pemetrexed as a second-line treatment was different after re-growth of the tumors. These two lung masses could have originated from different clones or they could have progressed through different paths of molecular pathogenesis after metastasis, which would lead to different tumor characteristics, including their chemosensitivity. Regardless of their pathogenetic mechanisms, it seems important to recognize that tumors with the same histology that develop in one patient can have different responses to drugs.
Department of Internal Medicine, Korea Cancer Center Hospital, Seoul, Korea.
Kwang Young
KY
Park
Jae Wook
JW
Jung
Seung Bum
SB
Nam
Ho Jin
HJ
Lee
Hyo Seok
HS
Kim
Yoon Hee
YH
Choi
Jae Cheol
JC
Lee
D000368:Aged; D000964:Antimetabolites, Antineoplastic / Q000627:therapeutic use*; D000970:Antineoplastic Agents / Q000627:therapeutic use; D016190:Carboplatin / Q000627:therapeutic use; D002294:Carcinoma, Squamous Cell / Q000188:drug therapy* / Q000473:pathology; D003841:Deoxycytidine / Q000031:analogs & derivatives / Q000627:therapeutic use; D019008:Drug Resistance, Neoplasm; D005260:Female; D005971:Glutamates / Q000627:therapeutic use*; D006147:Guanine / Q000031:analogs & derivatives* / Q000627:therapeutic use; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy* / Q000473:pathology; D016609:Neoplasms, Second Primary / Q000188:drug therapy* / Q000473:pathology; D000068437:Pemetrexed; D000093542:Gemcitabine
D000964:Antimetabolites, Antineoplastic; D000970:Antineoplastic Agents; D005971:Glutamates; D000068437:Pemetrexed; D003841:Deoxycytidine; D006147:Guanine; D016190:Carboplatin; D000093542:Gemcitabine