Pulmonary nocardiosis mimicking small cell lung cancer in ectopic ACTH syndrome associated with transformation of olfactory neuroblastoma: A case report

Keigo Kobayashi, Takanori Asakura, Makoto Ishii, Soichiro Ueda, Hidehiro Irie, Hiroyuki Ozawa, Kohei Saitoh, Isao Kurihara, Hiroshi Itoh, Tomoko Betsuyaku