title: Pulmonary pleomorphic carcinoma detected as a result of pneumothorax and the subsequent occurrence of multiple cystic metastases.
abstract: A 39-year-old man was admitted for spontaneous pneumothorax. He underwent pulmonary resection to correct the lesion causing the air leakage, and a pathological diagnosis of pulmonary pleomorphic carcinoma was made because we thought that the pneumothorax developed due to the direct rupture of necrotic neoplastic tissue into the pleural cavity. After the operation, the patient received chemotherapy, during which multiple cystic metastases gradually developed in the lung that caused repeated occurrences of pneumothorax. Clinicians must be careful to recognize that pneumothorax can also be a complication of primary and various metastatic pulmonary malignancies.
authors.affiliation: Department of Internal Medicine, Division of Respiratory Medicine, Jikei University School of Medicine, Kashiwa Hospital, 163-1 Kashiwashita, Kashiwa, Chiba, Japan.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Yamakawa
authors.affiliation: Department of Internal Medicine, Division of Respiratory Medicine, Jikei University School of Medicine, Kashiwa Hospital, 163-1 Kashiwashita, Kashiwa, Chiba, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yoshida
authors.affiliation: Department of Internal Medicine, Division of Respiratory Medicine, Jikei University School of Medicine, Kashiwa Hospital, 163-1 Kashiwashita, Kashiwa, Chiba, Japan.
authors.forename: Masami
authors.initials: M
authors.lastname: Yabe
authors.affiliation: Department of Internal Medicine, Division of Respiratory Medicine, Jikei University School of Medicine, Kashiwa Hospital, 163-1 Kashiwashita, Kashiwa, Chiba, Japan.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Baba
authors.affiliation: Department of Internal Medicine, Division of Respiratory Medicine, Jikei University School of Medicine, Kashiwa Hospital, 163-1 Kashiwashita, Kashiwa, Chiba, Japan.
authors.forename: Emiri
authors.initials: E
authors.lastname: Baba
authors.affiliation: Department of Internal Medicine, Division of Diagnostic Pathology, Jikei University School of Medicine, Kashiwa Hospital, Chiba, Japan.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Katagi
authors.affiliation: Department of Internal Medicine, Division of Respiratory Medicine, Jikei University School of Medicine, Kashiwa Hospital, 163-1 Kashiwashita, Kashiwa, Chiba, Japan.
authors.forename: Takeo
authors.identifier: 0000-0002-5616-806X
authors.initials: T
authors.lastname: Ishikawa
authors.affiliation: Department of Internal Medicine, Division of Respiratory Medicine, Jikei University School of Medicine, Kashiwa Hospital, 163-1 Kashiwashita, Kashiwa, Chiba, Japan.
authors.forename: Masamichi
authors.initials: M
authors.lastname: Takagi
authors.affiliation: Department of General Thoracic Surgery, Division of Surgery, Jikei University School of Medicine, Kashiwa Hospital, Chiba, Japan.
authors.forename: Takeo
authors.initials: T
authors.lastname: Nakada
authors.affiliation: Department of General Thoracic Surgery, Division of Surgery, Jikei University School of Medicine, Kashiwa Hospital, Chiba, Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Akiba
authors.affiliation: Department of Internal Medicine, Division of Respiratory Medicine, Jikei University School of Medicine, Tokyo, Japan.
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Kuwano