[Intramuscular myxoma of intercostal muscle; report of a case].
A 72-year-old woman was reffered to our hospital for further examination of a tumor shadow in the left upper lung field which was detected in a mass screening chest X-ray. Computed tomography (CT) and magnetic resonance imaging (MRI) revealed a chest wall tumor located in the left 4th intercostal space. The lesion was suspected to be neurogenic tumor and CT-guided needle biopsy was performed. The tumor was consisted of spindle-shaped cells, but immunohistochemistry demonstrated no evidence of neurogenic tumor. As a possibility of malignant tumor could not denied, we performed tumor resection under video-assisted surgery. The lesion was not originated from nerves, but adhered to the intercostal muscle. Histologically, the tumor was consisted of spidle-shaped cells without atypia which sparsely proliferate in the myxoid stroma adjacent to intercostal muscle. In immunohistochemistry, tumor cells were positive for vimentin, and negative for desmin, S-100 protein, smooth muscle actin, CD34 and factor VIII. It was diagnosed as intramuscular myxoma. This histology in the intercostal muscle is extremely rare.
Yoshioka
Takashi
T
Department of Surgery, Fukuyama City Hospital, Fukuyama, Japan.
Muro
Masahiko
M
Kumano
Kenjiro
K
Yamashita
Tetsumasa
T
Kurose
Youhei
Y
Kubo
Shinichirou
S
Nojima
Hiroki
H
Nakano
Kanyu
K
Asami
Shinya
S
Sasaki
Hiroshi
H
Idani
Hitoshi
H
Kin
Hitoshi
H
Takakura
Norihisa
N
D000368:Aged; D005260:Female; D006801:Humans; D007366:Intercostal Muscles; D019042:Muscle Neoplasms / Q000175:diagnosis / Q000473:pathology*; D009232:Myxoma / Q000175:diagnosis / Q000473:pathology*