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Localized pleural malignant mesothelioma
Author(s) -
Hirano Hiroshi,
Takeda Shinichi,
Sawabata Yoshinori,
Okumura Yoshitomo,
Maeda Hajime,
Hanibuchi Masaki,
Ito Masami,
Nakagawa Masaru,
Uematsu Kunio
Publication year - 2003
Publication title -
pathology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 74
eISSN - 1440-1827
pISSN - 1320-5463
DOI - 10.1046/j.1440-1827.2003.01529.x
Subject(s) - medicine , mesothelioma , pathological , parietal pleura , radiology , biopsy , nodule (geology) , pathology , metastasis , immunohistochemistry , lung , cancer , paleontology , biology
The occurrence of pleural malignant mesothelioma (MM) is unusual and the cases that appear as a localized tumor are extremely rare. A case of localized pleural MM including immunohistochemical findings is presented. A 70‐year‐old man had an abnormal shadow found during a routine roentgenogram at an annual health checkup and was admitted to Toneyama National Hospital (Toyonaka, Osaka, Japan) for detailed examinations. Chest X‐rays showed a 2 × 5 cm‐sized nodule with relatively smooth margins in the right segment three. Computed tomography (CT) showed an extrapleural mass with a smooth surface and a thickened parietal pleura, and results of a biopsy performed under CT scanning yielded MM. Systematic examinations did not show any metastasis and the patient underwent surgery for removal of the mass. The resected tumor, measuring 3.2 × 3.1 cm, was firm, partially encapsulated, and irregularly shaped. Pathological examinations revealed that it consisted of large polygonal cells, partially showing myxoid patterns, which led to a diagnosis of localized pleural MM. Tumor recurrence was seen, and the duration between initial symptoms and death was 29 months. This case suggests that localized pleural MM has a high proliferative potential and aggressive course, and is considered an early stage of diffuse pleural MM.