Masaoka staging

A system that is used clinically to stage thymomas, and is the most important determinant of survival post surgical resection; it is comprised of four stages (the last of which contains two sub-stages):
▪ Stage I—Intact thymic capsule;
▪ Stage II—Capsular invasion into adjacent mediastinal fat or pleura;
▪ Stage III—Macroscopic invasion into adjacent organs and vessels;
▪ Stage IVa—Dissemination in thoracic cavity (i.e pleural or pericardial implants); and
▪ Stage IVb—Distant metastases.
Stage II and above are regarded as thymic carcinoma.

单词	masaoka staging
释义	Masaoka staging Masaoka staging A system that is used clinically to stage thymomas, and is the most important determinant of survival post surgical resection; it is comprised of four stages (the last of which contains two sub-stages): ▪ Stage I—Intact thymic capsule; ▪ Stage II—Capsular invasion into adjacent mediastinal fat or pleura; ▪ Stage III—Macroscopic invasion into adjacent organs and vessels; ▪ Stage IVa—Dissemination in thoracic cavity (i.e pleural or pericardial implants); and ▪ Stage IVb—Distant metastases. Stage II and above are regarded as thymic carcinoma.
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