Metastasis

...In recent years, the incidence of primary infection has decreased, while the incidence of pre-existing infection has become prominent, and pulmonary tuberculosis accounts for the majority of tuberculosis cases. There are three ways for tuberculosis to spread: intraluminal metastasis, hematogenous metastasis, and lymphatic metastasis. (Metastasis refers to the migration of pathogens or cancer cells from one location to another, causing the same lesions there as in the primary lesion.) (1) Intraluminal metastasis: The tuberculosis bacteria in the walls of pulmonary tuberculosis travel through the bronchi to other parts of the lungs, and if phlegm that has reached the trachea is swallowed unknowingly, it can reach the intestines through the stomach and cause intestinal tuberculosis. ...

*Some terminology explanations that mention "metastasis" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…最近では初感染発病は減少し，既感染発病が目だっており，また結核のなかでは肺結核が大多数を占めている。結核の広がり方には管内性転移，血行性転移，リンパ行性転移の三つの経路がある(なお転移metastasisとは，病原体や癌細胞などがある場所から離れた別の場所に移行し，そこに原発巣と同じ病変を起こすことをいう)。(1)管内性転移　肺結核の空洞壁の結核菌は気管支を通って肺のほかの場所にいくし，また気管まで出た痰を知らないで飲み込むと，胃を通って腸に達し，腸結核などを起こす。…

※「metastasis」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報