Relating to or situated within the thorax (chest cavity); describing structures, spaces, or conditions inside the chest.
From Greek 'endo-' (within) and 'thorax' (chest), with the adjective suffix '-ic', used in anatomy and medicine to describe anything located inside the rib cage and surrounding structures.
Doctors use 'endothoracic' when discussing tumors, infections, or fluid collections inside the chest—it's one of those handy medical terms that immediately tells you something is happening deep inside rather than on the surface.
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