Questions often arise concerning the rule of selecting maximum 2 target lesions per organ, when it comes to paired organs (i.e. lung, kidney, ovaries, lymph nodes). In our analyses, ‘lung’, ‘kidney’, ‘ovaries’, ‘lymph nodes’ etc are considered as 1 organ, irrespective of the number of parts they may be made up of.

Of note, if there are multiple nodal chains/regions, consider selecting one from each, with a maximum of two for this organ. Other nodal lesions can be followed as non-target.