Table 5. Distribution of right lung segments involvement by region.

Segment	Involved (percentage of total)	Not involved (percentage of total)
Right apical	558 (52.34%)	508 (47.65%)
Right anterior	470 (44.09%)	596 (55.9%)
Right posterior	574 (53.89%)	491 (46.1%)
Right medial	447 (41.93%)	619 (58.06%)
Right lateral	556 (52.15%)	510 (47.84%)
Right superior basal	628 (58.91%)	438 (41.08%)
Right anterior basal	280 (26.24%)	786 (73.73%)
Right medial basal	545 (51.12%)	521 (48.87%)
Right lateral basal	612 (57.41%)	454 (42.58%)
Right posterior basal	647 (60.69%)	419 (39.3%)