Figure 6.

Intrathoracic lymph node disease (lateral view) (Gie 2003; Marais et al. 2004b). It is essential to perform good quality AP and lateral views. One can see density behind and below the carina, which is not the area where normal physiological structures occur. Also, some fluid in the horizontal and transverse fissures indicates some inflammatory response (not indicative of TB). The dense circular ring around the hilum (so-called doughnut sign) is indicative of perihilar lymph node involvement.