It is a sign of an underlying disease or infection. You can opt-out at any time. 4.10 ). Superior Mediastinal Nodes 2-4 2R.Upper Paratracheal 2R nodes extend to the left lateral border of the trachea. In addition, a positron emission tomography (PET) scan revealed uptake in several mediastinal lymph nodes with a standard uptake value of 8. We are trying to stay positive but this one seems confusing. Mediastinoscopy. doi:10.1016/j.jrid.2018.01.002. Examples of this can be found in a study by OConnell et al (20). My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. //