182.All are true regarding intrathoracic lymph nodes metastases except
a.skip metastases to mediastinal nodes in the absence of
hilar nodes
is seen in 53% of cases
b.mediastinal nodes with a short axis diameter more than than
10
mm should usually be considered enlarged.
c.Fused PET–CT imaging
is more accurate than PET or CT alone
in staging patients with non-small
cell lung cancer .
d. Mediastinoscopy and mediastinotomy remain the most
widely
employed techniques for mediastinal lymph node sampling
e. the MRI signal within nodes is not a useful predictor
of
involvement of nodes
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