WHEN IS TISSUE STAGING NOT REQUIRED ?

When is tissue staging not required ?
tissue confirmation of the mediastinal stage isn't required in
patients with sclc, stage iv nsclc, or malignant pleural
effusion. five within these patients, the standing of the mediastinum is
irrelevant to defining the appropriate treatment. in patients
with in depth mediastinal infiltration ( radiographic cluster a,
fig. 29. one ), the radiographic stage is widely accepted as accurate
while not tissue confirmation. five it should be acknowledged that
this is predicated on general clinical expertise, as a result of there's no
revealed information to prove this. these recommendations are summarized
in table 29. three.
tissue confirmation of the mediastinal stage is unnecessary
in patients with ci tumors based mostly on a chest ct and a
clinical analysis ( i. e., history and physical examination ) ( radiographic
cluster d, fig. 29. one ). five this is predicated on extensive
information that n2 node involvement ( as assessed at thoracotomy ) is
found in 10% of such patients. five the prospect of creating the
diagnosis of n2 involvement by preoperative invasive staging
is lower, as a result of the sensitivity of those tests isn't excellent.
a pet scan to evaluate the mediastinum additionally seems to not
be required in patients with ci tumors. six, 23, 42, forty three this is often because
the prospect of finding a pet-positive n2 nodal metastasis is
5%. 23, forty three in reality, there's a better likelihood of being misled by
pet ( fp mediastinal uptake or fp distant web site of uptake ) than
the prospect of correctly identifying disease spread in patients
with ci tumors.