THE NEED FOR CHANGE AMONG LUNG CANCER CLINICIANS

Undoubtedly, the lung cancer community owes an enormous
debt of gratitude to the pioneers of tnm, particularly to dr.
clifton mountain. but, over the last decade, there has
grown a feeling among lung cancer clinicians and scientists that
changes were required to the method for revision of the tnm
classification for lung cancer. the mountain database, which
had been the major supply of knowledge to inform revisions of the
tnm system up to and that including the 6th edition had, by
1996, enlarged to embody 5319 cases. therefore, it had been a relatively
tiny database, accumulated over twenty years, throughout that period
several advances had been created within the techniques on the market for
pretreatment staging, most noticeably the routine application
of computed tomography ( ct ) scanning. the nice majority
of cases during this database had been referred for surgical treatment
and had been recruited from one center. there have been
understandable considerations on whether or not the recommendations
emanating from such a database were traditionally valid, globally
relevant, and appropriate for evaluating treatment by nonsurgical
or combined modality care. oncologists treating tiny cell
lung cancer ( sclc ) had abandoned tnm for all, except those
terribly limited cases during which dissection was thought-about and that instead
were using an easyr classification based mostly on the single distinction
between “limited” or “extensive” disease. 22 even when
used in a very surgical setting and for nslc, the dearth of validation
in previous editions of the tnm classification of malignant
tumours had led to several of the descriptors being increasingly
challenged. knowledge had been revealed suppor ting size cutoffs
different than the 3-cm limit separating t1 and t2 tumors, ranging
from but one cm to quite nine cm. “irresectable” t4
tumors had been resected with smart results in selected cases.
the descriptors applied to cases during which there have been additional
tumor nodules within the lobe of the primary and different ipsilateral
lobes were usually regarded as harsh. oncologists had long
treated cases with pleural effusion, the “wet” iiib cases, with
the therapeutic strategies used for patients with metastatic,
stage iv disease. clearly, if the tnm classification was to retain
its central role within the day-to-day care of patients with lung
cancer in a veryn evidence-based era, its recommendations had to be
intensively validated and the method for amendment had to be modernized
to form the staging system fit for purpose. these concerns
crystallized at an international association for the study
of lung cancer ( iaslc ) workshop on “intrathoracic staging”
held at the brompton hospital in london in october 1996. 23
one in all the revealed recommendations of this meeting was
“the establishment by the iaslc of a staging committee