“Essential TNM” that can be used to collect stage data when complete information is not available.
Information on anatomical extent of disease at presentation or stage is central to cancer surveillance to determine cancer burden as it provides additional valuable information to incidence and mortality data. However, cancer registries in low- and middle-income countries frequently have insufficient information to determine complete TNM data, either because of inability to perform necessary investigations or because of lack of recording of information.
In view of this the UICC TNM Project has with the International Agency for Research in Cancer and the National Cancer Institute developed a new classification system “Essential TNM” that can be used to collect stage data when complete information is not available. To date Essential TNM schemas have been developed for breast, cervix, colon, and prostate cancer, and are presented in the TNM Classification of Malignant Tumours Eighth Edition.
When the T, N, and M categories have not been recorded in the clinical records or if the data to determine the categories is not available, Using the schema for breast, colorectal cancer, prostate or cervix cancer the extend of disease may be recorded as Stage I,II,III,or IV or if insufficient data as distant, regional or localized.
Essential TNM is composed of three key elements that together summarize the extent of cancer in the patient.
Depending on the information available the T category can be recorded of if not available the extent of the local tumour as advanced or localized as below:
Published by the Union for International Cancer Control, the TNM Classification of Malignant Tumours (TNM) is a globally recognised standard for classifying the extent of spread of cancer.
How the TNM classification is defined and updated.
TNM publications include The TNM Classification of Malignant Tumours 8th edition, The TNM Supplement, 5th Edition, the TNM Atlas and many others.
eCancer and UICC jointly produced a set of 7 modules on TNM staging for the purpose of educating and informing the global cancer community on the globally accepted classification of malignant tumours.
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