Prognostic factors for malignant tumours

Prognostic factors for malignant tumours

Tissue assessment is important for cancer prognosis. Stage is generally the most important prognostic factor for carcinomas. The internationally accepted Union for International Cancer Control (UICC)/American Joint Committee on Cancer (AJCC) staging schemes depend heavily on the histopatho - logical TNM (Tumour Node Metastasis) category (pTNM), although the overall stage and in particular the M category are also ev aluated clinically and on imaging and the final stage is derived from a combination of clinical, imaging, pathological and other assessments. The degree of di ff erentiation may also be prognostic and is usually determined microscopically . As a of their non-neoplastic tissue counterparts ( Figures 11.15 and 11.16 ) , whereas poorly di ff erentiated tumours do not ( Figures 11.11 and 11.12 ) . Other histological features associated with a worse prognosis include vascular invasion ( Figure 11.11 ), perineural in vasion ( Figure 11.10 ) and positive resection margins. The prognostic value of these factors di ff ers between tumour types and sites. - There is an increasing number of potential prognostic fac tors for a wide range of malignancies and preneoplastic lesions. These include immunohistochemical tests and molecular tests that may aim to detect underlying genetic changes such as or amplifications or may help to refine grading. For mutations example, immunohistochemistry for the proliferation marker Ki67 is now essential for grading and prediction of behaviour of well-di ff erentiated neuroendocrine neoplasms. Screen - ing for mismatch repair (MMR) gene abnormalities using immunohistochemistry helps to predict response to therapy , outcome and the need for genetic testing for familial disease. Although controversial, immunohistochemical staining help to predict the behaviour of preneoplastic lesions might such as Barrett’s oesophagus (p53 staining) or cervical/anal intraepithelial neoplasia (p16 staining).

Figure 11.15 A well-differentiated squamous cell carcinoma. Irregular nests of squamous cells are present. They include foci of keratinisa tion (arrows). Figure 11.16 A well-differentiated adenocarcinoma. Gland formation (arrow) is obvious. Figure 11.17 A metastatic clear cell carcinoma composed of sheets of cells with clear cytoplasm. A tumour with this appearance is most likely to be of renal origin but could have other sources such as liver, parathyroid gland, gynaecological tract and gastrointestinal tract.

Prognostic factors for malignant tumours

Tissue assessment is important for cancer prognosis. Stage is generally the most important prognostic factor for carcinomas. The internationally accepted Union for International Cancer Control (UICC)/American Joint Committee on Cancer (AJCC) staging schemes depend heavily on the histopatho - logical TNM (Tumour Node Metastasis) category (pTNM), although the overall stage and in particular the M category are also ev aluated clinically and on imaging and the final stage is derived from a combination of clinical, imaging, pathological and other assessments. The degree of di ff erentiation may also be prognostic and is usually determined microscopically . As a of their non-neoplastic tissue counterparts ( Figures 11.15 and 11.16 ) , whereas poorly di ff erentiated tumours do not ( Figures 11.11 and 11.12 ) . Other histological features associated with a worse prognosis include vascular invasion ( Figure 11.11 ), perineural in vasion ( Figure 11.10 ) and positive resection margins. The prognostic value of these factors di ff ers between tumour types and sites. - There is an increasing number of potential prognostic fac tors for a wide range of malignancies and preneoplastic lesions. These include immunohistochemical tests and molecular tests that may aim to detect underlying genetic changes such as or amplifications or may help to refine grading. For mutations example, immunohistochemistry for the proliferation marker Ki67 is now essential for grading and prediction of behaviour of well-di ff erentiated neuroendocrine neoplasms. Screen - ing for mismatch repair (MMR) gene abnormalities using immunohistochemistry helps to predict response to therapy , outcome and the need for genetic testing for familial disease. Although controversial, immunohistochemical staining help to predict the behaviour of preneoplastic lesions might such as Barrett’s oesophagus (p53 staining) or cervical/anal intraepithelial neoplasia (p16 staining).

Figure 11.15 A well-differentiated squamous cell carcinoma. Irregular nests of squamous cells are present. They include foci of keratinisa tion (arrows). Figure 11.16 A well-differentiated adenocarcinoma. Gland formation (arrow) is obvious. Figure 11.17 A metastatic clear cell carcinoma composed of sheets of cells with clear cytoplasm. A tumour with this appearance is most likely to be of renal origin but could have other sources such as liver, parathyroid gland, gynaecological tract and gastrointestinal tract.

Prognostic factors for malignant tumours

Tissue assessment is important for cancer prognosis. Stage is generally the most important prognostic factor for carcinomas. The internationally accepted Union for International Cancer Control (UICC)/American Joint Committee on Cancer (AJCC) staging schemes depend heavily on the histopatho - logical TNM (Tumour Node Metastasis) category (pTNM), although the overall stage and in particular the M category are also ev aluated clinically and on imaging and the final stage is derived from a combination of clinical, imaging, pathological and other assessments. The degree of di ff erentiation may also be prognostic and is usually determined microscopically . As a of their non-neoplastic tissue counterparts ( Figures 11.15 and 11.16 ) , whereas poorly di ff erentiated tumours do not ( Figures 11.11 and 11.12 ) . Other histological features associated with a worse prognosis include vascular invasion ( Figure 11.11 ), perineural in vasion ( Figure 11.10 ) and positive resection margins. The prognostic value of these factors di ff ers between tumour types and sites. - There is an increasing number of potential prognostic fac tors for a wide range of malignancies and preneoplastic lesions. These include immunohistochemical tests and molecular tests that may aim to detect underlying genetic changes such as or amplifications or may help to refine grading. For mutations example, immunohistochemistry for the proliferation marker Ki67 is now essential for grading and prediction of behaviour of well-di ff erentiated neuroendocrine neoplasms. Screen - ing for mismatch repair (MMR) gene abnormalities using immunohistochemistry helps to predict response to therapy , outcome and the need for genetic testing for familial disease. Although controversial, immunohistochemical staining help to predict the behaviour of preneoplastic lesions might such as Barrett’s oesophagus (p53 staining) or cervical/anal intraepithelial neoplasia (p16 staining).

Figure 11.15 A well-differentiated squamous cell carcinoma. Irregular nests of squamous cells are present. They include foci of keratinisa tion (arrows). Figure 11.16 A well-differentiated adenocarcinoma. Gland formation (arrow) is obvious. Figure 11.17 A metastatic clear cell carcinoma composed of sheets of cells with clear cytoplasm. A tumour with this appearance is most likely to be of renal origin but could have other sources such as liver, parathyroid gland, gynaecological tract and gastrointestinal tract.