Small cell carcinoma of the lung natural history, complications and prognosis: Difference between revisions
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Although for most patients with small cell carcinoma of lung the current treatment regimens do not provide cure, the potential prognostic factors that are considered to influence the prognosis of the disease, i.e. the chance of recovery and treatment options include the following. | Although for most patients with small cell carcinoma of lung the current treatment regimens do not provide cure, the potential prognostic factors that are considered to influence the prognosis of the disease, i.e. the chance of recovery and treatment options include the following. | ||
*Cancer staging: [[TNM]] | *Cancer staging: [[TNM]] stage III (T1a: Tumor size 2 cm or less; N2: Metastasis in ipsilateral peribronchial and/or hilar lymph nodes and intrapulmonary nodes including involvement by direct extension; M0: No distant metastasis) and above has a bad prognosis on the progression of the disease. But absence of [[metastasIs]] in the brain at the time of diagnosis and limited stage disease may be positive prognostic indicators.<ref name="pmid17214347">{{cite journal| author=Brueckl WM, Herbst L, Lechler A, Fuchs F, Schoeberl A, Zirlik S et al.| title=Predictive and prognostic factors in small cell lung carcinoma (SCLC)--analysis from routine clinical practice. | journal=Anticancer Res | year= 2006 | volume= 26 | issue= 6C | pages= 4825-32 | pmid=17214347 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=17214347 }} </ref> | ||
*Age: Advanced age and young age at the time of diagnosis are considered as negative and favorable prognostic factors of the disease respectively.<ref name="pmid3015384">{{cite journal| author=Osterlind K, Andersen PK| title=Prognostic factors in small cell lung cancer: multivariate model based on 778 patients treated with chemotherapy with or without irradiation. | journal=Cancer Res | year= 1986 | volume= 46 | issue= 8 | pages= 4189-94 | pmid=3015384 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=3015384 }} </ref> | *Age: Advanced age and young age at the time of diagnosis are considered as negative and favorable prognostic factors of the disease respectively.<ref name="pmid3015384">{{cite journal| author=Osterlind K, Andersen PK| title=Prognostic factors in small cell lung cancer: multivariate model based on 778 patients treated with chemotherapy with or without irradiation. | journal=Cancer Res | year= 1986 | volume= 46 | issue= 8 | pages= 4189-94 | pmid=3015384 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=3015384 }} </ref> | ||
*Sex: While diseased males are associated with a worse survival, diseased females live significantly longer than diseased males.<ref name="pmid3015384">{{cite journal| author=Osterlind K, Andersen PK| title=Prognostic factors in small cell lung cancer: multivariate model based on 778 patients treated with chemotherapy with or without irradiation. | journal=Cancer Res | year= 1986 | volume= 46 | issue= 8 | pages= 4189-94 | pmid=3015384 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=3015384 }} </ref> | *Sex: While diseased males are associated with a worse survival, diseased females live significantly longer than diseased males.<ref name="pmid3015384">{{cite journal| author=Osterlind K, Andersen PK| title=Prognostic factors in small cell lung cancer: multivariate model based on 778 patients treated with chemotherapy with or without irradiation. | journal=Cancer Res | year= 1986 | volume= 46 | issue= 8 | pages= 4189-94 | pmid=3015384 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=3015384 }} </ref> |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Vendhan Ramanujam M.B.B.S [2]
Overview
The natural history of untreated small cell lung cancer (SCLC) is extremely poor, with median survival of only 2 months for stage IV SCLC and less than 3 to 4 months for tumors confined to the thorax.[1]
Natural history
Limited-stage disease
At the time of diagnosis, approximately 30% of patients with SCLC will have tumor confined to the hemithorax of origin, the mediastinum, or the supraclavicular lymph nodes. These patients are designated as having limited-stage disease, and most 2-year disease-free survivors come from this group. In limited-stage disease, median survival of 16 to 24 months with current forms of treatment can reasonably be expected. A small proportion of patients with limited-stage disease may benefit from surgery with or without adjuvant chemotherapy; these patients have an even better prognosis.
Extensive-stage disease
Patients with tumors that have spread beyond the supraclavicular areas are said to have extensive-stage disease and have a worse prognosis than patients with limited-stage disease. Median survival of 6 to 12 months is reported with currently available therapy, but long-term disease-free survival is rare.
Complications
Prognosis
Prognostic factors
Although for most patients with small cell carcinoma of lung the current treatment regimens do not provide cure, the potential prognostic factors that are considered to influence the prognosis of the disease, i.e. the chance of recovery and treatment options include the following.
- Cancer staging: TNM stage III (T1a: Tumor size 2 cm or less; N2: Metastasis in ipsilateral peribronchial and/or hilar lymph nodes and intrapulmonary nodes including involvement by direct extension; M0: No distant metastasis) and above has a bad prognosis on the progression of the disease. But absence of metastasIs in the brain at the time of diagnosis and limited stage disease may be positive prognostic indicators.[2]
- Age: Advanced age and young age at the time of diagnosis are considered as negative and favorable prognostic factors of the disease respectively.[3]
- Sex: While diseased males are associated with a worse survival, diseased females live significantly longer than diseased males.[3]
- Socioeconomic status: Most of the patients are from the lower socioeconomic status and are unmarried. They have a poor prognosis when it comes to disease progression.[4]
- Ethnicity: Hispanics and African Americas are significantly affected and they carry a poor prognosis. Asian ethnicity carry a favorable prognosis.[4]
- Performance status: Poor performance status is significantly associated with a reduced duration of survival.[3]
- Smoking: A positive smoking history is a well known and established independent poor prognostic factor for small cell carcinoma of the lung.
- Laboratory values: Albumin is another independent factor that can affect the prognosis of disease. Reduced hemoglobin concentration, and raised serum lactate dehydrogenase values have been demonstrated as factors that are associated with a significant reduction in the duration of survival following the disease.[3] A normal white blood cell count is the most powerful positive prognostic indicator among laboratory values.[2]
- Treatment: All treatment modalities like surgical resection,[5] radiation, and chemotherapy serve as favorable prognostic factors, contributing to the survival.[3]
References
- ↑ Green, Robert A.; Humphrey, Edward; Close, Henry; Patno, Mary Ellen (1969). "Alkylating agents in bronchogenic carcinoma". The American Journal of Medicine. 46 (4): 516–525. doi:10.1016/0002-9343(69)90071-0. ISSN 0002-9343.
- ↑ 2.0 2.1 Brueckl WM, Herbst L, Lechler A, Fuchs F, Schoeberl A, Zirlik S; et al. (2006). "Predictive and prognostic factors in small cell lung carcinoma (SCLC)--analysis from routine clinical practice". Anticancer Res. 26 (6C): 4825–32. PMID 17214347.
- ↑ 3.0 3.1 3.2 3.3 3.4 Osterlind K, Andersen PK (1986). "Prognostic factors in small cell lung cancer: multivariate model based on 778 patients treated with chemotherapy with or without irradiation". Cancer Res. 46 (8): 4189–94. PMID 3015384.
- ↑ 4.0 4.1 Ou SH, Ziogas A, Zell JA (2009). "Prognostic factors for survival in extensive stage small cell lung cancer (ED-SCLC): the importance of smoking history, socioeconomic and marital statuses, and ethnicity". J Thorac Oncol. 4 (1): 37–43. doi:10.1097/JTO.0b013e31819140fb. PMID 19096304.
- ↑ Gaspar LE, McNamara EJ, Gay EG, Putnam JB, Crawford J, Herbst RS; et al. (2012). "Small-cell lung cancer: prognostic factors and changing treatment over 15 years". Clin Lung Cancer. 13 (2): 115–22. doi:10.1016/j.cllc.2011.05.008. PMID 22000695.