carcinosis

Carcinomatosis is often restricted to tumors of epithelial origin, adenocarcinomas, while sarcomatosis describes the dissemination of tumors of mesenchymal origin, sarcomas.{{cite journal|last1=Oei|first1=T. N.|last2=Jagannathan|first2=J. P.|last3=Ramaiya|first3=N.|last4=Ros|first4=P. R.|title=Peritoneal Sarcomatosis Versus Peritoneal Carcinomatosis: Imaging Findings at MDCT|journal=American Journal of Roentgenology|volume=195|issue=3|year=2010|pages=W229–W235|issn=0361-803X|doi=10.2214/AJR.09.3907|pmid=20729420}}

When most tumors metastasize to the lung, they form distinct nodules, but about 7% spread through the lymph vessels of the lung.{{cite journal |last1=Prakash| first1=P. |last2=Kalra |first2=M. K. |last3=Sharma |first3=A. |last4=Shepard |first4=J.-A. O. |last5=Digumarthy |first5=S. R. |title=FDG PET/CT in Assessment of Pulmonary Lymphangitic Carcinomatosis|journal=American Journal of Roentgenology |volume=194 |issue=1 |year=2009 |pages=231–236 |issn=0361-803X |doi=10.2214/AJR.09.3059 | pmid=20028927 }} They may impair breathing in several ways; the lung becomes stiffer; blood vessels traveling alongside the distended lymph vessels become compressed.{{cite book |author=Mark A. Marinella |title=Handbook of Cancer Emergencies |chapter-url=https://books.google.com/books?id=SylbZo97FCkC&pg=PA55 |accessdate=29 February 2012 |date=7 May 2009 |publisher=Jones & Bartlett Learning |isbn=978-0-7637-6989-5 |pages=55–57 |chapter=12. Lymphangitic carcinomatosis }}

A pattern of multiple small nodular metastases has been described as miliary carcinosis which has a radiographic appearance similar to miliary tuberculosis.{{cite journal |last1=Marks |first1=J. L. |title=Metastatic Tumors of the Lung |journal=Chest |volume=17 |issue=1 |year=1950 |pages=63–73 |issn=0012-3692 |doi=10.1378/chest.17.1.63 |pmid=15399335 }}

Any potential space may be seeded with tumor cells that grow along surfaces, but which may not invade below the surfaces. In rare cases, the joint spaces are affected.{{cite journal |last1=Currall |first1=Verity A. |last2=Dixon |first2=John H. |title=Synovial Metastasis |journal=The Journal of Arthroplasty |volume=23 |issue=4 |year=2008 |pages=631–636 |issn=0883-5403 |doi=10.1016/j.arth.2007.04.034|pmid=18514889 }}

File:Intestines with peritoneal carcinomatosis from gastric cancer.jpg, appearing as a grainy serosal surface]]

{{Main|Peritoneal carcinomatosis}}

The lining of the abdominal cavity is a common site for surface dissemination. Ovarian carcinomas are common. Fluid produced by the cells can produce ascites which is typical in carcinomatosis, but less common in peritoneal sarcomatosis. Fluid can be serous as seen in primary peritoneal carcinoma or mucinous such as found in pseudomyxoma peritonei which is typically a tumor derived from the appendix.{{cite journal |last1=Young |first1=Robert H. |title=Pseudomyxoma peritonei and selected other aspects of the spread of appendiceal neoplasms |journal=Seminars in Diagnostic Pathology |volume=21 |issue=2 |year=2004 |pages=134–150 |issn=0740-2570 |doi=10.1053/j.semdp.2004.12.002 |pmid=15807473}}

Pleural carcinosis is associated with malignant pleural effusion and poor prognosis.{{cite journal|last1=Ruffini|first1=E|title=The significance of intraoperative pleural effusion during surgery for bronchogenic carcinoma|journal=European Journal of Cardio-Thoracic Surgery|volume=21|issue=3|year=2002|pages=508–513|issn=1010-7940|doi=10.1016/S1010-7940(01)01166-6|pmid=11888772|doi-access=free}}

The meningeal covering of the central nervous system may be the site of tumor growth. Breast cancer, lung cancer and melanoma are the most common tumors.{{cite journal |last1=Martins |first1=Sandro José |last2=Azevedo |first2=Carla Rameri Alexandre Silva de |last3=Chinen |first3=Ludmilla Thomé Domingos |last4=Cruz |first4=Marcelo Rocha Sousa |last5=Peterlevitz |first5=Marcos Aurélio |last6=Gimenes |first6=Daniel Luiz |title=Meningeal carcinomatosis in solid tumors |journal=Arquivos de Neuro-Psiquiatria |volume=69 |issue=6 |year=2011 |pages=973–980 |issn=0004-282X |doi=10.1590/S0004-282X2011000700024 |pmid=22297890 |doi-access=free }}

Colorectal cancer patients with peritoneal involvement can be treated with oxaliplatin- or irinotecan-based chemotherapy. Such treatment is not expected to be curative, but can extend the lives of patients.Joerg O W Pelz, Terence C. Chua, Jesus Esquivel, et al. BMC Cancer, Volume 10, Published - Dec 22 2010. https://jhu.pure.elsevier.com/en/publications/evaluation-of-best-supportive-care-and-systemic-chemotherapy-as-t-3 Some patients may be cured through hyperthermic intraperitoneal chemotherapy, but the procedure entails a high degree of risk for morbidity or death.

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• [http://www.cancer.gov/dictionary?CdrID=285963 Carcinosis] entry in the public domain NCI Dictionary of Cancer Terms

Category:Oncology