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Rare Cancers and Associated Disorders
Cancer of Unknown Primary Site
Metastatic Cancer
Langerhan's Cell Histiocytosis
Mesothelioma
Carcinoid Tumors
Neurofibromatosis
Germ Cell Tumours
Desmoplastic Small Round Cell Tumour
Desmoid Tumour
Li-Fraumeni Syndrome
Malignant Rhabdoid Tumour -Non Renal
Ataxia-telangiectasia
Nijmegen Breakage Syndrome
Rothmund-Thomson Syndrome
There are well over a hundred different kinds of cancer, these include very rare types not covered in this guide. In addition there are a variety of "associated disorders", these may include a) diseases that are not cancerous but may be related to cancer /
cancer treatment, b) benign diseases that are often treated by oncologists, and c) benign diseases that may result in an increased risk of subsequently developing cancer.
Many types of cancer can spread to other parts of the body (the process of metastasis). Metastases are secondary tumours which have developed away from the original tumour site. The different sites that a cancer may spread to can depend on the type of
malignancy; for example neuroblastoma is often associated with bone metastases, while the lung is the most frequent site of metastases for bone tumours.
These tumours develop from germ cells. In the developing embryo germ cells migrate to the ovaries or testicles and form the ova (egg cells) or sperm cells. Germ cell tumours occur where these cells become cancerous. These tumours typically express high
levels of alphafetoprotein (AFP). Germ cell tumours are most common in children and young adults, there are different sub-types including endodermal tumours (mostly found in children), dysgerminoma, teratoma, and seminoma (young men).
The most common location of these tumours are the ovaries (in females) or testicles (in males). However, they can also develop in other parts of the body such as the sacrococcygeal region, brain, abdomen and other sites - this may occur when some of the
germ cells in the embryo did not migrate properly. For information on germ cell tumours of the brain see the section on brain tumours.
Note: germ cell tumours in children tend to be quite different to those in adults.
See also Childhood Germ Cell Tumours
See also Testicular Cancer (in adults)
See also Ovarian Cancer (in adults)
Li-Fraumeni syndrome is an autosomal-dominant condition which predisposes to a range of different types of cancer. Many members of Li-Fraumeni families
have a germline mutation of the TP53 gene. Compared to the general population people who inherit a mutant TP53 allele have a
25-fold increase in the chance of developing cancer by 50 yrs of age.
********** Information for Health Professionals ***********
- Li-Fraumeni Syndrome (University of Washington) part of the NCI funded Geneclinics.org site. Details of LFS, diagnosis, management, molecular biology, genetic counseling, resources, references etc.
- Li-Fraumeni Syndrome; LFS - Genetic information (OMIM, National Center for Biotechnology Information, USA)
See also TP53 gene
- Ataxia-telangiectasia (On-line Medelian Inheritance In Man, National Centre for Biotechnology Information, USA)
- Ataxia-Telangiectasia Children's Project, Inc. (USA) a non-profit organisation founded in 1993 to raise funds for international research into AT.The web site includes information for families and support providers, physicians and research scientists. Multilingual support.
- National Organization to Treat Ataxia-telangiectasia (USA) a national non-profit organisation founded in 1992 to raise funds for research. The web site includes information for families, in case of cancer, research, toll-free helpline etc.
********** Information for Health Professionals ***********
- Ataxia-Telangiectasia (University of Washington) part of the NCI funded Geneclinics.org site. Details of AT, diagnosis, management, molecular biology, genetic counseling, cancer risk, resources, references etc
- Medline Search: Ataxia-telangiectasia (PubMed)
Limit search to: [Last Year] Limit search to: [Last 2 Years]
Limit search to: [Reviews]
- Swift M, et al. Incidence of cancer in 161 families affected by ataxia-telangiectasia. N Engl J Med 1991 Dec 26;325(26):1831-6 Related articles (PubMed)
See also ATM gene
********** Information for Health Professionals ***********
- Nijmegen Breakage Syndrome (University of Washington) part of the NCI funded Geneclinics.org site. Details of NBS, diagnosis, management, molecular biology, genetic counseling, resources, references etc.
- Nijmegen Breakage syndrome (Online Mendelian Inheritance in Man, National Center for Biotechnology Information, USA)
- Nijmegen Breakage Syndrome Mutation Database (Virginia Mason Research Center, Washington, USA) includes information about NBS, references, tables of NBS1 gene mutations detected in NBS patients and a table of NBS1 polymorphisms/variants in non-NBS patients.
- Medline Search: Nijmegen breakage syndrome (PubMed)
Limit search to: [Last Year] Limit search to: [Last 2 Years]
Limit search to: [Reviews]
See also NBS Gene
See also RecQL4 Gene
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