There are certain brain tumors that are linked to Li Fraumeni Syndrome and one of these is Choroid Plexus Carcinoma.
The choroid plexus is within each ventricle in the brain. The plexus is a series of vessels and tissue that are responsible for making cerebrospinal fluid that takes impurities and waste away. Tumors that grow here can block the flow of fluid and cause hydrocephalus(swelling in the brain). Choroid plexus tumors are very rare, they make up less than 1% of all brain tumors. Yet, greater than 85% of choroid plexus tumors occur in children under the age of 5.
In 1993, there had only been 4 reported cases of choroid plexus in LFS families- but by a decade later a stronger correlation was seen. Sometimes it's the rare cases that prove to be insightful. In Brazil, researchers found 67% of choroid plexus carcinoma cases had mutations in the R337H TP53 gene and of those case 50% were Li-Fraumeni-Like(LFL) families.
In 2010, Dr.s Tabori and Schlien analyzed different TP53 mutations of choroid plexus tumors. They also proposed a new way to approach diagnosis and treatment of these rare tumors that takes the genetics into account. In an article published in the Journal of Clinical Oncology, their suggestion was
On the basis of the findings presented here, we suggest a new approach to the management of children and family members with CPC (Fig 3). At surgery, comprehensive family and clinical histories should be taken. If this information suggests the possibility of LFS, blood should be sent for TP53 sequencing and multiplex ligation-dependent probe amplification30 analysis. If the tumor is TP53 immunopositive, mutation analysis of the tumor is recommended. Negative staining and/or WT TP53 in the tumor would indicate that the patient should be offered an irradiation-sparing protocol. If the tumor is TP53 mutated, blood for germline TP53 sequencing should be sent. Because survival is poor for patients with TP53 dysfunctional tumors, novel therapies should be explored for these patients.
|Fig. 3, JCO April 20, 2010 vol. 28 no. 12 1995-2001|
American Brain Tumor Association
Journal of Pediatric Blood and Cancer Abstract
Gozali, A. E., Britt, B., Shane, L., Gonzalez, I., Gilles, F., McComb, J. G., Krieger, M. D., Lavey, R. S., Shlien, A., Villablanca, J. G., Erdreich-Epstein, A., Dhall, G., Jubran, R., Tabori, U., Malkin, D. and Finlay, J. L. (2012), Choroid plexus tumors; management, outcome, and association with the Li–Fraumeni syndrome: The Children's Hospital Los Angeles (CHLA) experience, 1991–2010. Pediatr. Blood Cancer, 58: 905–909. doi: 10.1002/pbc.23349
Journal of Clinical Oncology-
Choroid Plexus in Brazil
SV40 and Choroid Plexus Tumors