Navigation Links
Risk Of Soft Tissue Sarcomas In Hereditary Retinoblastoma Survivors

A study by Ruth A. Kleinerman and his colleagues quantifies the risk of hereditary retinoblastoma survivors developing specific subtypes of soft tissue sarcomas and finds that// this risk persists for decades after the original retinoblastoma diagnosis.

The findings published in the January 3 issue of the Journal of the National Cancer Institute emphasizes the importance of regular medical surveillance for these patients, the authors say.

Retinoblastoma is a rare cancer of the retina that primarily affects children and is most often diagnosed before age 1. The disease can often be cured; 97 percent of retinoblastoma patients survive 5 years after diagnosis.

However, patients with hereditary retinoblastoma are at a high risk of developing another cancer, including soft tissue sarcomas. The increased risk of soft tissue sarcomas is attributed both to the mutation in the RB-1 gene that causes retinoblastoma and to the radiation treatment that most retinoblastoma patients received when treated decades ago. Radiation is used less frequently today because of the risk of second cancers.

The researchers at the National Cancer Institute in Bethesda, Md., studied a group of 963 1-year hereditary retinoblastoma survivors to better understand the risks for specific subtypes of soft tissue sarcomas. The patients were diagnosed between 1914 and 1984 at medical centers in New York and Boston and were followed for an average of 25.2 years. More than half of the patients were younger than 1-year-old when diagnosed, and most (88.2 percent) of the patients were treated with radiation.

A total of 69 soft tissue sarcomas were diagnosed in 68 hereditary retinoblastoma patients. The most common subtype was leiomyosarcoma, a cancer of smooth muscle cells that was diagnosed in 23 of the patients. Other frequently diagnosed sarcomas were fibrosarcoma (13 patients), malignant fibrous histiocytoma (12), rhabdomyosarcoma (8), and liposarcoma ( 3). The authors calculated that there was a 184-fold increase in soft-tissue sarcomas among hereditary retinoblastoma survivors compared with the general population and a 390-fold increase in cases of leiomyosarcomas.

Only 20 percent of the soft tissue sarcomas were diagnosed within 10 years of the retinoblastoma diagnosis; 45 percent of the sarcomas arose 30 or more years after diagnosis. In addition, 18 of the 23 (78 percent) leiomyosarcomas were diagnosed 30 or more years after the diagnosis of retinoblastoma. Almost all sarcomas were diagnosed in retinoblastoma survivors who had been treated with radiation. However, 18 of the 69 sarcomas developed outside the original radiation treatment field, and leiomyosarcoma was diagnosed more often outside the radiation field than in it.

The authors note that some of their calculations are based on few cases of these rare cancers. In addition, classification schemes for some sarcomas changed over the study period, so some cancer subtypes may have been classified differently depending on the year they were diagnosed.

"Given the excellent survival of retinoblastoma patients, it is important that survivors continue to undergo regular medical surveillance for sarcomas in their adult years," the authors write.

In an editorial, Anna Meadows, M.D., of The Children's Hospital of Philadelphia, highlights the advances in treatment for retinoblastoma in the last several decades, and she notes that some of these findings may be applicable only to patients who received treatments that are no longer used. "Improved treatment can be expected to reduce the incidence of soft tissue (and bone) sarcomas associated with radiation," Meadows writes.

"The importance of this [new] report lies in its emphasis on leiomyosarcoma, a tumor that occurs in RB-1 gene carriers whether or not they were treated with radiation and that can be expected to continue to occur in older survivors, who will require more careful follow-up."

Source-Eurekalert
SRI
'"/>




Related medicine news :

1. Free Tissue Transfer Effective in Treating Massive Skin Cancers
2. Tissue Transfer for Skin Cancer
3. Tissue Transfer For Treatment Of Massive Skin Cancers
4. Loss Of Brain Tissue Linked To Obesity
5. Low Cost Tissue Culture Vaccine For Encephalitis
6. Adult Stem Cells From Fat Tissues For Healing
7. Stem cell therapy for developing new trachea using Tissue engineering
8. A Novel Method For Measuring Interstitial Fluid Pressure In Cancer Tissues
9. Three In One Ultrasound Probe For 3-D Imaging Of Heart And Tissue Destruction Developed
10. Bisphenol A In Food Containers Has Adverse Effect On Brain Tissue
11. Lack Of Estrogen In Brain Tissue Of Women Can Lead To Alzheimers
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/27/2016)... (PRWEB) , ... May 27, 2016 , ... W.S. ... products, announced today that it has been recognized as one of the best small ... Badger was named as one of nine small businesses providing progressive benefits to new ...
(Date:5/27/2016)... , ... May 27, 2016 , ... ... this installment is bolstered by inspiring human-interest stories, courtesy of awareness-driven celebrities and ... the industry, from leading advocates, associations and industry leaders such as Bioness. ...
(Date:5/27/2016)... New York, NY (PRWEB) , ... May 27, 2016 , ... ... bolstered by inspiring human interest stories, which come courtesy of leaders in the nursing ... within the industry, from leading advocates and associations—namely Abilene Christian University. , As ...
(Date:5/26/2016)... ... ... There are many ways to cook a hot dog, but new research commissioned ... dogs straight off the grill. Of the 90 percent of Americans who say they ... hot dog, far outpacing other cooking methods such as steaming (12 percent), microwaving (9 ...
(Date:5/26/2016)... ... May 26, 2016 , ... Georgia State University ... specialty academic programs. , Answering to the increasing demand for curricular specializations, the ... law, and environmental and land use law. ,  , “The demand for lawyers ...
Breaking Medicine News(10 mins):
(Date:5/26/2016)... PUNE, India , May 26, 2016 ... pain drugs market growth is the emergence of new ... developing astaxanthin therapies for osteoarthritis treatment. The therapy is ... market. Moreover, Arthritis Research UK is conducting studies to ... the arcOGEN study, where the genes involved in osteoarthritis ...
(Date:5/25/2016)... PUNE, India , May 25, 2016 ... "Medical Animation Market by Type (3D, 2D, 4D), by ... Patient Education), by End User (Medical Device Manufacturers, Hospitals/ ... report studies the global Medical Animation Market for the ... expected to reach USD 301.3 Million by 2021 from ...
(Date:5/25/2016)... 2016 According to market research ... and Demand Forecast to 2022 - Industry Insights by ... published by P&S Market Research, the global insulin delivery ... and it is expected to grow at a CAGR ... pump segment is expected to witness the fastest growth ...
Breaking Medicine Technology: