Navigation Links
Benefit of PET and PET/CT in ovarian cancer is not proven
Date:8/8/2012

Due to the lack of studies, there is currently no proof that patients with ovarian cancer can benefit from positron emission tomography (PET) alone or in combination with computed tomography (CT). As regards diagnostic accuracy, in certain cases, recurrences can be detected earlier and more accurately with PET or PET/CT than with conventional imaging techniques. This is the conclusion of the final report by the German Institute for Quality and Efficiency in Health Care (IQWiG) in Cologne that was published on 23 May 2012.

More reliable diagnosis is supposed to improve treatment

Ovarian cancer is the fifth most common malignant tumour in women. Every year 15.9 women in every 100,000 are diagnosed with the disease in Germany and it claims the lives of 8 in 100,000 women per year. Since the ovaries lie deep in the abdomen and an ovarian tumour normally causes no symptoms for a long time, it is often only discovered at a late stage.

Many experts hope that an investigation using PET or PET/CT alone or in combination with other methods would be better able to distinguish between benign and malignant tumours when ovarian cancer is suspected. It could also help classify cancerous tumours into the correct stage, make it easier to assess whether they respond to treatment and to show earlier and with greater certainty whether a recurrence or secondary tumour (metastasis) has occurred. This information should then enable patients to be given better treatment recommendations.

Benefit for patients is crucial

IQWiG therefore searched the international literature for studies investigating the effects of diagnosis using PET or PET/CT on health aspects of direct relevance to patients. For example, the results of this research - and an appropriately tailored treatment - could contribute to patients having better chances of survival, spare them unnecessary operations or other diagnostic procedures, or improve their quality of life. However, the search for such studies was unsuccessful, so the question as to the patient-relevant benefit of PET or PET/CT had to remain unanswered.

PET can better detect recurrences in certain cases

In addition, IQWiG searched for studies in which the diagnostic accuracy and prognostic power of PET or PET/CT were compared with other diagnostic methods. The basic question is how often a PET investigation gives a correct result. On the one hand, it should overlook true, cancerous tumours as rarely as possible, but on the other, it should not awake any false suspicions.

The results of a total of 40 individual studies on this topic were evaluated. However, these studies permit a robust conclusion only in respect of the detection (or exclusion) of a recurrence, where PET or PET/CT appears to be more reliable than other methods. Nevertheless, it remains unclear whether this only applies to patients in whom symptoms (e.g. pain) have already occurred, or also to those in whom routine screening has shown an abnormal blood test result. This is because only very few studies give precise details on this point.

Inform patients fully about benefits and harms

Since even the above patients have not been investigated to determine whether the higher test accuracy of PET or PET/CT has positive effects on mortality, the burden of disease or the quality of life, IQWiG assumes that a patient-relevant benefit of PET or PET/CT is not proven. For instance, it is particularly questionable whether a recurrence detected by PET or PET/CT can actually be better treated - and the patient thereby has a noticeable advantage.

It is therefore essential that doctors fully inform their patients not only of the possible benefits in the form of an earlier diagnosis, but also of the possible harms. The latter can arise from an earlier start to second-line treatment associated with considerable side effects, but not with a prolongation of survival. Hence studies are urgently needed to investigate the patient-relevant benefit of PET or PET/CT in the diagnosis of ovarian cancers in direct comparison with conventional diagnostic techniques.


'/>"/>
Contact: Dr. Anna-Sabine Ernst
presse@iqwig.de
49-022-135-6850
Institute for Quality and Efficiency in Health Care
Source:Eurekalert

Related medicine news :

1. Tafamidis: Approval denotes proven added benefit
2. Heart failure patients with diabetes may benefit from higher glucose levels
3. Adding drug to standard chemotherapy provides no survival benefit for older lung cancer patients
4. Avastin No Benefit to Older Lung Cancer Patients: Study
5. Talking to Yourself Could Have Mental Benefits
6. Study examines benefit of follow-up CT when abdominal ultrasound inconclusive
7. Research examines when benefits of screening mammography outweigh the harms for women in their 40s
8. Study finds that patient education videos viewed before an operation may benefit patients
9. Everyday fish oil capsule may provide kidney-related benefits
10. Erectile dysfunction drug may benefit cardiac function in young patients with heart defects
11. Study shows benefit of new maintenance therapy for multiple myeloma
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/25/2016)... ... 25, 2016 , ... Casa Velas, an adults-only boutique hotel in Puerto Vallarta, ... its new wellness suites . The two 1,350 sq. ft. suites which debuted ... services and insuite amenities, from a custom soap selection and in-suite exercise kit to ...
(Date:5/25/2016)... , ... May 25, 2016 , ... America Walks ... Carol Reichbaum, M.S.L., M.S.P.A., of the University of Pittsburgh Graduate School of Public ... will enable Ms. Reichbaum and 24 other advocates from around the country to participate ...
(Date:5/25/2016)... ... May 25, 2016 , ... "FCPX LUT Intense allows ... your footage," said Christina Austin - CEO of Pixel Film Studios. , With ... and easily add stylish color grades to their footage. A LUT is a Lookup ...
(Date:5/25/2016)... ... May 25, 2016 , ... Consumer access to organic foods ... 2016, Kashi®, a maker of whole grain cereals and other plant-based foods, will introduce ... hard red winter wheat processed by Hesco/Dakota Organic Products. , The transitional designation ...
(Date:5/25/2016)... (PRWEB) , ... May 25, 2016 , ... Stern ... firm will be selling the device branded as Stern’s Real Time Monitoring ... to bedbugs to the hotel and motel industry, colleges for use in dormitories, shelters, ...
Breaking Medicine News(10 mins):
(Date:5/24/2016)... May 24, 2016 Een app ... zodat zij collectief patiënten kunnen behandelen, hun kennis kunnen ... idee achter de nieuwe en revolutionaire MDLinking App, ontwikkeld ... Nederlandse vaatchirurg dr. Hans Flu en oncologisch chirurg dr. ... inmiddels beschikbaar is, wordt op dinsdag 24 mei officieel ...
(Date:5/23/2016)... FLINT, Mich. , May 23, 2016 Diplomat ... the third annual Fellowship and Internship programs. The hands-on ... 12. The full-time, paid Fellowship ... Flint, Michigan . Fellows and interns are ... downtown Flint at the Riverfront ...
(Date:5/23/2016)... , May 23, 2016 ... Devices, Diagnostics and Monitoring, and Vision Care ... Which areas are going to grow at the fastest ... revenues to 2026, assessing data, trends, opportunities and prospects. ... charts, and graphs. Discover the most lucrative areas in ...
Breaking Medicine Technology: