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Knee Arthritis Linked To Lung Cancer

Date:
September 4, 2007
Source:
BMJ Specialty Journals
Summary:
Arthritis of the knee may be the first sign of a type of lung cancer that is hard to treat in heavy smokers, suggests new research. The researchers reviewed the case notes of all patients with rheumatic disorders, diagnosed at one tertiary referral centre over six years.

Arthritis of the knee may be the first sign of a type of lung cancer that is hard to treat in heavy smokers, suggests research published ahead of print in the Annals of the Rheumatic Diseases.

The researchers reviewed the case notes of all patients with rheumatic disorders, diagnosed at one tertiary referral centre over six years.

Between 2000 and 2005, more than 6500 new patients attended the clinic. Of these, 296 (4.4%) were cases of monoarthritis--inflammation in just one joint--of the knee.

Among this group of patients, the knee arthritis, which was very mild, was the first sign of as yet undiagnosed non-small cell lung cancer in just under 2%.

All the patients were middle aged men, who had been heavy smokers for most of their lives.

But in every case, the lung cancer was operable, and once the cancerous tissue had been removed, the knee symptoms subsided.

Non-small cell lung cancer is linked to other conditions, which feature abnormal growths, in up to 20 per cent of cases, say the authors. And spread to the bones occurs in around one in five cases.

But the authors note that it has not so far been linked to arthritis.

Non-small cell lung cancer is particularly difficult to treat unless caught early, and in over half the cases diagnosed, the disease is already advanced.

Features that could act as early warning signs are therefore especially important, say the authors.

Reference: Isolated knee monoarthritis heralding resectable non-small cell lung cancer: a paraneoplastic syndrome not previously described Online First Ann Rheum Dis 2007; doi: 10.1136/ard.2007.075333


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The above story is based on materials provided by BMJ Specialty Journals. Note: Materials may be edited for content and length.


Cite This Page:

BMJ Specialty Journals. "Knee Arthritis Linked To Lung Cancer." ScienceDaily. ScienceDaily, 4 September 2007. <www.sciencedaily.com/releases/2007/09/070903204803.htm>.
BMJ Specialty Journals. (2007, September 4). Knee Arthritis Linked To Lung Cancer. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2007/09/070903204803.htm
BMJ Specialty Journals. "Knee Arthritis Linked To Lung Cancer." ScienceDaily. www.sciencedaily.com/releases/2007/09/070903204803.htm (accessed October 21, 2014).

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