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Case Reports
. 2020 May 21;10(2):174-178.
doi: 10.1080/20009666.2020.1749503.

Sudden onset polyarthritis as a paraneoplastic syndrome from non-small cell lung cancer

Keshav Poddar  1 , Leena Pathikonda  1 , Miguel Villamil  1
Affiliations
Case Reports

Sudden onset polyarthritis as a paraneoplastic syndrome from non-small cell lung cancer

Keshav Poddar et al. J Community Hosp Intern Med Perspect. .

Abstract

A 48-year-old male presented to the emergency room for 2 weeks of joint pain and swelling of his four extremities. His symptoms started suddenly and were quite debilitating. His hands, fingers, knees, and ankles were so swollen and painful that he was unable to get out of bed and had to use crutches to ambulate. He also complained of anorexia, nausea, and lack of energy over the past few months, but denied any other complaints. His only medical history was a traumatic left tibia fracture 1 year ago. The patient had a 30-pack year history of smoking tobacco and used marijuana daily. The patient recently had an arthrocentesis at an outside hospital which was non-diagnostic and showed no infection. Given his symptoms, a thorough rheumatic workup was ordered. The ESR and CRP were elevated. ANA, rheumatoid factor, HLA B27, HIV, hepatitis panel, TSH, T4, Coombs antibodies, gonorrhea, chlamydia, CCP, alpha 1 antitrypsin, parvovirus, fungal antibodies, and myeloperoxidase antibodies were all within the normal range. X-rays of the hands, knees, and ankles were ordered. The images showed diffuse joint swelling with no fractures, dislocations, or hardware mispositioning. It also showed tissue swelling in the fingers that could not exclude hypertrophic pulmonary osteoarthropathy. A chest x-ray revealed a large 8.5 cm oval mass in the right upper lobe. A follow-up CT revealed a massive right upper lobe lung mass concerning for malignancy versus fungal etiology. A CT guided biopsy of the mass was performed and revealed a poorly differentiated non-small-cell lung cancer, favoring adenocarcinoma. Further CT imaging revealed limited stage disease. During the hospitalization, the patient was provided with NSAIDs for his joint pain, which provided minimal benefit. There was little to no improvement in his joint swelling. Oncology was consulted and further evaluation in the outpatient setting was recommended to determine if he would be a surgical candidate and/or to decide the best chemotherapeutic regimen. This case demonstrates an unusual presentation of non-small-cell lung cancer and highlights the importance of maintaining malignancy on the differential diagnosis for sudden arthritis.

Keywords: Clubbing; bronchogenic carcinoma; hypertrophic osteoarthropathy; lung cancer; paraneoplastic.

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Conflict of interest statement

No potential conflict of interest was reported by the authors.

Figures

Figure 1.
Figure 1.
Swelling and pain of the hands, legs, and feet, as well as some new clubbing of all the fingers.
Figure 2.
Figure 2.
Laboratory workup.
Figure 2.
Figure 2.
(Continued)
Figure 3.
Figure 3.
Chest X-ray-large oval mass in right upper lobe may represent bulla or soft tissue mass.
Figure 4.
Figure 4.
CT chest with contrast.
See this image and copyright information in PMC

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