I am a Rheumatologist at private practice in PR. I was consulted ...

I am a Rheumatologist at private practice in PR. I was consulted on a patient who is recently diagnosed as pneumonitis, biopsy report is compatible with pneumonitis and refers it could be hypersensitivity pneumonitis or collagen disease. The patient refers that after she started singulair she noticed swelling of hands and general malaise that dissapeared when she D/C it. This happened by the same time as the pneumonitis. Has pneumonitis been reported with Singulair?