Hello,
Bronchitis or lung disease with bilateral hilar
lymphadenopathy is generally not associated with asthma and your sister needs a full respiratory evaluation.
Chest X Ray is not a sensitive test, so a HRCT (
high resolution CT scan) will be required to see the lymph nodes in detail.
There are several conditions especially infections that present with enlarged lymph nodes and present with
shortness of breath (appears like asthma) and hence the requirement of a full check.
Lung function tests (pulmonary function tests) with diffusion capacity is required as well. A bronschopy may be required after the HRCT scan.
Blood tests: Complete hemogram, Liver function tests, ACE level, IgE, Urea
Creatinine, ANA, ANCA are also required.
A treatment plan can be decided only after these tests are done.
I hope that was useful.
Best Wishes.