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  • Q&A with Australian Health Practitioners

    What causes pulmonary nodules?

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  • Dr Naghmeh Radhakrishna

    Respiratory & Sleep Medicine Physician

    Dr Naghmeh Radhakrishna is a lung, allergy and sleep specialist. She graduated from Adelaide University in 2004 and completed her training in Melbourne. Her areas … View Profile

    There are two main types of pulmonary nodules: malignant (cancerous) and benign (noncancerous). The majority (>90%) of pulmonary nodules that are smaller than 2cm in diameter are benign.

    There are a number of causes for benign nodules. Many are due to inflammation in the lungs as a result of an infection or more widespread inflammation. The nodule may represent an active problem or it may be due scar tissue from a previous inflammation. Causes of benign lesions include:

    Infections

    Non-infectious causes eg. Sarcoidosis, rheumatoid arthritis

    Neoplasms (benign or malignant)

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