Lymphocytic Interstitial Pneumonia Presenting With Haemoptysis and a Solitary Spiculated Pulmonary Nodule: A Case Report.

Lymphocytic interstitial pneumonia (LIP) is a rare disorder that typically presents with cystic changes on computed tomography. We report a distinctive case of a 53-year-old man with LIP whose sole presenting symptom was haemoptysis. Imaging revealed a solitary spiculated pulmonary nodule, highly suspicious for malignancy. Diagnosis was confirmed by surgical resection and histopathology, which demonstrated characteristic diffuse lymphoplasmacytic infiltration. This case underscores that LIP can masquerade radiologically as lung cancer and must be considered in the differential diagnosis of solitary pulmonary nodules, emphasising the indispensability of pathological confirmation.