Association between progressive systemic sclerosis (PSS) and lung malignancy is rare yet well recognised. In order of frequency bronchioloalveolar carcinoma (BAC) is most common followed by squamous cell carcinoma, oat cell carcinoma, anaplastic carcinoma of lung. We present a 55 year old non-smoker male patient with PSS, who presented to us with progressively increasing shortness of breath and dry cough. Initially clinico-radiologically he was provisionally diagnosed as a case of non-resolving pneumonia. Subsequent investigations revealed it is a case of squamous cell carcinoma of lung with PSS.
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