All are cavitating lesions in the lungs, except?: (A) Caplan's syndrome, (B) Hamaoma, (C) Wegner's granuloma, (D) Squamous cell carcinoma
Answer is B. Answer is B (Hamaoma): Hamaomas produce non cavitating popcorn calcifications. Malignant lesions (squamous cell carcinoma) and granulomatous lesions (Wegener's granulomatosis, Caplan's syndrome) are established causes of cavitatory lesions.