1) solid nodule lying in the periphery of the lung and
2) linked to a bronchus (bronchus positive sign)
Answer: Adenocarcinoma
Adenocarcinoma of lungs tends to occur in peripheries in contrast to squamous or small cell lung cancers which tend to occur in the central locations. The 'positive bronchus' (also called 'bronchus positive') sign is also highly suspicious for lung cancer.
Reference:
Zacharopoulos G1, Adam A, Ind PW. - The positive bronchus sign in patients with known lung cancer - Eur J Radiol. 1990 Mar-Apr;10(2):130-3.
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