ALK and bronchioloalveolar carcinoma: Other features have been found in cases with ALK rearrangements, whereby mixed subtype adenocarcinomas were the most common subtype, followed by the acinar predominant subtype, papillary predominant subtype [34], micropapillary and cribriform growth [35, 36], bronchioloalveolar carcinoma (BAC) and low-grade endobronchial mucoepidermoid carcinoma.