Bronchioloalveolar carcinoma (BAC) is an unusual subtype of lung cancer; medical oncologist Dr. Jack West reviews the evidence on the best systemic therapy to treat advanced, multifocal BAC.

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It's not uncommon for a question here to be about the a pathologist's terminology on a report that equivocates about whether a lesion is bronchioloalveolar carcinoma (BAC) or another form of adenocarcinoma, perhaps "well-differentiated adenocarcinoma", especially if it has a radiographic appearance of a hazy infiltrate or many small ground glass opacities.