Top 25 Pearls of Pulmonary Pathology Series. Max and Kevin discuss important points in diagnosing lung adenocarcinoma in 2020. In this case, the topic of mucinous adenocarcinoma of the lung is discussed. Link to Molecular Pearl Video: • Pattern 5 – Nodules, Adenocarcinoma (Top 2... Topic 2 Pear 3: Don’t order stains on mucinous adenocarcinoma carcinoma in the lung. Visit www.6patterns.org for more. Videos are for education and entertainment only and should not be used as medical advice.