Top 25 Pearls of Pulmonary Pathology Series. Max and Kevin show a case of poorly differentiated squamous cell carcinoma that mimics small cell carcinoma. Topic 5 Pear 3: Strict criteria should be used for diagnosing small cell carcinoma Link to AIS Discussion: • Pattern 5 – Nodules, Adenocarcinoma (Top 2... Visit www.6patterns.org for more. Twitter and Instagram @6Patterns. Videos are for education and entertainment only and should not be used as medical advice.