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F 54, GGO in LLL

F 54, GGO in LLL. Tumor cells grow along alveolar septa. Tumor cells grow along alveolar septa. Also note septal widening with sclerosis. There is a focus of alveolar collapse and loose myxoid tissue, suggestive of stromal invasion.

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F 54, GGO in LLL

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  1. F 54, GGO in LLL

  2. Tumor cells grow along alveolar septa.

  3. Tumor cells grow along alveolar septa. Also note septal widening with sclerosis.

  4. There is a focus of alveolar collapse and loose myxoid tissue, suggestive of stromal invasion.

  5. Invasion is characterized by significant increase in cytologic atypia, a fibroblastic reaction, and usually an acinar pattern of growth. Adenocarcinoma, well differentiated, with predominant non-mucinous “BAC” pattern

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