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The adenocarcinoma is positive for TTF-1 and napsin. EGFR/ALK testing was ordered. | The adenocarcinoma is positive for TTF-1 and napsin. EGFR/ALK testing was ordered. | ||
</pre> | </pre> | ||
====Lepidic pattern on biopsy==== | |||
<pre> | |||
Lung, Left Upper Lobe, Core Biopsy: | |||
- ADENOCARCINOMA, lepidic pattern. | |||
Comment: | |||
The tumour is stains as follows: | |||
POSITIVE: TTF-1, napsin A, CK7. | |||
NEGATIVE: p40. | |||
The findings are in keeping with lepidic pattern adenocarcinoma. The differential diagnosis includes: (1) adenocarcinoma in situ, (2) lepidic pattern adenocarcinoma, and (3) invasive adenocarcinoma. | |||
Lung biomarkers (EGFR, ALK, PDL1, ROS1) have been ordered. | |||
</pre> | |||
=====Mucinous adenocarcinoma with noncontributory stains===== | =====Mucinous adenocarcinoma with noncontributory stains===== |
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