Most common metastasis producer for lung is BREAST
Pathoma
Lung metastasis is the more common than a primary lung cancer and its most common source is breast or colon carcinoma. You will see canon ball nodules on imaging. Seperated by space nodules. Search canon ball nodules gross looks similar to this image.
Carcinoid tumor is the most common primary lung tumor in CHILDREN. Could be a central or peripheral tumor but i think they would show a polyp like mass in the bronchus for carcinoid. https://www.webpathology.com/slides-13/slides/Lung_Neoplastic_Carcinoid_Gross1.jpg
Malignant mesothelioma some sort of asbestos exposure with the tumor encasing the lung like the other photo posted on the comments.
Pulmonary hamartoma umm well there's two of them in this photo, a hamartoma is usually just a single nodule.
Small cell carcinoma would be more centrally located not peripheral.
Random fact/connection to share: choriocarcinomas are rare, malignant trophoblastic tumors that can result in these type of cannon ball metastases to the lung.
It's stupid but it helps:
Bad boobs cut pulm
Breast, bladder, colon, prostate to lungs
submitted by โneonem(629)
I think metastasis was the best option here because there are multiple malignant neoplasms... primary cancers tend to start as a single mass in the tissue of origin. In the lung, metastases are more common than primary neoplasms.