It looks like the pics we have seen before in this link that you posted of a low grade cystadenocarcinoma of the oviduct:
https://www.backyardchickens.com/th...omas-in-laying-hens-graphic-pictures.1064118/
https://www.backyardchickens.com/th...omas-in-laying-hens-graphic-pictures.1064118/