According to the standards, CAP protocols are required for resected specimens of which condition?

The requirement for CAP (College of American Pathologists) protocols for resected specimens primarily pertains to invasive tumors, and in this case, it specifically includes in situ ductal carcinoma. This form of carcinoma is a non-invasive breast cancer where abnormal cells are contained within the ducts of the breast and have not spread to surrounding tissues.

Implementing CAP protocols for this condition ensures that there is a standardized method for evaluating these specimens, which is essential for accurate diagnosis, treatment planning, and patient management. The protocols provide guidelines regarding the collection, handling, and examination of tissue specimens, supporting quality assurance in pathology practices.

Invasive ductal carcinoma, while also requiring stringent protocols, is not the correct answer as the question specifically highlights the necessity related to in situ conditions. Other conditions like stage IV lung cancer and benign tumors typically do not require the same level of protocol adherence as defined by CAP protocols for resected specimens, as benign tumors usually do not pose the same diagnostic challenges or complexities that warrant such protocols. Hence, the requirement for CAP protocols is most relevant for in situ ductal carcinoma among the choices provided.