What invasion is considered pT2 stage and usually occurs secondary to hilar soft tissue invasion?

In the context of cancer staging, particularly when discussing tumor classifications, pT2 typically indicates a certain level of invasive growth of a tumor. For the specific question about invasion that is classified as pT2 stage and is often a result of hilar soft tissue invasion, the correct focus is on epididymal invasion.

Epididymal invasion involves the spread of cancer to the epididymis, the coiled tube that lies behind the testes and is involved in sperm maturation. This type of invasion suggests a significant extent of local tumor growth, often linked with underlying soft tissue involvement, such as hilar soft tissue invasion. Hilar soft tissue invasion plays a crucial role in the tumor's progression, allowing for this notable spread, which is characteristic of pT2 classification.

The other options, while they reflect various types of potential tumor invasions, do not specifically align with the context of being classified as pT2 or directly related to hilar soft tissue invasion in the same way that epididymal invasion does. Thus, the focus on the relationship between the pT2 classification and epididymal invasion is key here for understanding tumor behavior and staging.