Testes may have various appendages since embryonic development. Appendix testis refers to a small appendage of testicular tissue. It is located on the upper portion of the testis. Appendix epididymis refers to a small portion of normal tissue above the epididymis. Reference: https://www.chop.edu/conditions-diseases/torsion-appendix-testis-and-appendix-epididymis#:~:text=The%20appendix%20testis%20is%20a,occurs%20when%20this%20tissue%20twists. Image via: https://www.auanet.org/education/auauniversity/education-products-and-resources/pathology-for-urologists/normal-histology-and-important-histo-anatomic-structures/testicular-appendages