Epididymis inflammation (epididymitis). Light micrograph of a section through tissue from an inflamed epididymis. The epididymis is a coiled tube that lies on the testis, and this section has passed through one of these coils. The wall of the tube (pink) forms the oval shapes. The wall at centre left is thicker than its normal regular size, probably due to the inflammation. The epididymis connects to the testis and receives and stores sperm from the testis. It then passes the sperm on to the vas deferens. The cause of the inflammation is usually a bacterial infection, and is treated with antibiotic drugs. Magnification unknown.