(Be ready to show students the 19-slide How Does an Ultrasonic Sensor Work? Presentation, a Microsoft Â® PowerPoint Â® file, to teach the lesson. In advance, make copies of the Ultrasonic Sensor Pre-Quiz and Ultrasonic Sensor Post-Quiz, one each per student, provided as attachments and slides.
Progression. Testicular cancer (specifically, germ cell tumors) is an aggressive cancer, doubling in size every 10 to 30 days. If not treated, testicular cancer can spread via the lymphatic pathways.The lymph glands around the aorta and the vena cava at the level of the kidneys are the first to be involved.n advanced cases it can spread to the lungs, liver, brain, bone, kidney, adrenal gland, and spleen. Without treatment, a testicular cancer patient will die on average 2-3 years from time of diagnosis.
Experts arenât sure why, but the number of new testicular cancer cases diagnosed each year (called incidence) has steadily increased over the last several decades. Testicular cancer is the most common cancer in men 15â29 years of age. The number of men diagnosed with testicular cancer is low before puberty, increases significantly after age 14, peaks around age 30 and then declines by age 60. Testicular cancer is more common in Caucasian men than in men of African or Asian ancestry. It occurs most often in men with a higher socio-economic status.