I believe they mean that the random variables have a common support. For example, if X ~ Unif[0,2] and Y ~ Unif[1,3], then their respective PDF's overlap in the interval [1,2], meaning the only interval where both X and Y can have common values is [1,2]. To illustrate, below is a representation of the supports of X and Y, below which is a representation of the real line.
1 Thyroid cancer is a malignant tumor of the thyroid gland. 2  Symptoms of thyroid cancer include swelling in the neck (goiter), neck pain, hoarseness, swallowing and breathing problem, swollen lymph gland in the neck.
Other symptoms of swollen glands include: 1  Tenderness or pain when you press on them. 2  Symptoms of the underlying infection such as fever, sore throat, and mouth sores. 3  Red, warm, swollen skin over the lymph node.ou're probably already familiar with the lymph nodes in your neck, but there are hundreds of other lymph nodes scattered throughout your body. Other areas where you may be able to feel swollen lymph nodes include: 1  Behind the ears. 2  Under the jaw. 3  Lower part of the back of the head.