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.
Some of the symptoms that can point to hypothyroidism, Hashimotoâs disease, hyperthyroidism, Gravesâ disease, various types of thyroiditis, and thyroid cancer include: An enlarged neck. Palpable enlargement in the thyroid gland itself (goiter) A visible or palpable lump or lumps in your neck. Feeling of a lump in your throat when swallowing. A sore throat. Pain or tenderness in the neck. Your neck or throat feels sensitive, and ties, scarves, or turtlenecks donât feel comfortable.