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.
Symptoms of Hashimoto's Thyroiditis. Hashimoto's symptoms may be mild at first or take years to develop. The first sign of the disease is often an enlarged thyroid, called a goiter.The goiter may cause the front of your neck to look swollen. A large goiter may make swallowing difficult. Other symptoms of an underactive thyroid due to Hashimoto's may include: 1  weight gain. 2  fatigue. 3  paleness or puffiness of the face.he first sign of the disease is often an enlarged thyroid, called a goiter. The goiter may cause the front of your neck to look swollen. A large goiter may make swallowing difficult. Other symptoms of an underactive thyroid due to Hashimoto's may include: 1  weight gain. 2  fatigue.