Which of the following is the most likely explanation for a goiter in a patient whose iodine levels are normal?
A) high T3:T4 ratio
B) autoimmune stimulation of TSH receptors
C) hyper-secretion of TSH
D) hypo-secretion of RH
E) pituitary tumor
Which of the following is the most likely explanation for a goiter in a patient whose iodine levels are normal?
A) high T3:T4 ratio
B) autoimmune stimulation of TSH receptors
C) hyper-secretion of TSH
D) hypo-secretion of RH
E) pituitary tumor