Dear Dr. Dhia Hussain Al-Delemy, thank you for your informative and supportive answer. Warm regards.

Sabuj Das

Dear Dr. Jens Mittag, I am pleased to hear from you. From your answer, I've got some information needed for me. Thank you very much.

Sabuj Das

Dear Colleagues,

Let it be the hormone thyroxine. On the surface of thyrocytes there is a receptor for thyroxine, encoded by a gene. If there is a deletion of the TSH receptor, then the gene will be overexpressed to maintain equilibrium.

Although I have a patient with a genetic disorder who is not sensitive to thyroxine in the absence of a thyroid gland.

Dear Dr. Mikhail Shepetko,

Thank you for kind feedback. It's certainly useful to me. Again, you have shared your personal experience, that's impressive. Warm regards.

Sabuj Das