Subcentimeter hypodense nodule on left thyroid lobe with coarse focus of calcification---subcentimeter left thyroid nodule. Non-specific in nature.

Thyroid nodules. Most nodules less than 1 cm are not concerning and can be monitored with periodic ultrasounds. Some features such as calcification may heighten concern. Much more information is necessary in your situation. Is there family history of thyroid cancer, personal history of hyper or hypothyroidism, and radiation exposure? You need to discuss this with an endocrinologist and arrange a treatment plan.