Is a heterogeneously hypoechonic nodule 1.4x1.1x1.1cm thyroid nodule with microlobulated margins with no calcifications is a possible malignant one?

No definite answer.: There's no way to know from an ultrasound whether a thyroid nodule is malignant or benign. Don't be fooled by Radiologist - all imaging is limited in its ability to diagnose these conditions. The only way to tell for certain about malignancy is to undergo a biopsy. In the mean time, an iodine uptake-and-scan could help. You'll need blood tests & the help of an endocrinologist as well. Use HT Prime