I have done usgthyroid.normal thyroid and isthumus show diffusely altered heterogeneous echotexture. vascularity present.no lesion nor calcification.

Thyroid function?: Hi. What prompted the thyroid ultrasound? Sounds like no nodule, so thyroid cancer is not the issue here. Heterogeneous echo texture is non-specific, but certainly can be seen in Hashimoto's. Do you have normal thyroid function? Even if so, you could check TPO & thyroglobulin antibodies to see if there's evidence of autoimmune thyroiditis. Good luck!