What Does This Ultrasound Report Mean?

Ultrasound Result: I have bulky inhomogeneous thyroid. R/O nodule. Fullness of right parotid region. Previouslt I had a right hemidectomy. The right lobe remnant of the thyroid measures 1.6 x 0.8 x1.2 cm. The left lobe of the thyroid measures 5.2 x 2.1 x 2.3 cm and has a mildly, non-homogeneous internal echo pattern. The isthmus measures 0.3 cm in AP thickness The right parotid gland meansures 6.6 x 4.0 x 1.9 cm and has a homogeneous internal echo pattern. The left parotid gland measures 5.5 x 4.0 x 2.0 cm and has a homogeneous internal echo pattern. Several normal appearing lymph nodes are seen in the parotid glands. The largest measure 1.5 x 1.5 x 0.5 cm (right) and 1.1 x 0.8 x 0.6 cm (left) The submandibular glands appear unremarkable bilaterally. My blood levels are normal. Please can you help me understand why my thyroid gland is bulky. Do i have to be concerned? What is paratid gland? Is it different from thyroid gland. Thank you very much for your guidance.