I need help understanding an ultrasound report

[ibejoann]

I went to my Dr Monday morning with a very large painful mass on front left side of my neck.  I got the ultrasound report back in a form of a letter and I don't understand it.  It would so much easier if they would write this out for blonds. Here is the report:
Findings: Right thyroid lobe measures 4.9 x 1.5 x 2.0 cm and the left lobe measures 5.1 x 3.0 to 1.7 cm.  Right lobe is within normal limits without dominate lesion.  The left lobe shows a mostly cystic structure but with internal echoes and debris that measures 2.9 x 2.1 x 2.5 cm  Small lymph node is also noted in the left neck with does not appear to be abnormal.
Impression: Complex cystic structure in the let thyroid lobe
Comments: left thyroid cyst---see what the endocrinologist has to say.

Can someone tell me what does this mean?  Does this mean surgery?

[ibejoann]

I also just all my blood work back in today also. The ESR (SEDIMENTATION RATE) was 42, the T4 FREE is 1.19, T3 is 125, and the TSH is 1.63.

[Mark Lupo, M.D.]

Would recommend seeing an endocrinologist for ultrasound guided FNA biopsy of this cystic mass.  95% of these are benign and most do not require surgery.  Likely there was recent bleeding into a small pre-existing nodule or cyst.  This usually improves in 3-4 weeks.