My thyroid nodule report says rare macrophages and colloid consistent with follicular lesion of undetermined significance. Foll...lesion can't exclude?

Follow advice of end. Your Endocrinologist can guide you best. Your biopsy appears to be inadequate to make a definite diagnosis. Future follow up with an endocrinologist is advised so that your thyroid can be monitored for any further growth of this nodule which is easy to do with an ultrasound.