HY USMLE Q #908 – Pathology

A 40-year-old woman comes to the physician for a 12-month history of fatigue, weight gain, and irregular menses. Vitals are: temperature 98.6F, HR 55, RR 12, BP 120/80. BMI is 25. During the interview she responds with short, quiet remarks and minimal eye contact. Which of the following additional findings is most likely to be seen in this patient?

  Apple green birefringence with Congo red stain
  Decreased serum cholesterol
  Decreased serum creatine kinase
  Decreased serum transaminases
  Lymphocytic infiltration