case_images: PMC6256313_01
case_images: Ultrasound evaluation revealed that the patient had a 24-mm x 18-mm,
  well-circumscribed nodule in the right thyroid lobe.
case_images: 10.1177_1179554918813535-fig1.jpg
case_images: PMC6256313_01_10.1177_1179554918813535-fig1.jpg
case_images: fig1-1179554918813535
case_images: Ultrasound evaluation revealed that the patient had a 24 mm x 18 mm low echo-level nodule in the right thyroid lobe (Figure 1).
case_images: The tumor nodule consisted of an apparently encapsulated mass measuring
  2.4 cm x 1.8 cm x 1.5 cm. The cut surface was bulging and showed glistening
  gray tissue.
case_images: 10.1177_1179554918813535-fig2.jpg
case_images: PMC6256313_01_10.1177_1179554918813535-fig2.jpg
case_images: fig2-1179554918813535
case_images: On section, the cut surface was bulging and showed glistening gray tissue (Figure 2).
case_images: (A) Frozen sections showed a well-circumscribed single nodule with an
  incomplete fibrous pseudocapsule, (B) suspicious pseudocapsule invasion was
  observed in small foci, and (C) some of the tumor cells were visibly
  enlarged and deeply stained.
case_images: 10.1177_1179554918813535-fig3.jpg
case_images: PMC6256313_01_10.1177_1179554918813535-fig3.jpg
case_images: fig3-1179554918813535
case_images: Suspicious pseudocapsular invasions were observed in small foci, but mitosis and necrosis were absent (Figure 3).
case_images: (A and B) Well-circumscribed and encapsulated thyroid leiomyoma in which the
  surrounding thyroid tissue showed hyperplastic follicles with sparse foci of
  lymphocytic infiltration of the intervening stroma. (C) A uniform tumor
  pattern consisting of intersecting fascicles of cells. (D) The tumor cells
  were positive for alpha-smooth muscle actin.
case_images: 10.1177_1179554918813535-fig4.jpg
case_images: PMC6256313_01_10.1177_1179554918813535-fig4.jpg
case_images: fig4-1179554918813535
case_images: A slightly diffuse lymphocytic infiltration was also observed in many fields of the tumor (Figure 4).