PMC9578814_01
Ultrasound of the neck demonstrating 3.7 x 2.0 x 3.1 mm nodule in the right thyroid lobe.
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The thyroid was present; however, the ultrasound demonstrated a 3.7 x 2.0 x 3.1 mm nodule in the right lobe, which was interpreted as likely intrathyroidal ectopic thymic tissue (Figure 1).
Magnetic resonance imaging (T1 with contrast, (a) 3D MPRAGE, (b) T1 without contrast), and (c) of the head demonstrating a polypoid dorsal midline lingual mass.
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However, the tongue lesion was visualized (Figure 2).
(a) An histological section of lingual mass demonstrating a raised, broad-based polypoid lesion covered with stratified keratinizing epithelium with a central core of smooth muscle (hematoxylin and eosin stain, 2x original magnification). (b) An histological section of lingual mass demonstrating smooth muscle with the salivary gland and duct tissue with intervening adipocyte clusters (hematoxylin and eosin stain, 10x original magnification). (c) An histological section of lingual mass demonstrating smooth muscle with small, thick-walled vessels present (hematoxylin and eosin stain, 10x original magnification). (d) An histological section of lingual mass demonstrating transition between smooth muscle of leiomyomatous lesion and skeletal muscle of dorsal tongue (hematoxylin and eosin stain, 10x original magnification). (e) An histological section of lingual mass with smooth muscle actin stain (2x original magnification).
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Histological analysis revealed a raised, broad-based polypoid lesion covered with stratified keratinizing epithelium with a central core of smooth muscle (Figure 3(a)). Smooth muscle was visualized with small, thick-walled vessels, and mucinous salivary gland and ductal tissue, with clusters of adipocytes present within the intervening stroma, all adjacent to native lingual skeletal muscles (Figures 3(b)-3(d)). The smooth muscle actin staining was performed to further clarify the smooth muscle present in the lesion (Figure 3(e)).