J Korean Soc Radiol.  2018 Sep;79(3):171-174. 10.3348/jksr.2018.79.3.171.

Cystic Neck Mass in an Adult: Unusual Manifestation of a Mediastinal Mature Teratoma

• Lee YJ
• Jeong YJ
• Suh HB
• Kim HJ
• Lee BJ
• I HS
• Roh J
• Yeom JA

• KMID: 2418659
• DOI: http://doi.org/10.3348/jksr.2018.79.3.171

Abstract

Anterior mediastinal teratomas are congenital tumors containing derivatives of all three germ layers. They usually grow slowly and are often detected incidentally by imaging studies. We describe the case of a 38-year-old man with an anterior mediastinal teratoma extending to the anterior neck, which resulted in a cystic neck mass.

MeSH Terms

Adult*
Germ Layers
Humans
Mediastinal Neoplasms
Neck*
Teratoma*
Tomography, X-Ray Computed

Figure

• 

  Fig. 1 A 38-year-old man with an anterior mediastinal teratoma extending to the anterior neck. A. Chest radiograph shows right neck swelling (arrow) with widening of the right paratracheal stripe (arrowhead) and left tracheal deviation. B-D. Contrast-enhanced coronal (B) and axial (C, D) CT images show a well-defined, cystic and solid mass in upper mediastinum extending to the anterior neck. The solid component in upper mediastinum shows heterogeneous enhancement and fat component (arrows in B, C) and connects with a multi-septated cystic component in the anterior neck without fluid-fluid level (B). The cystic component compressed the right thyroid lobe without evidence of invasion (D). Trachea was deviated to the left side but without airway narrowing. E. Histological examination reveals a mass with normal skin tissue (arrows) in fibrous thymic capsule (arrowheads) (hematoxylin and eosin stain, × 12.5). F. Histological examination reveals normal skin adnexa, such as epidermis (white arrow), sebaceous gland and duct (arrowheads), hair follicles (black arrow), suggestive of normal skin tissue (hematoxylin and eosin stain, × 40).

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