J Korean Assoc Pediatr Surg.  1996 Jun;2(1):64-67. 10.13029/jkaps.1996.2.1.64.

A Case of Aberrant Cervical Thymus in a One-year-old Boy

Affiliations
  • 1Department of Pediatric Surgery, Seoul National University Children's Hospital, Seoul, Korea.

Abstract

Aberrant migration of thymic tissue occurs as an ectopic thymus in the mediastinum, base of skull, tracheal bifurcation, and cervical region. A recent review of the literature by Nowak et al. showed over 70 reported cases of aberrant thymus or thymic cyst in patients who presented with primary neck masses. Authors experienced a case of ectopic cervical thymus and reviewed the literature. A one-year-old boy with left neck swelling which had been noticed since one month of age visited out patient clinic. Ultrasonography showed a well-defined cystic mass containing homogeneous, low-echogenic content locating in the lateral aspect of the left carotid sheath. Operation was performed under the impression of branchial cleft cyst. At surgery, a multiseptated, well-encapsulated, brownish and doughy mass which was extending into the vicinity of the carotid bifurcation with sland stalk-like portion ending between the hypoglossal nerve and external carotid artery was excised completely. The cut-surface showed homogenous solid mass, and on frozen section the tissue revealed a normal thymic histology. Postoperative ultrasonography showed bilateral thymus in the superior mediastinum. The patient has no immunologic problem and is doing well now.

Keyword

Thymus; Ectopic; Cervical; Children

MeSH Terms

Branchioma
Carotid Artery, External
Child
Frozen Sections
Humans
Hypoglossal Nerve
Male*
Mediastinal Cyst
Mediastinum
Neck
Skull Base
Thymus Gland*
Ultrasonography
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