Accessory thymus in cervical ectopy: A case report. Cervical tumors of
thymic origin are considered to be uncommon lesions in the differenti
al diagnosis of neck masses. They can be either cystic or solid. The a
uthors present one case of solid cervical thymic tumor in a 2 month-ol
d baby. The embryogenesis of the thymus explains the cervical location
of these tumors. Theories of physiopathology are presented. The clini
cal presentation is variable and their nature is often recognized only
upon surgery and preoperative pathologic examination. Some cases of t
hymoma and respiratory complications resulting from ectopic thymus hav
e been described in the literature, so that total excision of the mass
must be performed. This lesion may be more common than suggested in t
he literature.