title: [Thymoma in childhood. A case report and review of literature].
abstract: BACKGROUND
  Mediastinal tumours in children are rare. Around 25% of them can be malignant. The thymoma is an uncommon neoplasm, and during adulthood it corresponds to 30% of anterior mediastinum tumours. The peak incidence is between 55-65 years.
  
  
  METHODS
  A case of lymphocytic thymoma case is reported in a 4 year old patient with no previous or associated symptomatology. There was only a volume increase on the anterior neck region. The neck radiography and neck and chest tomography confirmed an anterior mediastinal mass surrounding the aorta and vena cava, as well as multiple mediastinal lymph nodes
  
  
  CONCLUSIONS
  Early diagnosis and complete resection are the basis for management and prognosis.
authors.affiliation: Servicio de Cirugía, Centro Médico Ecatepec, Instituto de Seguridad Social del Estado de México (ISSEMyM), Ecatepec, Estado de México, México. Electronic address: anis3791@hotmail.com.
authors.forename: Ana Lilia
authors.initials: AL
authors.lastname: Nolasco-de la Rosa
authors.affiliation: Servicio de Cirugía, Centro Médico Ecatepec, Instituto de Seguridad Social del Estado de México (ISSEMyM), Ecatepec, Estado de México, México.
authors.forename: Roberto
authors.initials: R
authors.lastname: Mosiñoz-Montes
authors.affiliation: Servicio de Cirugía, Centro Médico Ecatepec, Instituto de Seguridad Social del Estado de México (ISSEMyM), Ecatepec, Estado de México, México.
authors.forename: Luis Alberto
authors.initials: LA
authors.lastname: Nuñez-Trenado
authors.affiliation: Servicio de Cirugía, Centro Médico Ecatepec, Instituto de Seguridad Social del Estado de México (ISSEMyM), Ecatepec, Estado de México, México.
authors.forename: Edgardo
authors.initials: E
authors.lastname: Román-Guzmán
authors.affiliation: Servicio de Cirugía, Centro Médico Ecatepec, Instituto de Seguridad Social del Estado de México (ISSEMyM), Ecatepec, Estado de México, México.
authors.forename: Christian Ezequiel
authors.initials: CE
authors.lastname: Chávez-Villicaña
authors.affiliation: Servicio de Cirugía, Centro Médico Ecatepec, Instituto de Seguridad Social del Estado de México (ISSEMyM), Ecatepec, Estado de México, México.
authors.forename: Guillermo
authors.initials: G
authors.lastname: Naranjo-Hernández
mesh_terms: D017668:Age of Onset; D002675:Child, Preschool; D005260:Female; D006801:Humans; D015994:Incidence; D008197:Lymph Node Excision; D009367:Neoplasm Staging; D013945:Thymoma / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000473:pathology / Q000601:surgery*; D013953:Thymus Neoplasms / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000473:pathology / Q000601:surgery*; D014057:Tomography, X-Ray Computed
keywords: Masaoka; Mediastinal; Mediastino; Thymoma; Timoma