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Adenoid Hypertrophy - Rads

last modified on: Fri, 04/07/2017 - 13:55

Adenoid Hypertrophy

  •  Also known as reactive lymphoid hypertrophy or more simply reactive lymph nodes
  •  Benign etiology - lymphoid proliferation in response to antigen exposure
  •  Often noted with other lymphadenopthy in the neck
  •  Retropharyngeal nodes are found from the skull base to the hyoid bone
  •  May grow to over 1 cm in size and deform the naso- or oropharynx
  •  On CT: non-contrast shows homogeneity with muscle density; contrast shows variable enhancement, most often minimal
  •  On MR: T1 shows homogeneous low to moderate signal; T2 shows homogeneous moderate signal; T1 post-contrast gives mild enhancement
  •  Most common in chldren and those under 30 years of age