Hamartoma MRI

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Maria Fernanda Villarreal, M.D. [2]

Overview

MRI is the modality of choice for assessment of hypothalamic, spleen, kidney, and other abdominal hamartomas. On MRI, hamartoma is characterized by a heterogeneous signal in T1 and high signal due to fat and cartilaginous components in T2.

MRI

• MRI is the modality of choice for assessment of hypothalamic, spleen, kidney, and other abdominal hamartomas.
• T1: isointense to cerebral cortex
• T1 C+ (Gd): no contrast enhancement
• T2: iso to hyperintense to cerebral cortex, the higher the proportion of glial cells, the higher the T2 signal.
• MR spectroscopy
  • Reduced NAA/C
  • Increased myoinositol
  • Increased Cho/Cr compared to the amygdala has also been reported.

Gallery

Hypothalamic Hamartoma

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  MRI showing hypothalamic hamartoma(Images courtesy of RadsWiki)

Biliar Hamartomas

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  Biliary hamartomas(Images courtesy of RadsWiki)
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  Biliary hamartomas(Images courtesy of RadsWiki)
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  Biliary hamartomas(Images courtesy of RadsWiki)
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  Biliary hamartomas(Images courtesy of RadsWiki)