Hamartoma CT

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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

CT scan may be helpful in the diagnosis of hamartoma. Findings on CT scan suggestive of hamartoma include smooth edge, focal collections of fat, or collections of fat alternating with foci of calcification.

CT

• On computed tomography, common findings of pulmonary hamartoma, include:

• Isodense or hypodense solid masses
• Heterogeneous contrast enhancement relative to adjacent normal parenchyma
• Presence of fat in a well circumscribed solitary pulmonary nodule which does not demonstrate significant growth
• The fat components may be localized or generalized within the nodule and will typically have a Haunsfield measurement of -40 to -120 HU
• Calcification is typically dispersed in the form of multiple clumps throughout the lesion in a popcorn configuration

• On computed tomography, spleen hamartoma findings, include:

• Isodense or hypodense solid masses
• Heterogeneous contrast enhancement relative to adjacent normal parenchyma

• On computed tomography, common findings of renal hamartoma, include:

• Lesions involve the cortex and demonstrate macroscopic fat (less than -20 HU)
• Small renal hamartomas volume averaging may make differentiation from a small cyst difficult
• Renal hamartomas are are fat-poor
• Calcification is rare

• On computed tomography, common findings of hypothalamic hamartoma, include:

• Iso-attenuating nodule of soft tissue
• Calcification is rare
• There is no contrast enhancement

Gallery

• 
  CT scan (CT) shows a well circumcised lesion, with intralesional fat and calcification "popcorn-like appearance" adjacent to the hilum.
• 
  CT scan (CT) shows an isodense solid mass in the inferior pole of the spleen.