Hamartoma CT: Difference between revisions
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==Overview== | ==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.<ref name="pmid12376601">{{cite journal |vauthors=Gaerte SC, Meyer CA, Winer-Muram HT, Tarver RD, Conces DJ |title=Fat-containing lesions of the chest |journal=Radiographics |volume=22 Spec No |issue= |pages=S61–78 |year=2002 |pmid=12376601 |doi=10.1148/radiographics.22.suppl_1.g02oc08s61 |url=}}</ref><ref> Brant WE, Helms CA.(2007) Fundamentals of diagnostic radiology. Lippincott Williams & Wilkins.ISBN:0781765188</ref> | |||
<ref name="pmid12376601">{{cite journal |vauthors=Gaerte SC, Meyer CA, Winer-Muram HT, Tarver RD, Conces DJ |title=Fat-containing lesions of the chest |journal=Radiographics |volume=22 Spec No |issue= |pages=S61–78 |year=2002 |pmid=12376601 |doi=10.1148/radiographics.22.suppl_1.g02oc08s61 |url=}}</ref><ref> Brant WE, Helms CA.(2007) Fundamentals of diagnostic radiology. Lippincott Williams & Wilkins.ISBN:0781765188</ref> | |||
==CT== | ==CT== | ||
CT is far superior in detecting intralesional fat and calcification. The reported prevalence of calcification in hamartomas on CT varies from 5 to 50% while fat may be identified in up to 60% of hamartomas at CT. The fat components may be localized or generalized within the nodule. | |||
Fat can be recognised by comparing it to subcutaneous fat, and will typically have a Hounsfield measurement of -40 to -120 HU. Presence of fat in a well circumscribed solitary pulmonary nodule which does not demonstrate significant growth is essentially pathognomonic of a pulmonary hamartoma and no further investigations are required 7. Unfortunately fat can only be identified in 60% of lesions. Thin section CT is therefore essential to avoid missing small foci of fat. Calcification is typically dispersed in the form of multiple clumps throughout the lesion in a popcorn configuration. | |||
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Revision as of 22:34, 8 January 2016
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Hamartoma CT On the Web |
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American Roentgen Ray Society Images of Hamartoma CT |
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.[1][2]
CT
CT is far superior in detecting intralesional fat and calcification. The reported prevalence of calcification in hamartomas on CT varies from 5 to 50% while fat may be identified in up to 60% of hamartomas at CT. The fat components may be localized or generalized within the nodule.
Fat can be recognised by comparing it to subcutaneous fat, and will typically have a Hounsfield measurement of -40 to -120 HU. Presence of fat in a well circumscribed solitary pulmonary nodule which does not demonstrate significant growth is essentially pathognomonic of a pulmonary hamartoma and no further investigations are required 7. Unfortunately fat can only be identified in 60% of lesions. Thin section CT is therefore essential to avoid missing small foci of fat. Calcification is typically dispersed in the form of multiple clumps throughout the lesion in a popcorn configuration.
References
- ↑ Gaerte SC, Meyer CA, Winer-Muram HT, Tarver RD, Conces DJ (2002). "Fat-containing lesions of the chest". Radiographics. 22 Spec No: S61–78. doi:10.1148/radiographics.22.suppl_1.g02oc08s61. PMID 12376601.
- ↑ Brant WE, Helms CA.(2007) Fundamentals of diagnostic radiology. Lippincott Williams & Wilkins.ISBN:0781765188