Why is imaging of atypical hepatic hemangiomas important?
Why is imaging of atypical hepatic hemangiomas important?
Compared with the imaging features of typical hepatic hemangiomas, the imaging features of atypical hepatic hemangiomas have not been well studied or well described. Knowledge of the entire spectrum of atypical hepatic hemangiomas is important and can help one avoid most diagnostic errors.
Is it possible to misdiagnose atypical hemangiomas on Mr?
Unfortunately, not all hemangiomas have the typical appearance, and they can mimic metastases on routine MR imaging. These are generally referred to as atypical hemangiomas and can result in misdiagnosis and ultimately additional imaging, biopsy, and unnecessary costs.
What are differential diagnoses of liver hemangiomas?
The differential diagnosis of atypical hemangiomas of the liver includes a large variety of hepatic tumors. In this section, the differential diagnoses of only the most frequent atypical hemangiomas are considered. The differential diagnosis of hemangiomas with an echoic border includes all tumors surrounded by a hyperechoic rim.
How often does hepatic hemangioma occur in the population?
The prevalence of hemangioma in the general population ranges from 1%–2% (, 1) to 20% (, 2 ); the female-to-male ratio varies from 2:1 to 5:1. Because hepatic hemangiomas are frequent, are most often asymptomatic, and have a very low rate of complications, this lesion does not require surgical resection.
How to diagnose atypical small hemangiomas of the liver?
The hepatic hemangioma has an atypical T2 signal intensity (arrow) which is not as bright as cerebrospinal fluid as usually found in hepatic hemangiomas. The diagnosis of HH was made and regular follow up was indicated. After 2 years, these nodules showed the same size and enhancement on helical CT. DISCUSSION
Can a diffusion MRI detect a liver hemangioma?
The aim of this work was to evaluate the ability of Diffusion MRI using different b values in detection and characterization of liver hemangiomas in order to differentiate them from other focal hepatic lesions. Thirty one hemangiomas in 28 patients were examined with diffusion MR using different four b values: 200, 500, 800 and 1000 s/mm 2.
Unfortunately, not all hemangiomas have the typical appearance, and they can mimic metastases on routine MR imaging. These are generally referred to as atypical hemangiomas and can result in misdiagnosis and ultimately additional imaging, biopsy, and unnecessary costs.
The prevalence of hemangioma in the general population ranges from 1%–2% (, 1) to 20% (, 2 ); the female-to-male ratio varies from 2:1 to 5:1. Because hepatic hemangiomas are frequent, are most often asymptomatic, and have a very low rate of complications, this lesion does not require surgical resection.