Discussion of Splenic hemangioma
- Most common benign primary neoplasm of the spleen.
- Prevalence at autopsy ranges from 0.3% to 14%
- Most often in adults from mid-30s to mid-50s years of age.
- Most hemangiomas are small lesions that are found incidentally and patients usually have no symptoms.
- Natural course of hemangiomas is slow growth
- Symptoms or complications, when present, occur late.
- Hemangiomas can become large and manifest as a palpable nontender mass in the left upper quadrant.
- Complications include rupture, hypersplenism, and malignant degeneration.
- Kasabach-Merritt syndrome (anemia, thrombocytopenia, and coagulopathy) has been reported in patients with large hemangiomas.
 Imaging Findings for Splenic hemangioma
- Usually a hemangioma appears as a solid mass with cystic spaces.
- On radiographs, the lesion may manifest as a mass in the left upper quadrant or as splenomegaly. Calcification, when present, appears as multiple small punctate calcifications or peripheral curvilinear calcifications.
- On sonograms, a hemangioma may manifest as a well-defined intrasplenic or pedunculated echogenic solid or complex cystic mass. Echogenic calcifications with acoustic shadowing may be present.
- On unenhanced CT scans, capillary hemangiomas appear as hypoattenuating or isoattenuating, well-marginated masses. Homogeneous and marked contrast enhancement occurs during intravenous administration of contrast material.
- The MR imaging appearance of splenic hemangiomas has been described as being similar to that of hepatic hemangiomas. Splenic hemangiomas are hypo- to isointense, compared with normal spleen, on T1-weighted images and hyperintense on T2-weighted images. Dynamic MR imaging after administration of gadopentetate dimeglumine has shown that splenic hemangiomas have three patterns of enhancement: (a) immediate homogeneous enhancement that persists, (b) early peripheral enhancement with uniform delayed enhancement, and (c) peripheral enhancement with centripetal progression but persistent enhancement of a central fibrous scar,
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 References for Splenic hemangioma
- Robert M. Abbott, Angela D. Levy, Nadine S. Aguilera, Luis Gorospe, and William M. Thompson. From the Archives of the AFIP: Primary Vascular Neoplasms of the Spleen: Radiologic-Pathologic Correlation. RadioGraphics 2004 24: 1137-1163.