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Circulatory control of splenic hyperfunction in children with peripheral blood dyscrasia
Insights
Ligation of the splenic artery temporarily reduces spleen overactivity in children with hypersplenism. However, splenic function often returns, making it a temporary solution, not a cure for blood disorders.
Area of Science:
- Pediatric Surgery
- Hematology
- Immunology
Background:
- Hypersplenism, characterized by increased splenic activity, leads to peripheral cytopenias.
- Preserving splenic function is crucial in children due to the spleen's role in immunity.
Observation:
- Ligation of the splenic artery was performed on six children with hypersplenism and cytopenias.
- The procedure aimed to reduce splenic hyperfunction while retaining some splenic tissue.
Findings:
- Initial improvement in peripheral blood counts was observed in five patients.
- Hematologic derangements recurred in four patients, with two eventually requiring splenectomy.
- Regrowth of splenic remnants was confirmed by scintiscans, indicating incomplete vascular interruption.
Implications:
- Splenic artery ligation is a safe procedure that acutely decreases splenic overreactivity.
- The treatment is temporizing, not definitive, for hypersplenism.
- Graded reduction of splenic mass may offer a safer alternative to splenectomy, preserving immune function.
Abstract:
Ligation of the splenic artery was performed upon six children with a variety of peripheral cytopenias associated with hypersplenism to decrease splenic hyperfunction while preserving some splenic tissue. While this procedure initially improved the peripheral blood values in five patients--two patients with hereditary spherocytosis, one patient with idiopathic thrombocytopenic purpura, one patient with pyruvate-kinase hemolytic anemia and one patient with posthepatitic cirrhosis and splenomegaly--the hematologic derangement gradually recurred in four, necessitating eventual splenectomy in two. The sixth patient, an infant with histiocytosis-x, died soon after ligation of the splenic artery. Scintiscans of the spleen corroborated regrowth of the splenic remnant, principally the lower pole to which the vascular supply in the splenocolic ligament was not interrupted. Although ligation of the splenic artery is safe and promptly reduces splenic overreactivity, this operation can only be viewed as temporizing and not as definitive treatment of hypersplenism. On the other hand, in view of the protective function of the spleen against certain bacteria and protozoa, particularly in children with blood dyscrasia, the idea of achieving eusplenism or mild hyposplenism rather than asplenism by a graded reduction in the functional splenic mass through ischemic treatment of hypersplenism seems sound. Alternative methods of circulatory control, for instance, embolization of the splenic artery, of splenic function should be cautiously pursued.