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Objective: To analyze the clinical, imaging and pathological findings of congenital intrapulmonary lymphangioma and hemangioma in 5 infants and young children., Method: Data of 3 cases with congenital intrapulmonary lymphangioma and 2 cases with haemangioma were analyzed., Result: All the 5 cases had cough, difficulty in breathing, cyanosis of lips, and shortness of breath. Imaging study indicated cystic and space occupying changes of partial lung. In the two cases of hemangioma, the blood vessels passing through the hemangioma were observed on CT films. Histochemical studies showed that the cystic pockets from removed tissues were different in size and there was a line of flat endothelial tissue around these pockets. Immunochemical studies indicated D2-40 positive, factor VIII weak positive for lymphangioma cases; while in hemangioma cases, factor VIII was positive, D2-40 was negative or weakly positive, and both of cytokeratin was negative., Conclusion: It is very important to consider and identify congenital intrapulmonary lymphangioma or hemangioma when a patient has cystic pockets and space occupying change in their lung by imaging and pathological studies.

Objective: To study the clinicopathologic features and differential diagnosis of splenic lymphangioma., Methods: Eighteen cases of splenic lymphangioma were retrieved from the pathology archives during the period between January 1990 to December 2005. The clinicopathologic features were analyzed. Immunohistochemical study was performed on the paraffin sections of 16 cases., Results: The age of the patients ranged from 9 to 72 years (median = 40 years). Thirteen patients were males and 5 were females. Clinically, the tumor could be asymptomatic or present with abdominal symptoms and hypersplenism. Follow-up information was available in 13 patients (72.2%) and the duration varied from 5 months to 15 years. All 13 patients had an uneventful clinical course, with no evidence of residual disease, local recurrence or metastasis. Gross examination showed splenic enlargement. The tumor appeared as cystic (8/18), solid (5/18) or honeycomb mass (5/18), either solitary (5/18) or multifocal (13/18). Histologically, splenic lymphangioma could be subclassified as cavernous (9/18), cystic (5/18) or mixed (4/18). Immunohistochemical study showed that the positivity rates for CD9 and D2-40 were 100% and 43.8% respectively., Conclusions: Splenic lymphangioma is a rarely encountered entity that can be misdiagnosed as a splenic hemangioma. A definite diagnosis depends on pathologic examination.