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Pediatric vascular tumors and malformations, comprising a broad category of lesions often referred to as vascular anomalies, are a heterogenous group of clinicopathologically distinct entities. Pathologists, clinicians, and radiologists have traditionally lumped these lesions under the generic term, hemangioma, sometimes qualified by modifiers, such as capillary or cavernous. Advances in unders...

Birthmarks are common and commonly ignored by patients and primary care doctors. Yet they sometimes represent significant vascular anomalies that require diagnosis and treatment. We summarize when and how to work up a variety of vascular anomalies.

Angiotensin-converting enzyme (ACE) inhibitors including quinapril could exert a protective effect on cardiovascular system through endothelial system in normoglycemic and diabetic rats. The present experimental work was designed to study the vascular reactivity of aortic ring segments isolated from streptozotocin (STZ)-diabetic rats treated for 4 weeks with nitro-L-arginine-methyl ester (L-NAM...

Increased understanding of the mechanisms of angiogenesis and lymphangiogenesis has provided a glimpse at some of the molecules involved in the pathophysiology of hemangiomas and vascular malformations. This review focuses on recent advances in our understanding of the mechanisms of angiogenesis/lymphangiogenesis and the differentiation of arterial, venous, and lymphatic vessels. We integrate t...

Vascular anomalies are lesions seen in all surgical disciplines, particularly in pediatric patients. Specialization in vascular anomalies involves a team effort, with the team consisting of plastic surgeons, general surgeons, neurosurgeons, pediatricians, interventional radiologists, dermatologists, ophthalmologists, otolaryngologists, hematologists, and pathologists. Inconsistent nomenclature ...

A 14-month-old girl was evaluated for noisy breathing and swallowing. An upper gastrointestinal barium swallow study showed a filling defect of the esophagus at the level of the aortic arch suggestive of a vascular ring (Figures 1 and 2). A chest computed tomography angiogram with 3-dimensional reconstruction (1-mm sections; Movies I and II in the onlineonly Data Supplement) showed a vascular r...

in this note we introduce the notion of weak mccoy rings as a generalization of mccoy rings, and investigate their properties. also we show that, if is a semi-commutative ring, then is weak mccoy if and only if is weak mccoy.

total anomalous pulmonary venous connection (tapvc) is an anomaly in which the pulmonary veins are directly connected to one of the systemic veins or drain into the right atrium. management of pulmonary hypertension after the total correction of this congenital cardiac anomaly is very important. unligation of the vertical vein in the supracardiac type of this anomaly can be a draining pathway f...