Congenital Vascular and Lymphatic Diseases.

Over the past several centuries, the integration of contemporary medical techniques and innovative technologies, like genetic sequencing, have played a pivotal role in enhancing our comprehension of congenital vascular and lymphatic disorders. Nonetheless, the uncommon and complex characteristics of these disorders, especially considering their formation during the intrauterine stage, present significant obstacles in diagnosis and treatment. Here, we review the intricacies of these congenital abnormalities, offering an in-depth examination of key diagnostic approaches, genetic factors, and therapeutic methods.

The role of key biomarkers in lymphatic malformation: An updated review.

The lymphatic system, crucial for tissue fluid balance and immune surveillance, can be severely impacted by disorders that hinder its activities. Lymphatic malformations (LMs) are caused by fluid accumulation in tissues owing to defects in lymphatic channel formation, the obstruction of lymphatic vessels or injury to lymphatic tissues. Somatic mutations, varying in symptoms based on lesions' location and size, provide insights into their molecular pathogenesis by identifying LMs' genetic causes. In this review, we collected the most recent findings about the role of genetic and inflammatory biomarkers in LMs that control the formation of these malformations. A thorough evaluation of the literature from 2000 to the present was conducted using the PubMed and Google Scholar databases. Although it is obvious that the vascular endothelial growth factor receptor 3 mutation accounts for a significant proportion of LM patients, several mutations in other genes thought to be linked to LM have also been discovered. Also, inflammatory mediators like interleukin-6, interleukin-8, tumor necrosis factor-alpha and mammalian target of rapamycin are the most commonly associated biomarkers with LM. Understanding the mutations and genes expression responsible for the abnormalities in lymphatic endothelial cells could lead to novel therapeutic strategies based on molecular pathways.

Malformación venolinfática con erosión ósea. Una afectación rara en estas lesiones / Venolymphatic malformation with bone erosion. An unusual affectation in these lesions

Paciente varón de 30 años que consultó por una lesión en el 5.° dedo del pie derecho con afectación cutánea del pulpejo y de todo el borde externo. Macroscópicamente se trataba de una lesión violácea con superficie queratósica de 1cm. En la radiografía simple se objetivó un aumento de partes blandas, de posible origen vascular. La resonancia mostró una lesión que erosionaba la cortical de la falange distal, de señal muy hiperintensa compatible con malformación vascular de bajo flujo. Se realizó extirpación de la lesión mediante amputación de la falange distal y a nivel histológico se observó una lesión formada por vasos de tipo venoso y tipo linfático que eran D2-40 positivos. En las malformaciones vasculares la participación cutánea, aunque sea mínima, puede esconder una importante afectación profunda. Cuando asientan sobre planos óseos hay que descartar la erosión de la cortical del hueso subyacente (AU)

A 30 year old male presented with a cutaneous lesion on the distal area of the 5th toe with involvement of the outer edges. Macroscopically, it was a 1cm violaceous and keratotic lesion. Radiography showed an increase in soft tissue, possibly due to a vascular lesion. MRI showed a hyper-intense signal with erosion of the distal phalanx compatible with a low-flow vascular malformation. The distal phalanx was amputated. Histopathology revealed a lesion formed by venous and D2-40 positive lymphatic vessels. This case highlights the fact that even minimal skin involvement in vascular malformations may conceal an important deeper lesion, such as erosion of the cortical bone (AU)

Linfangiectasia intestinal primaria como causa de hipoalbuminemia / Primary intestinal lymphangiectasia as a cause of hypoalbuminemia

La linfangiectasia intestinal primaria es una malformación congénita de los vasos linfáticos subserosos asociada a una enteropatía pierde-proteínas. La obstrucción del drenaje linfático del intestino origina una rotura de los vasos linfáticos intestinales con salida de linfa hacia la luz intestinal, lo que causa edemas por hipoproteinemia, inmunodeficiencia por hipogammaglobulinemia, linfopenia y esteatorrea. Presentamos el caso clínico de un lactante de 6 meses con infecciones graves, hipoalbuminemia, edemas y esteatorrea, en el que se confirmó el diagnóstico de linfangiectasia intestinal por biopsia intestinal y se descartó una causa desencadenante mediante otras pruebas complementarias (AU)

Primary intestinal lymphangiectasia is a congenital malformation of the subserosal lymph vessels associated to a protein-losing enteropathy. The obstruction of the lymphatic drainage of the intestine leads to a rupture of the intestinal lymph vessels in which the lymph spreads to the intestinal lumen, which causes hypoproteinemia-related edemas, hypogammaglobulinemia-related immunodeficiency, lymphocytopenia and steatorrhea. We present a clinical case of a lactating 6-months old infant with severe infections, hypoalbuminemia, edemas and steatorrhea in which an intestinal biopsy confirmed the diagnosis of intestinal lymphangiectasia and a triggering cause was ruled out with other complementary tests (AU)

Avaliação de linfangiomas cervicais fetais por ressonância magnética e correlação com achados ultrassonográficos / Evaluation of fetal cervical lymphangioma by magnetic resonance imaging and correlation with sonographic findings

OBJETIVO: Avaliar três casos de linfangioma cervical por ressonância magnética e correlacionar com os achados da ultrassonografia. MATERIAIS E MÉTODOS: Três pacientes com idade gestacional entre 24 e 35 semanas, com suspeita de higromas císticos cervicais fetais na ultrassonografia obstétrica de rotina, foram submetidas a ressonância magnética e, posteriormente, a nova ultrassonografia para correlação dos achados. Em ambos os métodos de imagem foram avaliadas as dimensões, a localização, o conteúdo e a extensão das lesões. RESULTADOS: Tanto a ultrassonografia quanto a ressonância magnética avaliaram de modo semelhante a localização, o tamanho e o conteúdo dos tumores. As três lesões localizavam-se na região cervical posterior e lateral. Quanto ao conteúdo, duas eram predominantemente císticas com finos septos em seu interior e uma era heterogênea. A extensão e invasão das estruturas adjacentes foram mais bem caracterizadas na ressonância magnética do que na ultrassonografia, demonstrando de forma adequada o acometimento do pavilhão auditivo do feto em um caso e do mediastino superior em outro. CONCLUSÃO: A ressonância magnética fetal pode ser um complemento útil da ultrassonografia em fetos portadores de linfangiomas, avaliando de forma mais precisa a extensão e invasão de estruturas vizinhas, permitindo melhor planejamento cirúrgico pós-natal.

OBJECTIVE: To evaluate three cases of cervical lymphangioma with magnetic resonance imaging and correlating with sonographic findings. MATERIALS AND METHODS: Three pregnant women between the 24th and 35th gestational weeks, with sonographic findings suggestive of fetal cystic hygroma, were submitted to magnetic resonance and subsequently to a new ultrasonography for correlation of imaging findings. Tumors size, location, content and extent were evaluated both at magnetic resonance imaging and ultrasonography. RESULTS: Findings regarding tumor location, size and content were similar for both methods. All the lesions were found in the posterior and lateral cervical space. As regards the tumors content, two of the lesions were predominantly cystic, with thin septations, and the other was heterogeneous. Lesions extent and adjacent structures invasion were better characterized by magnetic resonance imaging, with appropriate demonstration of invasion of the pinna in one case and invasion of the superior mediastinum in another. CONCLUSION: Fetal magnetic resonance imaging can be a useful adjuvant to obstetric ultrasonography in cases of lymphangioma because of its higher accuracy in the determination of these tumors extent and adjacent structures invasion, allowing a better postnatal surgical planning.