Quiste cervical del conducto torácico: reporte de un caso y revisión de la literatura / Cervical thoracic duct cyst: case report and review of the literatura

El quiste del conducto torácico en su porción cervical es una patología infrecuente con escasos casos reportados en la literatura mundial. Habitualmente, se presenta como un aumento de volumen blando e indoloro en la fosa supraclavicular izquierda, el cual puede generar sintomatología compresiva variable de las estructuras adyacentes. Presentamos el caso de una mujer de 76 años remitida a la consulta de otorrinolaringología por evidencia de una lesión quística en la fosa supraclavicular izquierda con estudio posterior concordante con quiste cervical del conducto torácico.

The cervical thoracic duct cyst is an infrequent entity, with only a few cases reported in the international literature. It usually presents as a painless swelling on the left supraclavicular fossa, that can generate symptoms due to compression of adjacent structures. We present the case of a 76-year-old women that was referred to otolaryngology due to a supraclavicular cyst, with subsequent diagnosis of cervical thoracic duct cyst.

The essential role of thoracic duct embolization in management of traumatic iatrogenic chylothorax.

This study aims to describe a case series of patients who underwent thoracic duct embolization (TDE) to treat traumatic iatrogenic chylothorax (TIC). Three patients were included: Case #1, a 49-year-old woman with follicular lymphoma developed a TIC following video-assisted thoracoscopic surgery to resect a solid right paravertebral mass and was treated with TDE using microcoils and N-butyl cyanoacrylate (NBCA) glue. Case #2, a 68-year-old man with cardiac amyloidosis developed a TIC following heart transplantation and was treated with TDE using microcoils and ethylene vinyl alcohol copolymer. Case#3: A 6-year-old patient with congenital heart disease developed a TIC following a Fontan procedure and was treated with TDE using NBCA glue. All lesions were identified during lymphangiography and TDE was successfully performed in all cases. TDE is a safe and valuable technique that provides minimally invasive treatment for TCI.

Este estudo objetiva descrever uma série de casos de pacientes submetidos a embolização do ducto torácico (EDT) para tratamento de quilotórax iatrogênico (QI). Três pacientes foram incluídos. Caso 1: um homem de 49 anos com linfoma folicular apresentou QI após ressecção de uma massa paravertebral por toracoscopia vídeo-assistida e foi submetido a EDT com micromolas e n-butil-cianoacrilato (NBCA). Caso 2: um homem de 68 anos com amiloidose cardíaca apresentou QI após ser submetido a transplante cardíaco e foi submetido a EDT com micromolas e copolímero de etileno e álcool vinílico. Caso 3: um paciente de 6 anos com malformação cardíaca congênita apresentou QI após cirurgia de Fontan e foi submetido a EDT com NBCA. Todas as lesões foram identificadas durante a linfangiografia, e a EDT foi realizada com sucesso. A EDT é uma técnica segura e valiosa, que pode oferecer um tratamento minimamente invasivo em casos de QI.

Outcomes of Chylothorax Nonoperative Management After Cardiothoracic Surgery: A Systematic Review and Meta-Analysis.

INTRODUCTION: Chylothorax after thoracic surgery is a severe complication with high morbidity and mortality rate of 0.10 (95% confidence interval [CI] 0.06 - 0.02). There is no agreement on whether nonoperative treatment or early reoperation should be the initial intervention. This systematic review and meta-analysis aimed to evaluate the outcomes of the conservative approach to treat chyle leakage after cardiothoracic surgeries. METHODS: A systematic review was conducted in PubMed®, Embase, Cochrane Library Central, and LILACS (Biblioteca Virtual em Saúde) databases; a manual search of references was also done. The inclusion criteria were patients who underwent cardiothoracic surgery, patients who received any nonoperative treatment (e.g., total parenteral nutrition, low-fat diet, medium chain triglycerides), and studies that evaluated chylothorax resolution, length of hospital stay, postoperative complications, infection, morbidity, and mortality. CENTRAL MESSAGE: Nonoperative treatment for chylothorax after cardiothoracic procedures has significant hospital stay, morbidity, mortality, and reoperation rates. RESULTS: Twenty-two articles were selected. Pulmonary complications, infections, and arrhythmia were the most common complications after surgical procedures. The incidence of chylothorax in cardiothoracic surgery was 1.8% (95% CI 1.7 - 2%). The mean time of maintenance of the chest tube was 16.08 days (95% CI 12.54 - 19.63), and the length of hospital stay was 23.74 days (95% CI 16.08 - 31.42) in patients with chylothorax receiving nonoperative treatment. Among patients that received conservative treatment, the morbidity event was 0.40 (95% CI 0.23 - 0.59), and reoperation rate was 0.37 (95% CI 0.27 - 0.49). Mortality rate was 0.10 (95% CI 0.06 - 0.02). CONCLUSION: Nonoperative treatment for chylothorax after cardiothoracic procedures has significant hospital stay, morbidity, mortality, and reoperation rates.

Chylothorax associated with pulmonary compressive atelectasis in an emperor tamarin (Saguinus imperator).

Chylothorax is the accumulation of lymph in the thoracic cavity, and it has never been reported in neotropical primates. An emperor tamarin died and at necropsy chylothorax associated with pulmonary compressive atelectasis was diagnosed. Idiopathic chylothorax can be a cause of respiratory insufficiency and death in tamarins.

Quilotórax y abdomen agudo quiloso en el contexto de un vaciamiento ganglionar cervical / Chylothorax and chyloperitoneum in the setting of neck lymph node dissection

RESUMEN La presencia de quilotórax y de abdomen agudo quiloso luego de un vaciamiento ganglionar cervical izquierdo es una complicación muy poco frecuente. Se presenta el caso de una mujer de 24 años a quien se le realizó un vaciamiento ganglionar cervical bilateral por metástasis de carcinoma de tiroides. El segundo día del posoperatorio presentó dolor abdominal. Los estudios complementarios permitieron diagnosticar quilotórax y abdomen agudo quiloso, posiblemente como consecuencia de la ligadura inadvertida del conducto torácico. Se realizó el tratamiento médico y el drenaje percutáneo de ambas cavidades. Debido a buena evolución se indicó el alta hospitalaria con el drenaje abdominal, y continuar el seguimiento en forma ambulatoria. El tratamiento médico controlado para las lesiones del conducto torácico constituye la primera opción. En caso de mala evolución se debe pensar en la resolución quirúrgica sin demora.

ABSTRACT Chylothorax and chyloperitoneum after left lymph node dissection are rare complications. We report the case of a 24-year-old woman with a history of total thyroidectomy with bilateral lymph node dissection for metastases of papillary thyroid carcinoma. On postoperative day 2 the patient presented generalized abdominal pain. The complementary tests allowed for the diagnosis of chylothorax and chyloperitoneum. Medical treatment was started and percutaneous drainage of both cavities. The patient had favorable outcome and was discharged with the abdominal drain and indication of follow-up in the outpatient clinic. Supervised medical treatment for thoracic duct injuries constitute the first treatment option. Surgery should not be delayed in case of poor outcome.

Outcomes of Chylothorax Nonoperative Management After Cardiothoracic Surgery: A Systematic Review and Meta-Analysis

ABSTRACT Introduction: Chylothorax after thoracic surgery is a severe complication with high morbidity and mortality rate of 0.10 (95% confidence interval [CI] 0.06 - 0.02). There is no agreement on whether nonoperative treatment or early reoperation should be the initial intervention. This systematic review and meta-analysis aimed to evaluate the outcomes of the conservative approach to treat chyle leakage after cardiothoracic surgeries. Methods: A systematic review was conducted in PubMed®, Embase, Cochrane Library Central, and LILACS (Biblioteca Virtual em Saúde) databases; a manual search of references was also done. The inclusion criteria were patients who underwent cardiothoracic surgery, patients who received any nonoperative treatment (e.g., total parenteral nutrition, low-fat diet, medium chain triglycerides), and studies that evaluated chylothorax resolution, length of hospital stay, postoperative complications, infection, morbidity, and mortality. Central Message Nonoperative treatment for chylothorax after cardiothoracic procedures has significant hospital stay, morbidity, mortality, and reoperation rates. Results: Twenty-two articles were selected. Pulmonary complications, infections, and arrhythmia were the most common complications after surgical procedures. The incidence of chylothorax in cardiothoracic surgery was 1.8% (95% CI 1.7 - 2%). The mean time of maintenance of the chest tube was 16.08 days (95% CI 12.54 - 19.63), and the length of hospital stay was 23.74 days (95% CI 16.08 - 31.42) in patients with chylothorax receiving nonoperative treatment. Among patients that received conservative treatment, the morbidity event was 0.40 (95% CI 0.23 - 0.59), and reoperation rate was 0.37 (95% CI 0.27 - 0.49). Mortality rate was 0.10 (95% CI 0.06 - 0.02). Conclusion: Nonoperative treatment for chylothorax after cardiothoracic procedures has significant hospital stay, morbidity, mortality, and reoperation rates.

The essential role of thoracic duct embolization in management of traumatic iatrogenic chylothorax / O papel fundamental da embolização do ducto torácico no manejo de quilotórax traumático iatrogênico

Abstract This study aims to describe a case series of patients who underwent thoracic duct embolization (TDE) to treat traumatic iatrogenic chylothorax (TIC). Three patients were included: Case #1, a 49-year-old woman with follicular lymphoma developed a TIC following video-assisted thoracoscopic surgery to resect a solid right paravertebral mass and was treated with TDE using microcoils and N-butyl cyanoacrylate (NBCA) glue. Case #2, a 68-year-old man with cardiac amyloidosis developed a TIC following heart transplantation and was treated with TDE using microcoils and ethylene vinyl alcohol copolymer. Case#3: A 6-year-old patient with congenital heart disease developed a TIC following a Fontan procedure and was treated with TDE using NBCA glue. All lesions were identified during lymphangiography and TDE was successfully performed in all cases. TDE is a safe and valuable technique that provides minimally invasive treatment for TCI.

Resumo Este estudo objetiva descrever uma série de casos de pacientes submetidos a embolização do ducto torácico (EDT) para tratamento de quilotórax iatrogênico (QI). Três pacientes foram incluídos. Caso 1: um homem de 49 anos com linfoma folicular apresentou QI após ressecção de uma massa paravertebral por toracoscopia vídeo-assistida e foi submetido a EDT com micromolas e n-butil-cianoacrilato (NBCA). Caso 2: um homem de 68 anos com amiloidose cardíaca apresentou QI após ser submetido a transplante cardíaco e foi submetido a EDT com micromolas e copolímero de etileno e álcool vinílico. Caso 3: um paciente de 6 anos com malformação cardíaca congênita apresentou QI após cirurgia de Fontan e foi submetido a EDT com NBCA. Todas as lesões foram identificadas durante a linfangiografia, e a EDT foi realizada com sucesso. A EDT é uma técnica segura e valiosa, que pode oferecer um tratamento minimamente invasivo em casos de QI.

Thoracic duct lymphangioma and chylous ascites in a 24-year-old female.

Lymphangiomas are rare and correspond to 0.7% to 4.0% of mediastinal tumors, and isolated mediastinal location occurs in 1% of cases. They are benign tumors that originate from a congenital malformation of the lymphatic vessels and are diagnosed more frequently in children less than 2 years of age. Chylous ascites is a clinical manifestation of thoracic duct lymphangioma and is composed of lymph accumulation caused by dilation of this lymphatic channel. It appears milky in the peritoneal cavity, containing triglyceride levels higher than 200 mg/dl. We report the case of a young patient with chylous ascites and lymphangioma of the thoracic duct, who was conservatively treated with octreotide and a low-fat diet with medium-chain triglycerides.

Tratamiento conservador del quilotórax posquirúrgico en paciente pediátrico / Conservative treatment of post-surgical chylothorax in pediatric patient

INTRODUCCIÓN. El quilotórax resulta de un daño al conducto torácico por ruptura, laceración, desgarro o compresión. Es una patología rara de derrame pleural en la edad pediátrica, pero frecuente como complicación posterior a cirugía cardiotorácica. La base del tratamiento conservador se ha fundamentado en: drenaje inicial, modificación de la dieta, uso de somatostatina o análogos sintéticos como octreotide, cirugía, prevención y manejo de complicaciones. Fue preciso describir la experiencia institucional clínica así como su abordaje. CASO CLÍNICO. Paciente masculino de 4 meses de edad, que ingresó a la Unidad Pediátrica Área de Emergencias del Hospital de Especialidades Carlos Andrade Marín, el 13 de septiembre de 2019 con antece-dente quirúrgico de atresia de esófago corregida en etapa neonatal. Acudió con dificultad respiratoria, radiografía de tórax que evidenció derrame pleural derecho, toracentesis diagnóstica con salida de líquido de aspecto turbio y lechoso; se colocó tubo de tórax derecho. Se prescribió ayuno inicial, nutrición parenteral durante 4 semanas hasta comprobar resolución del quilotórax. Fue dado de alta en condición estable tras 43 días de hospitalización. DISCUSIÓN. La evidencia científica registró que el tratamiento conservador del quilotórax se basó en: drenaje, reposo digestivo inicial, nutrición parenteral, modificación cualitativa de la dieta enteral y uso de octreotide; el mismo que fue aplicado al paciente de este caso clínico con evolución favorable. CONCLUSIÓN. El tratamiento conservador y multidisciplinario en el abordaje del qui-lotórax fue exitoso y no necesitó manejo quirúrgico.

INTRODUCTION. Chylothorax results from damage to the thoracic duct by rupture, la-ceration, tear or compression. It is a rare pathology of pleural effusion in pediatric age, but frequent as a complication after cardiothoracic surgery. The basis of conservative treatment has been based on: initial drainage, diet modification, use of somatostatin or synthetic analogues such as octreotide, surgery, prevention and management of complications. It was necessary to describe the clinical institutional experience as well as its approach. CLINICAL CASE. A 4-month-old male patient was admitted to the Emergency Area Pediatric Unit of the Carlos Andrade Marín Specialties Hospital on september 13, 2019 with a surgical history of esophageal atresia corrected in the neonatal stage. He went with respiratory distress, chest X-ray that showed right pleural effusion, diagnostic thoracentesis with outflow of cloudy and milky fluid; a right chest tube was placed. Initial fasting was prescribed, parenteral nutrition for 4 weeks until resolution of the chylothorax was verified. He was discharged in stable condition after 43 days of hospitalization. DISCUSSION. The scientific evidence recorded that the conservative treatment of chylothorax was based on: drainage, initial digestive rest, parenteral nutrition, qualitative modification of enteral diet and use of octreotide; the same that was applied to the patient of this clinical case with favorable evolu-tion. CONCLUSION. Conservative and multidisciplinary treatment in the approach to chylothorax was successful.

Chylous cyst-venous shunt for the management of central conducting lymphatic anomaly.

We present the case of a 45-year-old man who had presented with ubiquitous chylous reflux that manifested as a bilateral inguinal chylous cutaneous fistula and a voluminous right cervical chylous cyst. He had difficulty breathing owing to compression of the airway. Anastomosis of the chylous cyst wall with the external jugular vein was performed using a valvular vein segment to prevent blood reflux. Postoperatively, anticoagulant therapy was initiated. We found this derivative surgical procedure to be an effective and minimally invasive technique for complex lymphatic anomalies.

Magnetic resonance lymphangiography in group 1 paediatric pulmonary arterial hypertension.

Pulmonary hypertension could have thoracic lymphatic abnormalities caused by right ventricular failure. Since there is no description of such abnormalities, the purpose of this study was to investigate them with magnetic resonance. Prospective review magnetic resonance T2-weighted lymphangiography was performed between January 2017 and October 2019 through quantitative thoracic duct diameter, diameter index and qualitative lymphatic abnormalities types: 1 - little or none abnormalities, 2 - abnormalities in supraclavicular region, 3 - abnormalities extending into the mediastinum and 4 - abnormalities extending into the lung. Five patients with group 1 pulmonary arterial hypertension participated in this study. The mean age was 12.44 ± 4.92 years, three male and two female. The quantitative analysis yielded the following results: mean thoracic duct diameter of 2.92 ± 0.16 mm and thoracic duct index 2.28 ± 1.03 mm/m2. Qualitative lymphangiography abnormalities were type 1 in three patients, type 2 in one, all with low-risk determinants, and type 3 in one with high-risk determinants and right ventricular failure. Magnetic resonance T2-weighted lymphangiography in group 1 paediatric pulmonary arterial hypertension allowed for the identification of the thoracic duct, which was used to perform both quantitative and qualitative analysis of thoracic lymphatic abnormalities, in particular when increased high-risk determinants and right ventricular failure were present. These features represent an extracardiac finding useful to understand systemic venous congestion impact on lymphatic system.

Thoracic duct lymphangioma and chylous ascites in a 24-year-old female

Lymphangiomas are rare and correspond to 0.7% to 4.0% of mediastinal tumors, and isolated mediastinal location occurs in 1% of cases. They are benign tumors that originate from a congenital malformation of the lymphatic vessels and are diagnosed more frequently in children less than 2 years of age. Chylous ascites is a clinical manifestation of thoracic duct lymphangioma and is composed of lymph accumulation caused by dilation of this lymphatic channel. It appears milky in the peritoneal cavity, containing triglyceride levels higher than 200 mg/dl. We report the case of a young patient with chylous ascites and lymphangioma of the thoracic duct, who was conservatively treated with octreotide and a low-fat diet with medium-chain triglycerides.

Extrapleural Closure of Patent Ductus Arteriosus: How We Do It.

Patent ductus arteriosus (PDA) is a clinical condition mostly found in premature newborns. Among several medical, surgical and interventional treatment options, extrapleural ligation through a left minithoracotomy is recognized as a safe, efficient and less expensive technique. In fact, it requires short surgical times, grants good exposure of the duct and nearby structures (e.g., thoracic duct, left recurrent laryngeal nerve), and avoids pleural space opening and subsequent pulmonary complications in preterm patients. This approach seems ideal due to its lower costs, especially in developing countries with a high birth rate and limited resources.

Extrapleural closure of patent Ductus Arteriosus: how we do it

Abstract Patent ductus arteriosus (PDA) is a clinical condition mostly found in premature newborns. Among several medical, surgical and interventional treatment options, extrapleural ligation through a left minithoracotomy is recognized as a safe, efficient and less expensive technique. In fact, it requires short surgical times, grants good exposure of the duct and nearby structures (e.g., thoracic duct, left recurrent laryngeal nerve), and avoids pleural space opening and subsequent pulmonary complications in preterm patients. This approach seems ideal due to its lower costs, especially in developing countries with a high birth rate and limited resources.

Chylous ascites developing after open thoracoabdominal aortic aneurysm repair in a patient with marfan syndrome

Abstract Chylous ascites is the pathologic accumulation of chylous fluid in the peritoneal cavity, caused by lymphomas, metastatic malignancies, and abdominal surgeries, rarely due to surgical trauma of the cisterna chyli or its major branches. A 24-year-old man with history of Marfan syndrome presented to our hospital with abdominal distention, abdominal pain, fluid in the incision region, and weakness. He had underwent an elective open aneurysm repair surgery nine days before for thoracoabdominal aortic aneurysm. Computed tomography revealed massive fluid collection in the abdominal cavity, which was drained surgically. He was diagnosed with chylous ascites and was discharged after conservative treatment.

Chylous Ascites Developing after Open Thoracoabdominal Aortic Aneurysm Repair in a Patient with Marfan Syndrome.

Chylous ascites is the pathologic accumulation of chylous fluid in the peritoneal cavity, caused by lymphomas, metastatic malignancies, and abdominal surgeries, rarely due to surgical trauma of the cisterna chyli or its major branches. A 24-year-old man with history of Marfan syndrome presented to our hospital with abdominal distention, abdominal pain, fluid in the incision region, and weakness. He had underwent an elective open aneurysm repair surgery nine days before for thoracoabdominal aortic aneurysm. Computed tomography revealed massive fluid collection in the abdominal cavity, which was drained surgically. He was diagnosed with chylous ascites and was discharged after conservative treatment.

Tube thoracostomy: One-off cause of chylothorax.

Chylothorax secondary to thorax drainage is a rare entity, with only five previously reported cases. A patient that sustained injuries after an accident involving a power tool, originally seen at another service, presented with a metal fragment embedded in the 4th intercostal space of the right hemithorax and ipsilateral pneumothorax. The patient underwent thoracic drainage and was referred to our hospital. After one day, the drained fluid became milky and laboratory tests confirmed chylothorax. Videothoracoscopy disclosed compression of the thoracic duct topography by the drainage tube.

Tratamento cirúrgico bem sucedido de quilotórax idiopático em gato / Successful surgical treatment of idiopathic chylothorax in a cat

Background: Chylothorax in cats represents a challenge due to the possibility of involvement of multiple etiologies and the harmful consequences resulting of the presence of the chylous effusion in the thorax. The causes include neoplasms in the thoracic cavity, heart disease and thoracic injuries. It is imperative that clinical nutritional and therapeutic and / or surgical management be immediate and directed to the treatment of the cause. The objective of this work was to report a case of idiopathic chylothorax in a domestic cat solved through surgical intervention and dietary maintenance applied.Case: A 4-year-old male cat, fed with diet for the age range of adult cats, was attended at the Veterinary Hospital of the Federal Rural University of Rio de Janeiro (HV - UFRRJ), with clinical complaint of difficulty breathing, inappetence, prostration and weight loss. In the clinical examination was verified intense tachypnea, presence of heart murmur, normocorated mucosae, dehydration 7%. The animal was sedated to be submitted to radiographic examination of the thorax with pethidine and midazolam. Thoracic radiographs on the lateral, ventral-dorsal and orthostatic positions were realized and severe pleural effusion was observed in both hemitorax with drainage of 180 mL of lactescent fluid from the right hemithorax and 120 mL of left hemithorax liquid. Through analysis of cavity liquids the effusion was classified as chylous effusion. The hemogram showed a neutrophilic leukocytosis. Serum cholesterol and triglyceride concentrations (28 mg/ dL and 43 mg/dL, respectively) were lower than the concentrations of the cavity liquid (67 mg/dL and 722 mg/dL, respectively). Ultrasound examination revealed no mass in the thoracic cavity and no changes in the pulmonary parenchyma. The echocardiographic examination was also performed and did not reveal any cardiac alterations.[...](AU)

Tratamento cirúrgico bem sucedido de quilotórax idiopático em gato / Successful surgical treatment of idiopathic chylothorax in a cat

Background: Chylothorax in cats represents a challenge due to the possibility of involvement of multiple etiologies and the harmful consequences resulting of the presence of the chylous effusion in the thorax. The causes include neoplasms in the thoracic cavity, heart disease and thoracic injuries. It is imperative that clinical nutritional and therapeutic and / or surgical management be immediate and directed to the treatment of the cause. The objective of this work was to report a case of idiopathic chylothorax in a domestic cat solved through surgical intervention and dietary maintenance applied.Case: A 4-year-old male cat, fed with diet for the age range of adult cats, was attended at the Veterinary Hospital of the Federal Rural University of Rio de Janeiro (HV - UFRRJ), with clinical complaint of difficulty breathing, inappetence, prostration and weight loss. In the clinical examination was verified intense tachypnea, presence of heart murmur, normocorated mucosae, dehydration 7%. The animal was sedated to be submitted to radiographic examination of the thorax with pethidine and midazolam. Thoracic radiographs on the lateral, ventral-dorsal and orthostatic positions were realized and severe pleural effusion was observed in both hemitorax with drainage of 180 mL of lactescent fluid from the right hemithorax and 120 mL of left hemithorax liquid. Through analysis of cavity liquids the effusion was classified as chylous effusion. The hemogram showed a neutrophilic leukocytosis. Serum cholesterol and triglyceride concentrations (28 mg/ dL and 43 mg/dL, respectively) were lower than the concentrations of the cavity liquid (67 mg/dL and 722 mg/dL, respectively). Ultrasound examination revealed no mass in the thoracic cavity and no changes in the pulmonary parenchyma. The echocardiographic examination was also performed and did not reveal any cardiac alterations.[...]

[Cervical thoracic duct cyst: An uncommon entity]. / Quiste cervical del conducto torácico: una rara entidad.

BACKGROUND: Cervical thoracic duct cysts are a rare anomaly. OBJECTIVE: To report a case of cervical thoracic duct cyst, and perform a literature review. CLINICAL CASE: A 78-year-old female, with a one-year history of a left-sided asymptomatic supraclavicular cystic mass. Computerized tomography revealed a cystic mass 42mm in diameter. We performed a fine needle aspiration puncture, obtaining a thick, milky, whitish liquid. The patient underwent surgery; finding a left-sided supraclavicular cystic mass, with some lymph vessels heading towards the jugulo subclavian venous junction. We performed a ligation of these lymph vessels and resection of the mass. The histopathologic study confirmed the diagnosis of thoracic duct cyst. CONCLUSION: Diagnosis of cervical thoracic duct cyst should be suspected with a cystic lesion in the left supraclavicular region, which when perforated exudes a very distinctive thick milky, whitish liquid with a high content of lymphocytes and triglycerides. Treatment should be complete removal with ligation of the lymphatic afferent vessels.