Lymphangioma overview: Difference between revisions
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==Overview== | ==Overview== | ||
Lymphangioma arises from [[lymph]] vessels, which are normally involved in the re-circulation of excess body fluid back into the blood stream. The exact pathogenesis of lymphangioma is not fully understood. It is thought that lymphangioma is caused by either sequestration of lymph tissue, abnormal budding of lymph vessels, lack of fusion with the [[venous]] system, or obstruction of lymph vessels. Lymphangiomas most commonly develop at the [[head]] and [[neck]] regions. Lymphangioma is associated with a number of conditions that include [[Turner syndrome]] and [[Down syndrome]]. On gross pathology, characteristic findings of lymphangioma include a grey-white, well circumscribed, edematous mass with a variable size and consistency. On microscopic histopathological analysis, characteristic findings of lymphangioma include thin walled [[endothelial]] lining, intraluminal accumulation of [[eosinophilic]] deposits, and clusters of intraluminal [[lymphocyte]]s. There are no known direct causes for lymphangioma. Lymphangioma must be differentiated from [[arteriovenous malformation]], [[branchial cleft]] [[cyst]], and [[dermoid cyst]]. Lymphangiomas are rare, accounting for 4% of all vascular tumors among children. The incidence of lymphangioma is estimated to be less than 2 cases per 100,000 individuals in the United States. Lymphangioma commonly affects individuals younger than 5 years of age. Lymphangioma affects men and women equally. There is no racial predilection to the lymphangioma. CT scan may be diagnostic of lymphangioma. Findings on CT scan suggestive of lymphangioma include a homogeneous, [[cystic]], mass that may demonstrate intrinsic [[septa|septations]] and compression of adjacent organs. The mainstay of therapy for lymphangioma is surgery. Treatment for lymphangioma involves the removal of the abnormal tissue; however complete removal may be impossible without removing other normal areas. Most patients need at least two procedures done for the removal process to be achieved. | Lymphangioma arises from [[lymph]] vessels, which are normally involved in the re-circulation of excess body fluid back into the blood stream. The exact pathogenesis of lymphangioma is not fully understood. It is thought that lymphangioma is caused by either sequestration of lymph tissue, abnormal budding of lymph vessels, lack of fusion with the [[venous]] system, or obstruction of lymph vessels. Lymphangiomas most commonly develop at the [[head]] and [[neck]] regions. Lymphangioma is associated with a number of conditions that include [[Turner syndrome]] and [[Down syndrome]]. On gross pathology, characteristic findings of lymphangioma include a grey-white, well circumscribed, edematous mass with a variable size and consistency. On microscopic histopathological analysis, characteristic findings of lymphangioma include thin walled [[endothelial]] lining, intraluminal accumulation of [[eosinophilic]] deposits, and clusters of intraluminal [[lymphocyte]]s. There are no known direct causes for lymphangioma. Lymphangioma must be differentiated from [[arteriovenous malformation]], [[branchial cleft]] [[cyst]], and [[dermoid cyst]]. Lymphangiomas are rare, accounting for 4% of all vascular tumors among children. The incidence of lymphangioma is estimated to be less than 2 cases per 100,000 individuals in the United States. Lymphangioma commonly affects individuals younger than 5 years of age. Lymphangioma affects men and women equally. There is no racial predilection to the lymphangioma. CT scan may be diagnostic of lymphangioma. Findings on CT scan suggestive of lymphangioma include a homogeneous, [[cystic]], mass that may demonstrate intrinsic [[septa|septations]] and compression of adjacent organs. The mainstay of therapy for lymphangioma is surgery. Treatment for lymphangioma involves the removal of the abnormal tissue; however complete removal may be impossible without removing other normal areas. Most patients need at least two procedures done for the removal process to be achieved.<ref name="wiki">Lymphangioma. Wikipedia (2016) https://en.wikipedia.org/wiki/Lymphangioma Accessed on March 3, 2015</ref><ref name="patho">Lymphangioma. PathologyOutlines (2016) http://www.pathologyoutlines.com/topic/softtissuelymphangiomacystic.html Accessed on March 5, 2016</ref><ref name="patho2">Lymphangioma. Libre Pathology (2016) http://librepathology.org/wiki/Vascular_tumours#Lymphangioma Accessed on March 5, 2016</ref><ref name="radio"> Lymphangioma. Radiopeadia (2016) http://radiopaedia.org/articles/lymphangioma Accessed on March 5, 2016</ref> | ||
==Pathophysiology== | ==Pathophysiology== | ||
Revision as of 19:18, 7 March 2016
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Haytham Allaham, M.D. [2]
Overview
Lymphangioma arises from lymph vessels, which are normally involved in the re-circulation of excess body fluid back into the blood stream. The exact pathogenesis of lymphangioma is not fully understood. It is thought that lymphangioma is caused by either sequestration of lymph tissue, abnormal budding of lymph vessels, lack of fusion with the venous system, or obstruction of lymph vessels. Lymphangiomas most commonly develop at the head and neck regions. Lymphangioma is associated with a number of conditions that include Turner syndrome and Down syndrome. On gross pathology, characteristic findings of lymphangioma include a grey-white, well circumscribed, edematous mass with a variable size and consistency. On microscopic histopathological analysis, characteristic findings of lymphangioma include thin walled endothelial lining, intraluminal accumulation of eosinophilic deposits, and clusters of intraluminal lymphocytes. There are no known direct causes for lymphangioma. Lymphangioma must be differentiated from arteriovenous malformation, branchial cleft cyst, and dermoid cyst. Lymphangiomas are rare, accounting for 4% of all vascular tumors among children. The incidence of lymphangioma is estimated to be less than 2 cases per 100,000 individuals in the United States. Lymphangioma commonly affects individuals younger than 5 years of age. Lymphangioma affects men and women equally. There is no racial predilection to the lymphangioma. CT scan may be diagnostic of lymphangioma. Findings on CT scan suggestive of lymphangioma include a homogeneous, cystic, mass that may demonstrate intrinsic septations and compression of adjacent organs. The mainstay of therapy for lymphangioma is surgery. Treatment for lymphangioma involves the removal of the abnormal tissue; however complete removal may be impossible without removing other normal areas. Most patients need at least two procedures done for the removal process to be achieved.[1][2][3][4]
Pathophysiology
Lymphangioma arises from lymph vessels, which are normally involved in the re-circulation of excess body fluid back into the blood stream. The exact pathogenesis of lymphangioma is not fully understood. It is thought that lymphangioma is caused by either sequestration of lymph tissue, abnormal budding of lymph vessels, lack of fusion with the venous system, or obstruction of lymph vessels. Lymphangiomas most commonly develop at the head and neck regions. Lymphangioma is associated with a number of conditions that include Turner syndrome and Down syndrome. On gross pathology, characteristic findings of lymphangioma include a grey-white, well circumscribed, edematous mass with a variable size and consistency. On microscopic histopathological analysis, characteristic findings of lymphangioma include thin walled endothelial lining, intraluminal accumulation of eosinophilic deposits, and clusters of intraluminal lymphocytes.
Causes
There are no known direct causes for lymphangioma.
Differentiating Lymphangioma from other Diseases
Lymphangioma must be differentiated from arteriovenous malformation, branchial cleft cyst, and dermoid cyst.
Epidemiology and Demographics
Lymphangiomas are rare, accounting for 4% of all vascular tumors among children. The incidence of lymphangioma is estimated to be less than 2 cases per 100,000 individuals in the United States. Lymphangioma commonly affects individuals younger than 5 years of age. Lymphangioma affects men and women equally. There is no racial predilection to the lymphangioma.
Risk Factors
The most potent risk factor in the development of lymphangioma is the presence of genetic disorders such as Turner syndrome, Down syndrome, and Noonan syndrome.
Natural History, Complications and Prognosis
Most of the patients with lymphangioma will develop a cervico-facial mass that often grows in proportion to the patient’s body growth rate. The mass usually recurs after surgical interventions. Common complications of lymphangioma include esophageal obstruction, upper respiratory tract obstruction, infections, and compression of adjacent tissues such as nerves and blood vessels. Prognosis of lymphangioma is generally excellent.
Diagnosis
History and Symptoms
The majority of patients with lymphangioma are asymptomatic.
Physical Exam
Lymphangioma patients often appear healthy. On physical exam a painless , compressible, soft neck mass that often transilluminates is a diagnostic finding on physical exam.
Laboratory Findings
There are no diagnostic lab findings associated with lymphangioma.
CT Scan
CT scan may be diagnostic of lymphangioma. Findings on CT scan suggestive of lymphangioma include a homogeneous, cystic, mass that may demonstrate intrinsic septations and compression of adjacent organs.
MRI
MRI may be diagnostic of lymphangioma. Findings on MRI suggestive of lymphangioma include hyperintense signal enhancement due to cyst formation.
Other Diagnostic Studies
The definitive diagnosis of lymphangioma is confirmed by a biopsy. Characteristic findings for lymphangioma on microscopic histopathological analysis can be found here.
Treatment
Medical Therapy
There is no medical treatment for lymphangioma; the mainstay of therapy is surgery.
Surgery
The mainstay of therapy for lymphangioma is surgery. Treatment for lymphangioma involves the removal of the abnormal tissue; however complete removal may be impossible without removing other normal areas. Most patients need at least two procedures done for the removal process to be achieved.
References
- ↑ Lymphangioma. Wikipedia (2016) https://en.wikipedia.org/wiki/Lymphangioma Accessed on March 3, 2015
- ↑ Lymphangioma. PathologyOutlines (2016) http://www.pathologyoutlines.com/topic/softtissuelymphangiomacystic.html Accessed on March 5, 2016
- ↑ Lymphangioma. Libre Pathology (2016) http://librepathology.org/wiki/Vascular_tumours#Lymphangioma Accessed on March 5, 2016
- ↑ Lymphangioma. Radiopeadia (2016) http://radiopaedia.org/articles/lymphangioma Accessed on March 5, 2016