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==Overview==
==Overview==
Hepatosplenic T cell lymphoma arises from an immature cytotoxic [[T-cell]] clonally expressing the γδ [[T-cell receptor]]. Gamma delta (γδ) T cells constitute 1% to 5% of the circulating lymphocytes in human blood. These cells preferentially home in on some epithelial rich tissues and sinusoidal areas of the splenic red pulp where they represent up to 30% of the whole T-cell population. Hepatosplenic γδ T-cell lymphoma (HSTCL) is a rare aggressive subtype of extra nodal lymphoma. Genes involved in the pathogenesis of hepatosplenic T cell lymphoma include isochromosome 7q, TRG@, and T-cell receptor (TCR) Gamma/Delta genes. On gross pathology, Diffuse enlargment of [[liver]] and [[spleen]] are characteristic findings of hepatosplenic T cell lymphoma. On microscopic histopathological analysis, monotonous appearance, small amount of [[cytoplasm]], and inconspicuous [[nucleoli]] are characteristic findings of neoplastic cells of hepatosplenic T cell lymphoma. There are no established causes for hepatosplenic T cell lymphoma. Hepatosplenic T cell lymphoma is a common disease that tends to affect young adults and adolescents. Males are more commonly affected with hepatosplenic T cell lymphoma than females.<ref name=cancer.gov> Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/.  Accessed on February 22, 2016</ref>There are no established risk factors for hepatosplenic T cell lymphoma. According to the the U.S. Preventive Service Task Force (USPSTF), there is insufficient evidence to recommend routine screening for hepatosplenic T cell lymphoma.<ref name=uspreventive> Recommendations. U.S Preventive Services Task Force. http://www.uspreventiveservicestaskforce.org/BrowseRec/Search?s=hepatosplenic+T+cell+lymphoma. Accessed on February 23, 2016</ref>Hepatosplenic T cell lymphoma must be differentiated from other diseases such as [[splenic marginal zone lymphoma]], [[cutaneous T cell lymphoma]], [[extranodal NK-T-cell lymphoma]], and [[angioimmunoblastic T-cell lymphoma]]. Depending on the extent of the tumor at the time of diagnosis, the prognosis may vary. However, the prognosis is generally regarded as poor. According to the Lugano classification, there are four stages of hepatosplenic T cell lymphoma based on the number of nodes and extranodal involvement. The most common symptoms of hepatosplenic T cell lymphoma include [[fever]], fatigue, [[weight loss]], skin rash, [[night sweats]], skin rash, chest pain, [[abdominal pain]], [[bone pain]], and painless swelling in the neck, axilla, groin, thorax, and abdomen.<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref> Common physical examination findings of hepatosplenic T cell lymphoma include [[fever]], [[rash]], [[ulcer]], parlor, chest tenderness, abdomen tenderness, [[hepatomegaly]], [[splenomegaly]], bone tenderness, [[Lymphadenopathy|peripheral lymphadenopathy]], and [[Lymphadenopathy|central lymphadenopathy]].<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref> Laboratory tests for hepatosplenic T cell lymphoma include [[complete blood count]] (CBC), blood chemistry studies, cytogenetic analysis, [[flow cytometry]], [[immunohistochemistry]],  and [[immunophenotyping]].<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref>[[CT]] scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.<ref name=cancer.gov> Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/.  Accessed on February 22, 2016</ref>[[MRI]] scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.<ref name=cancer.gov> Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 22, 2016</ref>On abdominal ultrasound, hepatosplenic T cell lymphoma is characterized by [[hepatomegaly]] and [[splenomegaly]]. [[PET]] scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.<ref name=cancer.gov> Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 22, 2016</ref>  
Hepatosplenic T cell lymphoma arises from an immature cytotoxic [[T-cell]] clonally expressing the γδ [[T-cell receptor]]. Gamma delta (γδ) T cells constitute 1% to 5% of the circulating lymphocytes in human blood. These cells preferentially home in on some epithelial rich tissues and sinusoidal areas of the splenic red pulp where they represent up to 30% of the whole T-cell population. Hepatosplenic γδ T-cell lymphoma (HSTCL) is a rare aggressive subtype of extra nodal lymphoma. Genes involved in the pathogenesis of hepatosplenic T cell lymphoma include isochromosome 7q, TRGά, and T-cell receptor (TCR) Gamma/Delta genes. On gross pathology, Diffuse enlargment of [[liver]] and [[spleen]] are characteristic findings of hepatosplenic T cell lymphoma. On microscopic histopathological analysis, monotonous appearance, small amount of [[cytoplasm]], and inconspicuous [[nucleoli]] are characteristic findings of neoplastic cells of hepatosplenic T cell lymphoma. There are no established causes for hepatosplenic T cell lymphoma. Hepatosplenic T cell lymphoma is a common disease that tends to affect young adults and adolescents. Males are more commonly affected with hepatosplenic T cell lymphoma than females.<ref name=cancer.gov> Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/.  Accessed on February 22, 2016</ref> There are no established risk factors for hepatosplenic T cell lymphoma. According to the the U.S. Preventive Service Task Force (USPSTF), there is insufficient evidence to recommend routine screening for hepatosplenic T cell lymphoma.<ref name=uspreventive> Recommendations. U.S Preventive Services Task Force. http://www.uspreventiveservicestaskforce.org/BrowseRec/Search?s=hepatosplenic+T+cell+lymphoma. Accessed on February 23, 2016</ref> Hepatosplenic T cell lymphoma must be differentiated from other diseases such as [[splenic marginal zone lymphoma]], [[cutaneous T cell lymphoma]], [[extranodal NK-T-cell lymphoma]], and [[angioimmunoblastic T-cell lymphoma]]. Depending on the extent of the tumor at the time of diagnosis, the prognosis may vary. However, the prognosis is generally regarded as poor. According to the Lugano classification, there are four stages of hepatosplenic T cell lymphoma based on the number of nodes and extranodal involvement. The most common symptoms of hepatosplenic T cell lymphoma include [[fever]], fatigue, [[weight loss]], skin rash, [[night sweats]], skin rash, chest pain, [[abdominal pain]], [[bone pain]], and painless swelling in the neck, axilla, groin, thorax, and abdomen.<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref> Common physical examination findings of hepatosplenic T cell lymphoma include [[fever]], [[rash]], [[ulcer]], parlor, chest tenderness, abdomen tenderness, [[hepatomegaly]], [[splenomegaly]], bone tenderness, [[Lymphadenopathy|peripheral lymphadenopathy]], and [[Lymphadenopathy|central lymphadenopathy]].<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref> Laboratory tests for hepatosplenic T cell lymphoma include [[complete blood count]] (CBC), blood chemistry studies, cytogenetic analysis, [[flow cytometry]], [[immunohistochemistry]],  and [[immunophenotyping]].<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref>[[CT]] scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.<ref name=cancer.gov> Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/.  Accessed on February 22, 2016</ref>[[MRI]] scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.<ref name=cancer.gov> Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 22, 2016</ref> On abdominal ultrasound, hepatosplenic T cell lymphoma is characterized by [[hepatomegaly]] and [[splenomegaly]]. [[PET]] scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.<ref name=cancer.gov> Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 22, 2016</ref> Other diagnostic studies for hepatosplenic T cell lymphoma include [[laparoscopy]], [[laparotomy]], [[bone marrow aspiration]], and [[bone marrow biopsy]].<ref name= seer>Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 22, 2016</ref> The predominant therapy for hepatosplenic T cell lymphoma is [[chemotherapy]]. Adjunctive stem cell transplant may be required.
 
 
 
   
 


==Pathophysiology==
==Pathophysiology==
Line 28: Line 23:
According to the Lugano classification, there are four stages of hepatosplenic T cell lymphoma based on the number of nodes and extranodal involvement.
According to the Lugano classification, there are four stages of hepatosplenic T cell lymphoma based on the number of nodes and extranodal involvement.
===Symptoms===
===Symptoms===
The most common symptoms of hepatosplenic T cell lymphoma include [[fever]], fatigue, [[weight loss]], skin rash, [[night sweats]], skin rash, chest pain, [[abdominal pain]], [[bone pain]], and painless swelling in the neck, axilla, groin, thorax, and abdomen.<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref>
The most common symptoms of hepatosplenic T cell lymphoma include [[fever]], [[fatigue]], [[weight loss]], [[skin rash]], [[night sweats]], [[chest pain]], [[abdominal pain]], [[bone pain]], and painless swelling in the neck, axilla, groin, thorax, and abdomen.<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref>
 
===Physical Examination===
===Physical Examination===
Common physical examination findings of hepatosplenic T cell lymphoma include [[fever]], [[rash]], [[ulcer]], parlor, chest tenderness, abdomen tenderness, [[hepatomegaly]], [[splenomegaly]], bone tenderness, [[Lymphadenopathy|peripheral lymphadenopathy]], and [[Lymphadenopathy|central lymphadenopathy]].<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref>
Common physical examination findings of hepatosplenic T cell lymphoma include [[fever]], [[rash]], [[ulcer]], [[pallor]], chest tenderness, [[abdominal tenderness]], [[hepatomegaly]], [[splenomegaly]], bone tenderness, [[Lymphadenopathy|peripheral lymphadenopathy]], and [[Lymphadenopathy|central lymphadenopathy]].<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref>
 
===Laboratory tests===
===Laboratory tests===
Laboratory tests for hepatosplenic T cell lymphoma include [[complete blood count]] (CBC), blood chemistry studies, cytogenetic analysis, [[flow cytometry]], [[immunohistochemistry]],  and [[immunophenotyping]].<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref>
Laboratory tests for hepatosplenic T cell lymphoma include [[complete blood count]] (CBC), blood chemistry studies, cytogenetic analysis, [[flow cytometry]], [[immunohistochemistry]],  and [[immunophenotyping]].<ref name=cancer.gov> Hepatosplenic T-cell lymphoma. Surveillance, Epidemiology, and End Results Program.  http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 19, 2016</ref>
Line 41: Line 38:
===Ultrasound===
===Ultrasound===
On abdominal ultrasound, hepatosplenic T cell lymphoma is characterized by [[hepatomegaly]] and [[splenomegaly]].
On abdominal ultrasound, hepatosplenic T cell lymphoma is characterized by [[hepatomegaly]] and [[splenomegaly]].
===PET===
===Other imaging findings===
[[PET]] scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.<ref name=cancer.gov> Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/.  Accessed on February 22, 2016</ref>  
[[PET]] scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.<ref name=cancer.gov> Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/.  Accessed on February 22, 2016</ref>
 
===Other Diagnostic Studies===
 
Other diagnostic studies for hepatosplenic T cell lymphoma include [[laparoscopy]], [[laparotomy]], [[bone marrow aspiration]], and [[bone marrow biopsy]].<ref name= seer >Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/.  Accessed on February 22, 2016</ref>
 
==Treatment==
 
===Medical Therapy===
 
The predominant therapy for hepatosplenic T cell lymphoma is [[chemotherapy]]. Adjunctive stem cell transplant may be required.
 


==References==
==References==
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Latest revision as of 02:01, 27 November 2017

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Sowminya Arikapudi, M.B,B.S. [2]

Overview

Hepatosplenic T cell lymphoma arises from an immature cytotoxic T-cell clonally expressing the γδ T-cell receptor. Gamma delta (γδ) T cells constitute 1% to 5% of the circulating lymphocytes in human blood. These cells preferentially home in on some epithelial rich tissues and sinusoidal areas of the splenic red pulp where they represent up to 30% of the whole T-cell population. Hepatosplenic γδ T-cell lymphoma (HSTCL) is a rare aggressive subtype of extra nodal lymphoma. Genes involved in the pathogenesis of hepatosplenic T cell lymphoma include isochromosome 7q, TRGά, and T-cell receptor (TCR) Gamma/Delta genes. On gross pathology, Diffuse enlargment of liver and spleen are characteristic findings of hepatosplenic T cell lymphoma. On microscopic histopathological analysis, monotonous appearance, small amount of cytoplasm, and inconspicuous nucleoli are characteristic findings of neoplastic cells of hepatosplenic T cell lymphoma. There are no established causes for hepatosplenic T cell lymphoma. Hepatosplenic T cell lymphoma is a common disease that tends to affect young adults and adolescents. Males are more commonly affected with hepatosplenic T cell lymphoma than females.[1] There are no established risk factors for hepatosplenic T cell lymphoma. According to the the U.S. Preventive Service Task Force (USPSTF), there is insufficient evidence to recommend routine screening for hepatosplenic T cell lymphoma.[2] Hepatosplenic T cell lymphoma must be differentiated from other diseases such as splenic marginal zone lymphoma, cutaneous T cell lymphoma, extranodal NK-T-cell lymphoma, and angioimmunoblastic T-cell lymphoma. Depending on the extent of the tumor at the time of diagnosis, the prognosis may vary. However, the prognosis is generally regarded as poor. According to the Lugano classification, there are four stages of hepatosplenic T cell lymphoma based on the number of nodes and extranodal involvement. The most common symptoms of hepatosplenic T cell lymphoma include fever, fatigue, weight loss, skin rash, night sweats, skin rash, chest pain, abdominal pain, bone pain, and painless swelling in the neck, axilla, groin, thorax, and abdomen.[1] Common physical examination findings of hepatosplenic T cell lymphoma include fever, rash, ulcer, parlor, chest tenderness, abdomen tenderness, hepatomegaly, splenomegaly, bone tenderness, peripheral lymphadenopathy, and central lymphadenopathy.[1] Laboratory tests for hepatosplenic T cell lymphoma include complete blood count (CBC), blood chemistry studies, cytogenetic analysis, flow cytometry, immunohistochemistry, and immunophenotyping.[1]CT scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.[1]MRI scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.[1] On abdominal ultrasound, hepatosplenic T cell lymphoma is characterized by hepatomegaly and splenomegaly. PET scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.[1] Other diagnostic studies for hepatosplenic T cell lymphoma include laparoscopy, laparotomy, bone marrow aspiration, and bone marrow biopsy.[3] The predominant therapy for hepatosplenic T cell lymphoma is chemotherapy. Adjunctive stem cell transplant may be required.

Pathophysiology

Hepatosplenic T cell lymphoma arises from an immature cytotoxic T-cell clonally expressing the γδ T-cell receptor. Gamma delta (γδ) T cells constitute 1% to 5% of the circulating lymphocytes in human blood. These cells preferentially home in on some epithelial rich tissues and sinusoidal areas of the splenic red pulp where they represent up to 30% of the whole T-cell population. Hepatosplenic γδ T-cell lymphoma (HSTCL) is a rare aggressive subtype of extra nodal lymphoma. Genes involved in the pathogenesis of hepatosplenic T cell lymphoma include isochromosome 7q, TRG@, and T-cell receptor (TCR) Gamma/Delta genes. On gross pathology, Diffuse enlargment of liver and spleen are characteristic findings of hepatosplenic T cell lymphoma. On microscopic histopathological analysis, monotonous appearance, small amount of cytoplasm, and inconspicuous nucleoli are characteristic findings of neoplastic cells of hepatosplenic T cell lymphoma.

Causes

There are no established causes for hepatosplenic T cell lymphoma.

Epidemiology and Demographics

Hepatosplenic T cell lymphoma is a common disease that tends to affect young adults and adolescents. Males are more commonly affected with hepatosplenic T cell lymphoma than females.[1]

Risk Factors

There are no established risk factors for hepatosplenic T cell lymphoma.

Screening

According to the the U.S. Preventive Service Task Force (USPSTF), there is insufficient evidence to recommend routine screening for hepatosplenic T cell lymphoma.[2]

Differential Diagnosis

Hepatosplenic T cell lymphoma must be differentiated from other diseases such as splenic marginal zone lymphoma, cutaneous T cell lymphoma, extranodal NK-T-cell lymphoma, and angioimmunoblastic T-cell lymphoma.

Prognosis

Depending on the extent of the tumor at the time of diagnosis, the prognosis may vary. However, the prognosis is generally regarded as poor.

Diagnosis

Staging

According to the Lugano classification, there are four stages of hepatosplenic T cell lymphoma based on the number of nodes and extranodal involvement.

Symptoms

The most common symptoms of hepatosplenic T cell lymphoma include fever, fatigue, weight loss, skin rash, night sweats, chest pain, abdominal pain, bone pain, and painless swelling in the neck, axilla, groin, thorax, and abdomen.[1]

Physical Examination

Common physical examination findings of hepatosplenic T cell lymphoma include fever, rash, ulcer, pallor, chest tenderness, abdominal tenderness, hepatomegaly, splenomegaly, bone tenderness, peripheral lymphadenopathy, and central lymphadenopathy.[1]

Laboratory tests

Laboratory tests for hepatosplenic T cell lymphoma include complete blood count (CBC), blood chemistry studies, cytogenetic analysis, flow cytometry, immunohistochemistry, and immunophenotyping.[1]

Biopsy

Lymph node or extra nodal tissue (liver, spleen, and bone marrow) biopsy is diagnostic of hepatosplenic T cell lymphoma.

CT

CT scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.[1]

MRI

MRI scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.[1]

Ultrasound

On abdominal ultrasound, hepatosplenic T cell lymphoma is characterized by hepatomegaly and splenomegaly.

Other imaging findings

PET scan may be helpful in the diagnosis of hepatosplenic T cell lymphoma.[1]

Other Diagnostic Studies

Other diagnostic studies for hepatosplenic T cell lymphoma include laparoscopy, laparotomy, bone marrow aspiration, and bone marrow biopsy.[3]

Treatment

Medical Therapy

The predominant therapy for hepatosplenic T cell lymphoma is chemotherapy. Adjunctive stem cell transplant may be required.

References

  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 22, 2016
  2. 2.0 2.1 Recommendations. U.S Preventive Services Task Force. http://www.uspreventiveservicestaskforce.org/BrowseRec/Search?s=hepatosplenic+T+cell+lymphoma. Accessed on February 23, 2016
  3. 3.0 3.1 Hepatosplenic T cell lymphoma. Surveillance, Epidemiology, and End Results Program. http://seer.cancer.gov/seertools/hemelymph/51f6cf56e3e27c3994bd52ee/. Accessed on February 22, 2016


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