Difference between revisions of "Gastric Squamous Cell Carcinoma - Horse"

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Also known as: '''''Gastric Neoplasia
 
Also known as: '''''Gastric Neoplasia
  
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==Diagnosis==
 
==Diagnosis==
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Diagnosis is usually made by exclusion of other causes of weight loss and '''gastroscopy'''.  '''Haematology''' may reveal a normocytic anaemia, neutrophilia, hypoalbuminaemia,<ref name="Olsen2">Olsen, S.N (1992) Squamous-cell carcinoma of the equine stomach: a report of 5 cases.  ''Vet Rec'', 131:170-173.</ref>hyperfibrinogenaemia and hyperglobulinaemia.<ref name="McKenzie">McKenzie, E.C, Mills, J.N, Bolton, J.R (1997) Gastric squamous cell carcinoma in three horses.  ''Aust Vet J'', 75(7):480-3.</ref>  '''Hypercalcaemia of malignancy''' may also be noted.<ref name="Talor">Taylor S.D, Haldorson, G.J, Vaughan, B, Pusterla, N (2009) Gastric neoplasia in horses.  ''J Vet Intern Med'', 23(5):1097-102.</ref>  [[Colic Diagnosis - Abdominocentesis|Abdominocentesis]] may demonstrate abnormal peritoneal effusions with neoplastic cells, inflammatory exudates<ref name="McKenzie">McKenzie, E.C, Mills, J.N, Bolton, J.R (1997) Gastric squamous cell carcinoma in three horses.  ''Aust Vet J'', 75(7):480-3.</ref> and elevated total protein concentrations.<ref>Tennant, B, Keirn, D.R, White, K.K, Bentinck-Smith, J, King, J.M (1982) Six cases of squamous cell carcinoma of the stomach of the horse.  ''Equine Vet J'', 14(3):238-43.</ref>  [[Colic Diagnosis - Abdominal Ultrasound|Abdominal ultrasound]] may also help to locate metastases.  The most common finding in the stomach at ''post-mortem'' is a single ulcerated, necrotic mass in the squamous region.<ref name="Talor">Taylor S.D, Haldorson, G.J, Vaughan, B, Pusterla, N (2009) Gastric neoplasia in horses.  ''J Vet Intern Med'', 23(5):1097-102.</ref>  There may also be nodules lining the peritoneum.<ref name="Olsen2">Olsen, S.N (1992) Squamous-cell carcinoma of the equine stomach: a report of 5 cases.  ''Vet Rec'', 131:170-173.</ref>
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Diagnosis is usually made by exclusion of other causes of weight loss and '''gastroscopy'''.  '''Haematology''' may reveal a normocytic anaemia, neutrophilia, hypoalbuminaemia,<ref name="Olsen2">Olsen, S.N (1992) Squamous-cell carcinoma of the equine stomach: a report of 5 cases.  ''Vet Rec'', 131:170-173.</ref>hyperfibrinogenaemia and hyperglobulinaemia.<ref name="McKenzie">McKenzie, E.C, Mills, J.N, Bolton, J.R (1997) Gastric squamous cell carcinoma in three horses.  ''Aust Vet J'', 75(7):480-3.</ref>  '''Hypercalcaemia of malignancy''' may also be noted.<ref name="Talor">Taylor S.D, Haldorson, G.J, Vaughan, B, Pusterla, N (2009) Gastric neoplasia in horses.  ''J Vet Intern Med'', 23(5):1097-102.</ref>  [[Abdominocentesis]] may demonstrate abnormal [[Colic - Peritoneal Fluid Analysis|peritoneal effusions]] with neoplastic cells, inflammatory exudates<ref name="McKenzie">McKenzie, E.C, Mills, J.N, Bolton, J.R (1997) Gastric squamous cell carcinoma in three horses.  ''Aust Vet J'', 75(7):480-3.</ref> and elevated total protein concentrations.<ref>Tennant, B, Keirn, D.R, White, K.K, Bentinck-Smith, J, King, J.M (1982) Six cases of squamous cell carcinoma of the stomach of the horse.  ''Equine Vet J'', 14(3):238-43.</ref>  [[Colic Diagnosis - Abdominal Ultrasound|Abdominal ultrasound]] may also help to locate metastases.  The most common finding in the stomach at ''post-mortem'' is a single ulcerated, necrotic mass in the squamous region.<ref name="Talor">Taylor S.D, Haldorson, G.J, Vaughan, B, Pusterla, N (2009) Gastric neoplasia in horses.  ''J Vet Intern Med'', 23(5):1097-102.</ref>  There may also be nodules lining the peritoneum.<ref name="Olsen2">Olsen, S.N (1992) Squamous-cell carcinoma of the equine stomach: a report of 5 cases.  ''Vet Rec'', 131:170-173.</ref>
  
 
==Treatment and Prognosis==
 
==Treatment and Prognosis==
 
In most cases, surgical resection is not possible<ref>East, L.M, Savage, C.J (1998) Abdominal neoplasia (excluding urogenital tract).  ''Vet Clin North Am Equine Pract'', 14:475-493.  In: Zimmel, D.N (2010) ''Neoplasia of the Alimentary Tract'' in Reed, S.M, Bayly, W.M. and Sellon, D.C (2010) '''Equine Internal Medicine''' (Third Edition), ''Saunders'', Chapter 15.</ref> and the prognosis is grave, with a short survival time after diagnosis.<ref name="Talor">Taylor S.D, Haldorson, G.J, Vaughan, B, Pusterla, N (2009) Gastric neoplasia in horses.  ''J Vet Intern Med'', 23(5):1097-102.</ref>
 
In most cases, surgical resection is not possible<ref>East, L.M, Savage, C.J (1998) Abdominal neoplasia (excluding urogenital tract).  ''Vet Clin North Am Equine Pract'', 14:475-493.  In: Zimmel, D.N (2010) ''Neoplasia of the Alimentary Tract'' in Reed, S.M, Bayly, W.M. and Sellon, D.C (2010) '''Equine Internal Medicine''' (Third Edition), ''Saunders'', Chapter 15.</ref> and the prognosis is grave, with a short survival time after diagnosis.<ref name="Talor">Taylor S.D, Haldorson, G.J, Vaughan, B, Pusterla, N (2009) Gastric neoplasia in horses.  ''J Vet Intern Med'', 23(5):1097-102.</ref>
  
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[[Category:Colic - Gastric Causes]]
 
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[[Category:Stomach Disorders - Horse]]
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[[Category:Neoplasia]]

Latest revision as of 16:02, 6 July 2012


Also known as: Gastric Neoplasia

Introduction

Squamous cell carcinoma is the most common primary tumor of the equine stomach.[1] It can affect the cardia and upper squamous regions of the stomach, resulting in a persistent mild colic, commonly seen soon after feeding. The tumor can invade and metastasize to lymph nodes, the lungs and regions palpable on rectal examination.[1]

See also: Colic, Gastric Causes

Clinical Signs

The main clinical signs include weight loss and general ill health.[2] Other signs may include anorexia, lethargy, abdominal distension, hypersalivation, pyrexia, tachypnoea, reduced borborygmi[3] and abnormal chewing and swallowing behaviour.[4] Hypertrophic osteopathy associated with this neoplastic disease has been reported in one horse.[5]

Diagnosis

Diagnosis is usually made by exclusion of other causes of weight loss and gastroscopy. Haematology may reveal a normocytic anaemia, neutrophilia, hypoalbuminaemia,[4]hyperfibrinogenaemia and hyperglobulinaemia.[6] Hypercalcaemia of malignancy may also be noted.[3] Abdominocentesis may demonstrate abnormal peritoneal effusions with neoplastic cells, inflammatory exudates[6] and elevated total protein concentrations.[7] Abdominal ultrasound may also help to locate metastases. The most common finding in the stomach at post-mortem is a single ulcerated, necrotic mass in the squamous region.[3] There may also be nodules lining the peritoneum.[4]

Treatment and Prognosis

In most cases, surgical resection is not possible[8] and the prognosis is grave, with a short survival time after diagnosis.[3]


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References

  1. ↑ 1.0 1.1 Olsen, S.N (1992) Squamous-cell carcinoma of the equine stomach: a report of 5 cases. Vet Rec, 131:170-173. In: Zimmel, D.N (2010) Neoplasia of the Alimentary Tract in Reed, S.M, Bayly, W.M. and Sellon, D.C (2010) Equine Internal Medicine (Third Edition), Saunders, Chapter 15.
  2. ↑ Merck & Co (2008) The Merck Veterinary Manual (Eighth Edition), Merial.
  3. ↑ 3.0 3.1 3.2 3.3 Taylor S.D, Haldorson, G.J, Vaughan, B, Pusterla, N (2009) Gastric neoplasia in horses. J Vet Intern Med, 23(5):1097-102.
  4. ↑ 4.0 4.1 4.2 Olsen, S.N (1992) Squamous-cell carcinoma of the equine stomach: a report of 5 cases. Vet Rec, 131:170-173.
  5. ↑ Schleining, J.A, Voss, E.D (2004) Hypertophic osteopathy secondary to gastric squamous cell carcinoma in a horse. Equine Vet Educ, 16:304-307. In: Zimmel, D.N (2010) Neoplasia of the Alimentary Tract in Reed, S.M, Bayly, W.M. and Sellon, D.C (2010) Equine Internal Medicine (Third Edition), Saunders, Chapter 15.
  6. ↑ 6.0 6.1 McKenzie, E.C, Mills, J.N, Bolton, J.R (1997) Gastric squamous cell carcinoma in three horses. Aust Vet J, 75(7):480-3.
  7. ↑ Tennant, B, Keirn, D.R, White, K.K, Bentinck-Smith, J, King, J.M (1982) Six cases of squamous cell carcinoma of the stomach of the horse. Equine Vet J, 14(3):238-43.
  8. ↑ East, L.M, Savage, C.J (1998) Abdominal neoplasia (excluding urogenital tract). Vet Clin North Am Equine Pract, 14:475-493. In: Zimmel, D.N (2010) Neoplasia of the Alimentary Tract in Reed, S.M, Bayly, W.M. and Sellon, D.C (2010) Equine Internal Medicine (Third Edition), Saunders, Chapter 15.


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