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Created page with "*these are important surgically since splenomegaly can be diagnoses clinically by palpation or X-ray and some tumours are surgically curable ====Hyperplastic Nodules or Benign L..."
*these are important surgically since splenomegaly can be diagnoses clinically by palpation or X-ray and some tumours are surgically curable
====Hyperplastic Nodules or Benign Lymphoma====
*very common incidental findings in older dogs
*should not be mistakenly identified as pathognomic lesions
*consist of nodules of hyperplastic white and red pulp
:- usually 1-2 cms in size, but occasionally may be larger
:- spherical
:- protrude hemispherically from the surface as yellow and red mottled nodules
*infrequently, may rupture and give rise to haemorrhage
====Haemangioma====
*benign tumour of dogs
*may grow to considerable size
:- the size of the lesion giving rise to clinical signs is compounded by haemorrhage from and into the tumour
:- thus, a large mass of apple size may be found protruding from the spleen and adherent to the omentum
*on section, it is largely blood clot
*responds well to surgery
:- therefore it must be distinguished from haemangiosarcoma
====Haemangiosarcoma====
*highly malignant tumour of dogs
*distinguished from the superficially similar haemangioma by the presence of much more formed, solid tumour tissue
*accurate prognosis demands histological examination
*secondaries are common locally in the [[Peritoneal cavity - Anatomy & Physiology#Omentum|omentum]] and in the [[Liver - Anatomy & Physiology|liver]]
:- course is usually short, often only a month or two
:- metastases may occur in almost every organ
====Haematopoietic Neoplasms====
=====lymphosarcoma=====
* splenomegaly occurs in multicentric lymphosarcoma
*splenic enlargement may be marked if any form of lymphosarcoma is in leukaemic phase
=====myeloid (granulocytic) leukaemia=====
*rare
*all species
*extreme form with spleen approaching liver size
=====systemic mastocytosis=====
*cat
*extreme form with spleen approaching liver size
[[Category:Spleen - Pathology]]
[[Category:To Do - Blood]]
====Hyperplastic Nodules or Benign Lymphoma====
*very common incidental findings in older dogs
*should not be mistakenly identified as pathognomic lesions
*consist of nodules of hyperplastic white and red pulp
:- usually 1-2 cms in size, but occasionally may be larger
:- spherical
:- protrude hemispherically from the surface as yellow and red mottled nodules
*infrequently, may rupture and give rise to haemorrhage
====Haemangioma====
*benign tumour of dogs
*may grow to considerable size
:- the size of the lesion giving rise to clinical signs is compounded by haemorrhage from and into the tumour
:- thus, a large mass of apple size may be found protruding from the spleen and adherent to the omentum
*on section, it is largely blood clot
*responds well to surgery
:- therefore it must be distinguished from haemangiosarcoma
====Haemangiosarcoma====
*highly malignant tumour of dogs
*distinguished from the superficially similar haemangioma by the presence of much more formed, solid tumour tissue
*accurate prognosis demands histological examination
*secondaries are common locally in the [[Peritoneal cavity - Anatomy & Physiology#Omentum|omentum]] and in the [[Liver - Anatomy & Physiology|liver]]
:- course is usually short, often only a month or two
:- metastases may occur in almost every organ
====Haematopoietic Neoplasms====
=====lymphosarcoma=====
* splenomegaly occurs in multicentric lymphosarcoma
*splenic enlargement may be marked if any form of lymphosarcoma is in leukaemic phase
=====myeloid (granulocytic) leukaemia=====
*rare
*all species
*extreme form with spleen approaching liver size
=====systemic mastocytosis=====
*cat
*extreme form with spleen approaching liver size
[[Category:Spleen - Pathology]]
[[Category:To Do - Blood]]