Anal Sac Adenocarcinoma

Signalment

Have only been confirmed in dogs although they may occur in cats. Predisposed breeds include:

• 

  English Cocker Spaniels

• 

  Springer Spaniels

• 

  Daschunds

• 

  Alaskan Malamutes

• 

  German Shepherds

and mixed-breed dogs

• Mainly older bitches (90%)

Description

A highly malignant neoplasia that readily metastasizes to the medial iliac lymph nodes. May also lead to paraneoplastic hypercalcaemia due to parathyroid hormone-related peptide.

Diagnosis

History and Clinical Signs

See Anal Sac Disease - General Also:

• Flattened stools
• Pernieal swelling
• Hypercalcaemia signs including polydipsia and polyuria.

References

Hall, E.J, Simpson, J.W. and Williams, D.A. (2005) BSAVA Manual of Canine and Feline Gastroenterology (2nd Edition) BSAVA

Merck & Co (2008) The Merck Veterinary Manual