Pseudo-Hyperparathyroidism

• Non-endocrine tumours may be capable of secreting hormones, or hormone-like factors.
  • A parathormone-like substance may be secreted in such a manner.

Apocrine Gland Adenocarcinoma

• Malignant tumours of the anal sac apocrine glands can produce PTH-related peptide (PTHrp).
  • This induces a pseudo-hyperparathyroidism and hypercalcaemia.

Lymphosarcoma

• 10 to 40% of cases in dogs may cause a pseudo-hyperparathyroidism.

Other Carcinomas

Some other carcinomas may also be capable of causing pseudo-hyperparathyroidism.