Which endocrine combination is cited as extra-GI causes of chronic diarrhea?

Which endocrine combination is cited as extra-GI causes of chronic diarrhea?

• A. Addison's disease (dogs) and hyperthyroidism (cats)
• B. Hypothyroidism
• C. Cushing's disease
• D. Diabetes mellitus

Answer: (A)

Endocrine disorders outside the GI tract can present with chronic diarrhea because they disrupt systems that influence gut function, such as hormonal balance, metabolism, and fluid balance. Addison’s disease in dogs and hyperthyroidism in cats are classic examples: in dogs, cortisol and mineralocorticoid deficiencies lead to poor intestinal absorption, electrolyte disturbances, and reduced gut perfusion, all of which can produce long-standing diarrhea; in cats, the excess thyroid hormone increases metabolic rate and gut motility with increased secretions, commonly causing loose stools. This combination is cited as an extra-GI cause of chronic diarrhea because the diarrhea arises from systemic hormonal disease rather than primary intestinal pathology. Hypothyroidism typically causes constipation rather than diarrhea; Cushing’s disease can have GI signs but is not a primary or most characteristic cause of chronic diarrhea; diabetes mellitus can have GI manifestations but is not the classic pair associated with chronic diarrhea in the same way Addison’s disease in dogs and hyperthyroidism in cats are.

Endocrine disorders outside the GI tract can present with chronic diarrhea because they disrupt systems that influence gut function, such as hormonal balance, metabolism, and fluid balance. Addison’s disease in dogs and hyperthyroidism in cats are classic examples: in dogs, cortisol and mineralocorticoid deficiencies lead to poor intestinal absorption, electrolyte disturbances, and reduced gut perfusion, all of which can produce long-standing diarrhea; in cats, the excess thyroid hormone increases metabolic rate and gut motility with increased secretions, commonly causing loose stools. This combination is cited as an extra-GI cause of chronic diarrhea because the diarrhea arises from systemic hormonal disease rather than primary intestinal pathology.

Hypothyroidism typically causes constipation rather than diarrhea; Cushing’s disease can have GI signs but is not a primary or most characteristic cause of chronic diarrhea; diabetes mellitus can have GI manifestations but is not the classic pair associated with chronic diarrhea in the same way Addison’s disease in dogs and hyperthyroidism in cats are.