Differential diagnosis of polyuria (physiological,psychological,pathological causes )

. 1. Physiological :

_ winter months.

_ excess coffee or tea.

_ Diuretics.

2. Psychological :

_ Hysterical polydepsia.

_ Differs from D.I. : → fluid deprivation → normal.

→ no improvement after ADH.
3. Pathological :

a. Endocrinal :

i. D.I.

ii. D.M.

iii. Adrenal : Conn’s , Cushing’s , Addison’s.

iv. Thyroid : thyrotoxicosis.

v. Parathyroid : hyperparathyroidism.

b. Renal :

i. Nephrogenic DI : end organ unresponsiveness.

ii. Acute renal failure → diuretic phase.

iii. Chronic renal failure.

iv. Fanconi syndrome

c. Miscellaneous :

_ After attacks of

migraine, epilepsy, bronchial asthma &
see the pictures

paroxysmal tachycardia.