Collecting duct

Looks like

Straight tubes gathering urine from many nephrons down through the pyramids.

What it does

Adjust how much water is kept, under the control of antidiuretic hormone.

Keeping it well

Lithium can make them unresponsive (nephrogenic diabetes insipidus); constant thirst and large volumes of urine need checking.

Related conditions

• Acute kidney injury
• Amyloidosis (AL and ATTR)
• Bladder cancer
• Chronic kidney disease
• Dehydration & electrolyte disorders
• Diabetes insipidus (arginine vasopressin deficiency)
• Diabetic ketoacidosis
• Glomerulonephritis
• Haemolytic uraemic syndrome
• Hantavirus infection
• High blood pressure
• Hydronephrosis
• Hyperparathyroidism
• IgA nephropathy
• Kidney cancer
• Kidney infection
• Kidney stones
• Lead poisoning
• Leptospirosis (Weil's disease)
• Nephrotic syndrome
• Poisoning & overdose
• Polycystic kidney disease
• Pre-eclampsia
• Renal artery stenosis
• Rhabdomyolysis
• SIADH (inappropriate antidiuretic hormone)
• Systemic lupus erythematosus
• Thrombotic thrombocytopenic purpura (TTP)
• Toxic shock syndrome
• Tuberous sclerosis complex
• Vesicoureteral reflux
• Wilms tumour (nephroblastoma)
• Yellow fever