N25-N29: Other disorders of kidney and ureter

N27: Small kidney of unknown cause

Small kidney of unknown cause, clinically categorized under the ICD-10 code N27, represents a group of renal conditions characterized by smaller than normal kidney size with no identifiable causative factor. Generally, the exact cause remains unidentified, which makes this disease especially complex to manage. Patients with a small kidney of unknown cause often display symptoms including, but not limited to, blood in urine, high blood pressure, recurrent urinary tract infections, back or side pain, and swelling of hands and feet. This condition hampers the normal functioning of the kidneys, leading to reduced waste filtration and uncontrolled electrolyte balance in the body. Over time, it can progress to more serious stages including chronic kidney disease if left undetected or untreated. It's crucial to note that symptom presence, severity, and disease progression can significantly vary between individuals.