The PKD medical abbreviation most often stands for polycystic kidney disease, an inherited condition in which many fluid-filled sacs, called cysts, grow in both kidneys. Over many years the cysts can enlarge the kidneys and slowly reduce how well they work.
You will usually see PKD in kidney clinic notes, ultrasound and imaging reports, genetic test results and problem lists, often with an extra letter in front that names the inheritance pattern. In blood disorder notes, PKD can instead mean pyruvate kinase deficiency, a cause of anemia. This page covers both meanings and the companion abbreviations found in kidney notes.
At a glance
Stands for
Polycystic kidney disease (most common)Other meanings
Pyruvate kinase deficiency, a red blood cell enzyme disorderMain types
ADPKD (autosomal dominant) and ARPKD (autosomal recessive)Where you see it
Nephrology notes, renal ultrasound reports, genetics resultsDo not confuse with
Simple kidney cysts, which are common and usually harmlessSpecialty
Nephrology, genetics, hematology
What the PKD medical abbreviation means in kidney care
In polycystic kidney disease, cysts form throughout the tissue of both kidneys and grow over time. As they enlarge, they crowd out normal kidney tissue. People may notice high blood pressure, back or side pain, blood in the urine, kidney stones or urinary infections, though many have no symptoms for years.
Over decades, many people with PKD develop chronic kidney disease, and some eventually reach kidney failure. Cysts can also appear in the liver, and some families have a higher risk of brain aneurysms. How fast it progresses differs a lot from person to person.
ADPKD and ARPKD compared
Notes nearly always add a prefix to show which inherited form is present.
| Feature | ADPKD | ARPKD |
|---|---|---|
| Full name | Autosomal dominant polycystic kidney disease | Autosomal recessive polycystic kidney disease |
| How common | The most common inherited kidney disease | Rare |
| Usual age found | Adulthood, often 30s or 40s | Before birth or in infancy |
| Inheritance | One changed gene from one parent is enough | A changed gene from each parent |
| Main genes | PKD1 and PKD2 | PKHD1 |
Because ADPKD passes from parent to child with about a one in two chance in each pregnancy, family members are often offered screening.
How PKD shows up in a real record
Kidney notes stack several abbreviations together. Here is a typical history line decoded.
| Piece | Meaning |
|---|---|
| PMH | Past medical history |
| ADPKD | Autosomal dominant polycystic kidney disease |
| CKD stage 3a | Chronic kidney disease with moderately reduced function |
| HTN | High blood pressure, very common in PKD |
| renal US | Kidney ultrasound |
In a nephrology plan: "ADPKD with rising TKV, eGFR 58, discuss tolvaptan." TKV is total kidney volume measured on imaging, eGFR estimates kidney filtering, and tolvaptan is the generic name of a medicine used to slow cyst growth in some adults.
Pyruvate kinase deficiency as a second meaning
In hematology, PKD can mean pyruvate kinase deficiency, an inherited lack of an enzyme that red blood cells need for energy. Without enough of it, red cells break down early, causing hemolytic anemia, with tiredness, pale skin, jaundice and sometimes an enlarged spleen. Some writers use PKLR or PK deficiency to avoid confusion.
The setting usually makes it clear: a kidney ultrasound, eGFR or cysts point to the kidney disease, while hemoglobin, bilirubin and red cell tests point to the enzyme disorder.
Questions to ask a kidney specialist
- Which type of PKD do I have, and was it confirmed by genetic testing?
- How fast is my kidney function changing?
- Should my children or siblings be screened?
- Which blood pressure target is right for me?
Polycystic kidney disease varies a great deal between people. A kidney specialist or genetic counselor can walk you through your own results and their meaning for relatives.
Frequently asked questions
What does PKD stand for in medical terms?
PKD most often means polycystic kidney disease, an inherited condition that causes many cysts in both kidneys. In hematology, it can also mean pyruvate kinase deficiency, a cause of anemia.
What is the difference between PKD and ADPKD?
ADPKD is the most common type of PKD, the autosomal dominant form usually found in adults. PKD is the general name, and the extra letters say how it is inherited.
Is PKD the same as having kidney cysts?
No. Simple kidney cysts are common, especially with age, and usually harmless. PKD means many cysts in both kidneys from an inherited condition.
Is PKD inherited?
Yes, both main types are inherited. ADPKD can pass from one affected parent, while ARPKD needs a changed gene from each parent.
How is PKD diagnosed?
It is usually found with kidney imaging such as ultrasound, CT or MRI, often along with family history. Genetic testing can confirm the type in some cases.