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Living with Mesangiocapillary glomerulonephritis, type II

A kidney condition, also called dense deposit disease, that causes protein and blood in the urine and swelling.

Understanding Mesangiocapillary glomerulonephritis, type II

Mesangiocapillary glomerulonephritis type II, also called dense deposit disease (DDD), is a condition that mainly affects kidney function.

Main symptoms come from the kidneys not working well. They often include protein in the urine, blood in the urine, less urine, low blood protein, and swelling in many body areas. It starts in childhood. Most cases occur by chance with no family history.

Signs & symptoms

GARD doesn't list a separate symptom list, but its summary describes these:

  • Protein in the urine
  • Blood in the urine
  • Less urine than usual
  • Low blood protein
  • Swelling in many parts of the body

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include genetic specialists and kidney specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    NephCure Kidney International may keep lists of experts for this condition.

Care & treatment

Care team
Genetic specialists (geneticists); Kidney specialists (nephrologists)
Expert care
Expert lists: NephCure Kidney International
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with NephCure Kidney International and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Should I have C3 and CFH genetic testing?
How will kidney function be monitored?
Which specialists, such as nephrologists, should be on my care team?

Quick facts

Symptoms usually startChild
InheritanceAutosomal Recessive

It can have genetic or non-genetic causes. Changes in the C3 and CFH genes can cause it. It can also result from genetic risk and environmental triggers, or from autoantibodies that block immune system proteins.

GeneticKidney

Also known as: dense deposit disease; dense deposit disease / membranoproliferative glomerulonephritis type ii; mcgn (mesangiocapillary glomerulonephritis) type ii; membranoproliferative glomerulonephritis type 2; mesangiocapillary glomerulonephritis type 2; mpgn 2

Patient organizations

Source: NIH GARD · Mesangiocapillary glomerulonephritis, type IIGARD ID 8555 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Mesangiocapillary glomerulonephritis, type II.

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