Complement 4 deficiency
# Complement 4 deficiency

Complement tests :

| C4 (C) | FB (A) | C3 | CH50 | Conditions |
| - | - | - | - | - |
| · | ↓ | ↓ | ↓ | PSG, C3 NeF AA |
| ↓ | · | ↓ | · | HAE, C4D |
| · | · | · | ↓ | TCPD |
| ↓ | · /↓ | ↓ | ↓ | SLE |
| ↑ | ↑ | ↑ | ↑ | inflammation |

Complement 4 deficiency is a genetic condition affecting complement component 4.

It can present with lupus-like symptoms.

