Infections |
Bacterial |
- Streptococcal infection (the most common infectious cause)
- Tuberculosis
- Leprosy
- Yersinia, Salmonella, Campylobacter gastroenteritis
- Mycoplasma pneumonia
- Tularemia
- Leptospirosis
- Brucellosis
- Chlamydia trachomatis
- Psittacosis
- Lymphogranuloma venereum
- Cat-scratch disease
- Q fever (Coxiella burnetii infection)
|
Fungal |
- Coccidioidomycosis
- Histoplasmosis
- Blastomycosis
|
Viral |
- Infectious mononucleosis
- Hepatitis B
- Paravaccinia
|
Drugs |
Oral contraceptives |
Penicillin |
Sulfonamides |
Bromides and iodides |
TNF-alpha inhibitors (rare) |
Inflammatory bowel disease |
Crohn's disease (more often than ulcerative colitis) |
Ulcerative colitis |
Malignancy |
Lymphoma (Hodgkin, most often) |
Leukemia (acute myelogenous, most often) |
Internal carcinomas |
Miscellaneous |
Sarcoidosis |
Pregnancy |
Whipple disease |
Behçet disease |
Sweet syndrome |