Eponyms beginning with J
- Jaeger-Vacca method
- Jaffe-Campanacci syndrome
- Jaffe-Lichtenstein dysplasia
- Jaffe-Lichtenstein fibrous dysplasia
- Jaffe-Lichtenstein syndrome
- Jaffe-Lichtenstein-Sutro syndrome
- Jaffe-Lichtenstein-Uehlinger syndrome
- Jaffe’s syndrome
- Jaffe’s syndrome II
- Jahnke's syndrome (variant without glaucoma)
- Jakob-Creutzfeldt disease
- Jakob-Creutzfeldt pseudosclerosis
- Jakob’s pseudosclerosis
- Jaksch Wartenhorst's syndrome
- Jaksch' anaemia
- Jaksch-Hayem syndrome
- Jaksch’ syndrome
- Jaksch’s syndrome
- Janet's disease
- Jansky-Bielschowsky disease
- Jansky-Bielschowsky syndrome
- Janus syndrome
- Janz' syndrome
- Jarcho's syndrome
- Jarcho-Levin syndrome