The diagnostic criteria for tuberous sclerosis complex (TSC) were revised at the Tuberous Sclerosis Complex Consensus Conference, July 1998.
Definite TSC: Two major features or one major feature plus two minor features
Probable TSC: One major feature plus one minor feature
Possible TSC: One major feature or two or more minor features
- Facial angiofibromas or forehead plaque
- Nontraumatic ungual or periungual fibromas
- Hypomelanotic macules (three or more)
- Shagreen patch (connective tissue nevus)
- Multiple retinal nodular hamartomas
- Cortical tuber 1
- Subependymal nodule
- Subependymal giant cell astrocytoma
- Cardiac rhabdomyoma, single or multiple
- Lymphangiomyomatosis 2
- Renal angiomyolipoma 2
- Multiple randomly-distributed pits in dental enamel
- Hamartomatous rectal polyps
- Bone cysts
- Cerebral white matter radial migration lines 1,3
- Gingival fibromas
- Nonrenal hamartoma
- Retinal achromic patch
- "Confetti" skin lesions
- Multiple renal cysts
1. Cerebral cortical dysplasia and cerebral white matter migration tracts occurring together are counted as one rather than two features of TSC.
2. When both lymphangiomyomatosis and renal angiomyolipomas are present, other features of tuberous sclerosis must be present before TSC is diagnosed.
3. White matter migration lines and focal cortical dysplasia are often seen in individuals with TSC; however, because these lesions can be seen independently and are relatively nonspecific, they are considered a minor diagnostic criteria for TSC.