The diagnosis of TSC is made primarily on clinical manifestations. Most often, this diagnosis is not very difficult because, in adulthood, 95 % of the people present warning signs. It may, however, be less easy in children, with events more discrete.
The additional tests are looking for signs to establish the diagnosis of STB and possibly a complication which will require monitoring or special care.
The examination of the skin under light Wood helps highlight the spots achromiques.
The fundus research phacomes retinal.
Ultrasound renal research angiomyolipomas, tumors and cysts of the kidneys. The cardiac ultrasound highlights of rhabdomyomes.
The brain scan or the magnetic resonance imaging (MRI) to look for intracranial lesions evocative as tubers cortical nodules subependymal of astrocytoma giant cell.
Finally, a ct scan of the lungs is advised to adulthood in all women with STB to search for the lymphangioleiomyomatosis (LAM).
The identification of the genetic abnormality is usually not necessary to establish the diagnosis of the disease, but it is useful and may be essential in some cases, particularly in the context of genetic counselling in the home of a couple in which one partner is suffering from STB.