Medical Oncologist
CION Cancer Clinics
After a positive TSC1 or TSC2 result: your next steps | CION Cancer Clinics
A positive TSC1 or TSC2 result confirms tuberous sclerosis complex, or confirms that you carry the gene fault behind it. What happens next is a set of baseline checks across the brain, kidneys, heart, eyes, skin and lungs, a plan for regular surveillance, and testing for close relatives. Care is usually shared between several specialists. This page walks through the first months after the result. At CION Cancer Clinics, our oncologists explain what a gene result means for you and your family, and plan the checks that follow.
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Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed September 2026, next review due September 2027
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On this page
- What does a positive TSC1 or TSC2 result mean for you?
- Which specialists will be involved?
- What happens after the result, step by step?
- The words you will meet, in plain language
- What changes now, and what does not
- Four things families tell us, and what is actually true
- What this page cannot tell you
- Common questions after a positive TSC1 or TSC2 result
The short answer
What does a positive TSC1 or TSC2 result mean for you?
It confirms tuberous sclerosis complex, or confirms the gene fault behind it. The next steps are baseline checks of the brain, kidneys, heart, eyes, skin and, for women, the lungs, followed by a plan for regular surveillance and an offer of testing for close relatives. Most of what is found will be benign.
A result is not a prediction of severity
The same fault can cause frequent seizures in one person and only a few skin changes in another, even within one family. The result tells your doctors what to look for. It does not tell them what they will find. That picture comes from the baseline scans and from how things change over the following years.
Why it matters even if you feel well
Many adults learn they have tuberous sclerosis only when their child is diagnosed. They may have lived normal, healthy lives. The result still matters, because kidney growths can grow quietly for years, and regular scans are the way to catch them early.
Take the first few weeks slowly. Very little needs to happen urgently unless you already have symptoms.Your care team
Which specialists will be involved?
Tuberous sclerosis touches several organs, so care is shared. One doctor should hold the overall plan.
Genetic counsellor
Explains the result, draws the family tree, and helps you decide who else to test and how to tell them. Counselling in Telugu can be arranged.
Neurologist
Looks after seizures and brain scans, and usually leads care in childhood. They also arrange checks of learning and behaviour.
Kidney specialist
Follows kidney growths and kidney function for life, and controls blood pressure. Often the lead doctor in adult life.
Others, as needed
Not everyone needs all of these.
- Chest specialist, for women's lung checks
- Skin, eye and dental specialists
- Heart specialist, mainly for babies
- Psychologist, for learning and behaviour
- Oncologist, if a growth might be cancer
Not sure whether this applies to you?
Ask an oncologistThe first few months
What happens after the result, step by step?
A results appointment
A counsellor or doctor goes through the report with you. Write your questions down beforehand, and bring a family member who can help you remember.
Baseline checks
Brain MRI, kidney scan, blood pressure, a kidney blood test, eye and skin examinations, a dental check and, for women, a lung scan. Babies and children also have a heart scan and an EEG.
A written surveillance plan
Once baseline results are in, your team sets which checks to repeat and when. Keep a copy, with the date each check is next due.
Testing the family
Parents, brothers and sisters, and children are offered a check. The counsellor can give you a letter to share with them.
On your report
The words you will meet, in plain language
- Tuberous sclerosis complex
- The condition caused by a TSC1 or TSC2 fault. It is often shortened to TSC.
- Pathogenic variant
- A change in the gene known to stop it working. This is the result that confirms tuberous sclerosis.
- Heterozygous
- One copy of the gene carries the fault and the other copy does not. This is the usual finding.
- Baseline
- The first full set of checks after diagnosis. Later scans are compared against it.
- mTOR inhibitor
- A tablet, such as everolimus or sirolimus, that calms the growth signal and can shrink several kinds of growth.
- TAND
- Short for TSC-associated neuropsychiatric disorders. It covers learning, behaviour, mood and autism-related difficulties.
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Side by side
What changes now, and what does not
What changes
What stays the same
You will have regular scans for life
Work, study and daily life usually carry on
Blood pressure and kidneys are checked every year
Most growths stay benign
Close relatives can be tested
Their result will not predict how affected they are
Pregnancy planning has new options
You can still have children
Women review oestrogen-containing medicines
Most other medicines are used as normal
Commonly believed
Four things families tell us, and what is actually true
"A positive result means I will get cancer."
Tuberous sclerosis mainly causes benign growths. Kidney cancer is uncommon, though it is watched for. Most people with the condition never develop cancer.
"Tuberous sclerosis always means epilepsy and learning difficulty."
Many people have both, but not everyone. Some adults have only skin or kidney findings and have worked and raised families without knowing they had the condition.
"Nothing can be done except wait."
A great deal can be done. mTOR tablets shrink brain, kidney and some lung growths. Seizures can often be controlled, and early support helps with learning. Surveillance means growths are dealt with before they cause harm.
"Someone in the family did something to cause this."
Nobody caused it. In most families the fault appeared by chance in one person. When it is inherited, it can come from either parent. Nothing in pregnancy, diet or behaviour is to blame.
Being straight with you
What this page cannot tell you
It cannot tell you what your result means for you. The exact variant, what your scans show and your own history all shape the plan. What your specific variant means is a question for the counsellor who ordered the test.
Who this does not apply to
If your report lists a TSC1 or TSC2 change found only in a tumour, for example in bladder or kidney cancer, you do not have tuberous sclerosis. That result is about the cancer, and it is covered under targeted therapy. A variant of uncertain significance is also not a diagnosis, and should not start surveillance on its own.
Insurance and cost in India
India has no specific law against genetic discrimination by insurers. If you are thinking about new health or life cover, raise it with your counsellor. Ask the hospital's scheme desk whether Aarogyasri or Ayushman Bharat covers any part of your scans or treatment.
Where the evidence is thin
Much of the guidance is based on expert agreement rather than large trials. It is still the best guide available.
Questions we are asked
Common questions after a positive TSC1 or TSC2 result
Do I need to see a cancer doctor?
Not usually. Tuberous sclerosis is mainly looked after by neurology and kidney teams. A cancer specialist becomes involved when a growth might be cancer, most often in the kidney, or when a growth needs treatment that a cancer team provides.
How soon do the baseline checks need to happen?
Over the following few months, in most cases. They are not an emergency unless there are symptoms such as seizures, severe headaches or pain in the side. Babies and young children with seizures are seen quickly.
Can I still have children?
Yes. Each child has a one in two chance of inheriting the fault. Options include testing during pregnancy or testing embryos made by IVF. Women should plan pregnancy with their team, as kidney growths and some medicines need review first.
Should I tell my employer or my child's school?
You do not have to tell an employer. For children, telling the school often helps, especially if there are seizures or learning needs. A short doctor's letter explaining what the school should know is usually enough.
Will I need to take medicines for life?
Not necessarily. Many people need no regular medicine. Seizure medicines are needed if there is epilepsy. mTOR tablets are used when a growth is enlarging, and if they work well, they are often continued long term.
What if the result came back as a variant of uncertain significance?
That means the laboratory found a change and does not know yet whether it matters. It is not a diagnosis. Your doctor will look at whether you have clinical signs of tuberous sclerosis and decide from those. Ask how you will hear if the result is reclassified.
Is tuberous sclerosis a reason to avoid marriage?
No. Many people with the condition marry and have families. Whether and when to share the diagnosis with a future spouse is a personal decision. A counsellor can help you think it through and explain the condition clearly to both families.
Where can I get help in Telugu?
Genetic counselling in Telugu can be arranged, so you and your family can ask questions in the language you think in. Call the CION helpline and ask for a genetics appointment. The same number serves every CION centre.
Your Specialists
Meet CION's oncologists. Bring your family history or genetic report to them.
Our medical oncologists see people with a strong family history of cancer, arrange genetic counselling and testing where it fits, and plan the checks that follow.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
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Sources
- GeneReviews (NCBI) — Tuberous Sclerosis Complex
- MedlinePlus Genetics — Tuberous sclerosis complex
- NHS — Tuberous sclerosis
- National Cancer Institute — Genetics of Kidney Cancer (Renal Cell Cancer) (PDQ)
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Surveillance for TSC1 and TSC2 carriersThe full list of checks, and roughly whenTesting the family for TSC1 and TSC2Who in the family to check firstTuberous sclerosis and kidney tumoursThe growths most likely to need treatment in adult lifeTSC1 and TSC2 mutation: which cancers and what riskHow much cancer risk the result really carries
Talk to us
Just received a TSC1 or TSC2 result?
Bring the report and we will explain what the next few months should look like and which checks to book first. We can also arrange counselling for the family, in Telugu if you prefer. One helpline serves every CION centre.