Genetics

Solving the Puzzle: How Gorlin Syndrome is Diagnosed

At a Glance

Gorlin syndrome is diagnosed clinically using a specific set of major and minor criteria, such as multiple basal cell skin cancers, jaw cysts, and palmar pits. A definitive diagnosis requires meeting two major criteria, one major and two minor criteria, or having a positive genetic test.

Diagnosing Gorlin syndrome—also known as Nevoid Basal Cell Carcinoma Syndrome (NBCCS)—is like putting together a medical puzzle. Doctors look for specific pieces, known as major and minor criteria, to confirm the condition ^[1]^[2]. A diagnosis is typically made if you have two major criteria or one major and two minor criteria ^[3]^[4].

Today, genetic testing to identify a mutation in genes like PTCH1 or SUFU is increasingly used to provide a definitive answer, especially in children who may not yet show all the physical signs ^[5]^[6].

The Major Criteria

These are the most common and significant signs of the syndrome:

Multiple Basal Cell Carcinomas (BCCs): Developing more than two BCCs, or one BCC before age 20, is a key indicator ^[7]^[3]. These skin cancers may appear as pearly bumps or flesh-colored patches ^[8].
Odontogenic Keratocysts (OKCs): These are aggressive, non-cancerous cysts in the jawbone that are often seen on dental X-rays ^[9]^[10]. They can cause swelling or pain, and in Gorlin syndrome, they are often “multifocal” (occurring in several places) and have a higher chance of returning after surgery ^[11]^[12].
Palmar or Plantar Pits: These are small, permanent indentations (like tiny pin-pricks) on the palms of the hands or soles of the feet ^[3]^[13]. They are often easier to see after the skin has been wet for a few minutes ^[13].
Calcification of the Falx Cerebri: This is a “silent” feature where calcium deposits form in a specific membrane of the brain. It is usually found on a skull X-ray or CT scan and typically appears before age 20 ^[14]^[15].
Skeletal Anomalies: The most common is a bifid rib (a rib that is split or forked) or ribs that are unusually fused together ^[16]^[7].
Family History: Having a first-degree relative (parent or sibling) already diagnosed with the syndrome ^[2].

The Minor Criteria

These features are less common but help support a diagnosis:

Macrocephaly: A larger-than-average head size ^[3]^[7].
Congenital Malformations: Such as a cleft lip or palate, or “frontal bossing” (a prominent, protruding forehead) ^[16]^[7].
Other Skeletal Issues: Such as polydactyly (extra fingers or toes) or unusual shapes in the bones of the spine (scoliosis) ^[16]^[7].
Ovarian or Cardiac Fibromas: Non-cancerous tumors that can grow in the ovaries or the heart muscle ^[16]^[17].
Medulloblastoma: A specific type of childhood brain tumor ^[17]^[4].

Evolving Criteria: What’s New?

Medical knowledge is always advancing, and researchers have proposed adding new features to the diagnostic list:

Basaloid Follicular Hamartomas (BFHs): These are small, benign skin growths that can look very similar to early BCCs but behave differently ^[18]^[19].
Synophrys: Better known as a “unibrow,” this feature has been found to be quite common in some groups of people with Gorlin syndrome and may soon be added as a minor criterion ^[20].

If you don’t meet all the criteria yet, don’t panic. Because the syndrome is progressive, some features may not appear until later in life ^[4]. This is why genetic testing is so valuable—it can confirm the diagnosis early, allowing for a personalized screening plan to keep you one step ahead ^[5]^[21].

Common questions in this guide

How is Gorlin syndrome diagnosed?

A diagnosis is typically made when a patient has two major clinical criteria, or one major and two minor criteria. Genetic testing can also provide a definitive diagnosis by identifying mutations in specific genes like PTCH1 or SUFU.

What are the major criteria for Gorlin syndrome?

Major signs include developing multiple basal cell skin cancers (or one before age 20), jaw cysts, small pits on the palms or soles, calcium deposits in a specific brain membrane, split or fused ribs, and having a first-degree relative with the condition.

Why is a dental X-ray used to diagnose Gorlin syndrome?

Dental X-rays, particularly panoramic ones, can reveal odontogenic keratocysts. These are aggressive but non-cancerous cysts in the jawbone that can be 'silent' or symptom-free early on, and they serve as a major hallmark for diagnosing the syndrome.

Can you have Gorlin syndrome without meeting all the diagnostic criteria?

Yes, because the syndrome is progressive, some physical features may not appear until later in adulthood. This is especially true for children, which is why genetic testing is often recommended to confirm a diagnosis early before all signs develop.

What are palmar and plantar pits?

Palmar and plantar pits are small, permanent indentations that look like tiny pin-pricks on the palms of the hands or soles of the feet. They are a classic diagnostic sign of Gorlin syndrome and often become easier to see after your hands or feet have been wet.

Curated prompts to bring to your next appointment.

1.Do I currently meet the formal clinical criteria for Gorlin syndrome based on my symptoms?
2.Can you review my chest X-ray and head CT for specific markers like bifid ribs or calcification of the falx cerebri?
3.How can we distinguish between my typical 'moles' and early-onset basal cell carcinomas or basaloid follicular hamartomas?
4.Is a baseline panoramic dental X-ray necessary now to check for 'silent' jaw cysts?
5.Does my genetic test result confirm the diagnosis even if I don't meet all the physical criteria yet?

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References (21)

1
Genetic aspects of Gorlin‒Goltz syndrome
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2
A Rare Case of Gorlin-Goltz Syndrome in Children.
Boos Lima FBDJ, Viana APC, Lima LHF, et al.
Case reports in dentistry 2019; (2019()):1608783 doi:10.1155/2019/1608783.
PMID: 31934460
3
Further Expanding the Mutational Spectrum of Gorlin Syndrome in Three Unrelated Families.
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Molecular syndromology 2024; (15(3)):175-184 doi:10.1159/000535407.
PMID: 38841331
4
Proposed criteria for nevoid basal cell carcinoma syndrome in children assessed using statistical optimization.
Gold NB, Campbell IM, Sheppard SE, Tan WH
Scientific reports 2021; (11(1)):19791 doi:10.1038/s41598-021-98752-9.
PMID: 34611197
5
Clinical and genetic profiling of nevoid basal cell carcinoma syndrome in Korean patients by whole-exome sequencing.
Kim B, Kim MJ, Hur K, et al.
Scientific reports 2021; (11(1)):1163 doi:10.1038/s41598-020-80867-0.
PMID: 33441926
6
Medulloblastoma With Metastasis to the Jaw in a Child With Nevoid Basal Cell Carcinoma Syndrome: A Case Report.
Cartrite M, Yang D, Farr B, Stone J
Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons 2019; (77(11)):2279-2284 doi:10.1016/j.joms.2019.06.007.
PMID: 31310734
7
A case of nevoid basal cell carcinoma syndrome dominated by facial basal cell carcinoma.
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Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences 2022; (47(3)):384-389 doi:10.11817/j.issn.1672-7347.2022.200925.
PMID: 35545332
8
Studying the multiple faces of nevoid basal-cell carcinoma syndrome: A case series.
Saxena S, Sundaragiri KS, Bhargava A, Sankhla B
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PMID: 33456241
9
Clinical, radiographic, pathological and inherited characteristics of odontogenic keratocyst in nevoid basal cell carcinoma syndrome: a study in three Chilean families.
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Oral radiology 2023; (39(3)):518-527 doi:10.1007/s11282-022-00664-5.
PMID: 36436193
10
Conservative management of multiple odontogenic keratocysts in a child with nevoid basal cell carcinoma syndrome: A case report.
de Arruda JAA, de Lima KFA, de Oliveira Filho OV, et al.
Special care in dentistry : official publication of the American Association of Hospital Dentists, the Academy of Dentistry for the Handicapped, and the American Society for Geriatric Dentistry 2024; (44(5)):1383-1392 doi:10.1111/scd.13007.
PMID: 38685572
11
Recurrence Patterns of Odontogenic Keratocysts in Syndromic and Non-Syndromic Patients.
Van Cleemput T, Jackers X, Piagkou M, Politis C
Journal of maxillofacial and oral surgery 2024; (23(1)):152-158 doi:10.1007/s12663-023-01920-9.
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12
Nevoid Basal Cell Carcinoma Syndrome: A Long-Term Study in a Family.
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Craniomaxillofacial trauma & reconstruction 2016; (9(1)):94-104 doi:10.1055/s-0035-1558454.
PMID: 26889355
13
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14
New mutations and an updated database for the patched-1 (PTCH1) gene.
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16
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18
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20
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21
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This page explains the clinical diagnostic criteria for Gorlin syndrome for educational purposes only. Always consult a geneticist, dermatologist, or qualified healthcare provider for a formal medical evaluation.

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