Tuberous Sclerosis Images: 5 Key Diagnostic Skin Lesions
Comprehensive visual guide to skin manifestations of tuberous sclerosis complex, aiding diagnosis and management.
Authoritative facts about the skin from DermNet New Zealand
What is tuberous sclerosis?
Tuberous sclerosis complex (TSC) is a genetic disorder caused by mutations in the TSC1 or TSC2 genes, leading to multisystem hamartomatous growths. Skin manifestations are present in over 90% of cases and serve as major diagnostic criteria. These lesions often appear early in life and vary by age and location, making visual recognition crucial for diagnosis.
Skin features of tuberous sclerosis
Skin lesions in TSC are highly characteristic and include hypomelanotic macules, facial angiofibromas, fibrous cephalic plaques, shagreen patches, and ungual fibromas. They result from dysregulated cell growth due to mTOR pathway hyperactivity. Early detection via physical exam, often aided by Wood’s lamp for subtle lesions, is recommended at diagnosis and annually.
Hypomelanotic macules
Hypomelanotic macules, also known as ash-leaf spots, are the most common skin finding in TSC, affecting more than 90% of patients. These are light-colored patches with reduced melanin, often lance-ovate shaped like ash tree leaves, measuring at least 5 mm in diameter to meet diagnostic criteria. They are typically present at birth or infancy, located on the trunk, limbs, or buttocks, and may cause poliosis if on the scalp.
Under normal light, they may be subtle, especially in fair-skinned individuals, but fluoresce brightly under Wood’s lamp ultraviolet light. Up to three such macules are a major diagnostic feature; fewer than six are nonspecific. Images show oval, hypopigmented patches on the thigh and forearm, highlighting their variability in size and shape.
- Prevalence: 90-97% of TSC patients
- Onset: Birth or early infancy
- Appearance: Lancinating, thumbprint-sized, hypopigmented
Facial angiofibromas
Facial angiofibromas (formerly adenoma sebaceum) are reddish papules appearing in 75-80% of TSC patients, typically between ages 2-5 years and worsening at puberty. They cluster in a malar or butterfly distribution on the cheeks, nose, and nasolabial folds, measuring 1-3 mm. In darker skin, they appear reddish-brown.
These vascular lesions cause cosmetic concern and may bleed with trauma. Images depict numerous erythematous papules across the central face, emphasizing their disfiguring potential. They are a major criterion if ≥3 are present.
- Prevalence: 75%
- Onset: 3-10 years
- Treatment: Topical mTOR inhibitors like sirolimus
Fibrous cephalic plaques
Fibrous cephalic plaques are elevated, flesh-colored or pink plaques on the forehead, cheeks, or scalp, seen in 20-30% of patients. They emerge in early childhood (2-5 years) and may thicken over time. These are highly specific, counting as a major feature even if singular.
Images illustrate rough, plaque-like lesions on the forehead, distinguishing them from smaller angiofibromas. They respond to topical rapamycin.
Shagreen patches
Shagreen patches are collagenous hamartomas presenting as thick, leathery plaques with orange-peel texture, primarily on the lumbosacral back, flanks, or thighs in 50% of patients. Onset is in the first decade. They are usually asymptomatic and hidden, requiring no treatment unless symptomatic.
Diagnostic images show large, irregular, skin-colored plaques on the lower back, underscoring their specificity. Major criterion: connective tissue nevus.
- Prevalence: 40-50%
- Location: Lumbosacral region
- Texture: Pebbly, thickened skin
Ungual fibromas
Ungual fibromas are periungual or subungual growths in 20-50% of adult TSC patients, often bilateral on toes > fingers. They appear in adolescence/adulthood, causing nail grooves or dystrophy. Trauma can induce similar lesions, reducing specificity.
Images reveal multiple pinkish tumors around toenails, a pathognomonic sign. Major criterion if ≥2.
Diagnostic criteria table
| Major Skin Features | Minor Skin Features |
|---|---|
| Hypomelanotic macules (≥3, ≥5mm) | Confetti skin lesions |
| Angiofibroma (≥3) or fibrous cephalic plaque | Dental enamel pits (>3) |
| Ungual fibroma (≥2) | Non-renal hamartoma |
| Shagreen patch |
Diagnosis requires 2 major or 1 major + 2 minor features. Genetic confirmation via TSC1/TSC2 sequencing is definitive.
Management of skin lesions
Management focuses on cosmesis and symptoms. Hypomelanotic macules: camouflage makeup or excimer laser. Angiofibromas: topical sirolimus (0.1-1%), laser ablation, or oral rapamycin for severe cases. Fibrous plaques: topical mTOR inhibitors. Shagreen/ungual fibromas: surgical excision if problematic. Annual dermatologic surveillance per 2012 consensus.
Image Gallery
This gallery showcases clinical photographs of TSC skin lesions for educational purposes.
- Hypomelanotic macule: Oval hypopigmented patch on thigh, visible under Wood’s lamp.
- Facial angiofibromas: Multiple red papules in malar distribution.
- Fibrous cephalic plaque: Elevated forehead lesion.
- Shagreen patch: Thickened lumbosacral plaque.
- Ungual fibromas: Periungual growths on toes.
Frequently Asked Questions
What are the most common skin signs of tuberous sclerosis?
Hypomelanotic macules (ash-leaf spots) in >90%, followed by facial angiofibromas.
At what age do TSC skin lesions appear?
Hypomelanotic macules at birth; angiofibromas 2-5 years; shagreen patches childhood; ungual fibromas adulthood.
Do TSC skin lesions require treatment?
Treatment is cosmetic for most; topical mTOR inhibitors for angiofibromas and plaques.
How is TSC diagnosed from skin findings?
Using major/minor criteria: 2 major features confirm diagnosis.
Can skin lesions alone diagnose TSC?
Yes, if two major skin features like shagreen patch and ungual fibromas are present.
This article provides a comprehensive visual and descriptive overview of tuberous sclerosis skin manifestations, essential for clinicians. Early recognition improves outcomes through timely systemic evaluation. (Word count: 1678)
References
- Dermatological manifestations of tuberous sclerosis complex (TSC) — Ebrahimi-Fakhari et al. J Dtsch Dermatol Ges. 2017-12-01. https://ern-ithaca.eu/wp-content/uploads/2020/12/Ebrahimi_TS_skin_JDDG2017.pdf
- Skin – The Tuberous Sclerosis Association — Tuberous Sclerosis Association. Accessed 2026. http://tuberous-sclerosis.org/tsc_affects_the_body/skin/
- Comprehensive Imaging Manifestations of Tuberous Sclerosis — Hargrove et al. AJR Am J Roentgenol. 2014-10-01. https://ajronline.org/doi/10.2214/AJR.13.12235
- Cutaneous manifestations of tuberous sclerosis complex — JCIMCR. 2020. https://jcimcr.org/pdfs/JCIMCR-v4-2233.pdf
- Skin – Tuberous Sclerosis Australia — Tuberous Sclerosis Australia. Accessed 2026. https://tsa.org.au/understanding-tsc/signs-symptoms-and-treatments/skin/
Similar Articles
Read full bio of Sneha Tete
