LENTIGO SPECIFIC TARGET (LST) THERAPY
Single-Session Precision Targeting for Solar Lentigines
Dr. Kim Dongha’s proprietary LST technique designed for clean, one-time clearance.
OUR PHILOSOPHY
Our Approach to Lentigo Care
LETIGO / LST
“With an accurate diagnosis, a solar lentigo is a lesion that can be cleared in surprisingly few sessions; with a misdiagnosis, it can become a years-long struggle.
The challenge is that brown spots on the face often look identical on the surface. Solar lentigines, melasma, seborrheic keratosis, and ABNOM each require entirely different clinical approaches, yet they can be difficult to distinguish with the naked eye alone.
Applying high-energy lasers without careful differentiation can cause some lesions to fade while making others darker. Experiences like “a mark remained after spot removal” or “it faded and then returned” usually start at this point.
In lentigo care, the phase where I spend the most time is before the procedure itself. I evaluate the exact depth of the pigment, confirm whether it is genuinely a solar lentigo, and assess how the skin will respond to thermal energy. Once the diagnosis is precise, treating a solar lentigo becomes remarkably straightforward.”
Dr. Kim Dongha
Sinsa Kim Dongha Dermatology
WHY OUR LST THERAPY
What Makes Lentigo Treatment at Sinsa Kim Dongha Dermatology Distinct
Proprietary LST (Lentigo Specific Target) Protocol
Our LST protocol combines the Enlighten SR Pico laser with specialized Micro-Lens Array (MLA) optics, custom-calibrated in-house by Sinsa Kim Dongha Dermatology
to match the precise depth and density of lentigo lesions.
Single-Session Targeting Philosophy
Using our proprietary 532nm LST technique on Enlighten SR, our goal is to clear large sun spots
in a single, uniform treatment without leaving grid-like marks.
Diagnostic Precision Before Treatment
Solar lentigines require a different approach from other pigmentation disorders. We check the location and number of lesions, whether melasma is also present, and
whether there are any signs of malignancy — accurate diagnosis always comes first.
Clean Results Maintained After 1 Year
Using a wide 6mm+ beam spot on the 532nm wavelength, we remove only the lentigo pigment
while preserving surrounding tissue, leaving skin that stays clear even 1 year post-treatment.
Temporary redness as fresh skin emerges subsides within 1 month.
Customized Energy Calibration
Excessive fluence in an attempt to clear pigment immediately can lead to post-inflammatory hyperpigmentation (PIH).
We calibrate energy output based on individual skin type, lesion status, and recovery capacity
to prevent post-treatment marks.
Officially Certified Enlighten Practice
Sinsa Kim Dongha Dermatology is an officially certified clinic for Cutera’s Enlighten Pico laser,
cleared for safety and efficacy by the US FDA and Korean KFDA.
BEFORE & AFTER
After One Treatment Session
Temporary mild redness as new skin recovers, fully returning to the surrounding skin tone within 1 month.
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※ Individual treatment outcomes may vary depending on skin condition.
BEFORE & AFTER
One Treatment Session, 1 Year Post-Treatment
Clean, recurrence-free clarity maintained 1 year post-treatment.
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※ Individual treatment outcomes may vary depending on skin condition.
BENEFITS & PROCESS
Proprietary Single-Session Lentigo Clearance
Rather than ten toning sessions, a single treatment plus careful aftercare during the first two weeks determines the final result.
Solar lentigines are characterized by an irregular dermal-epidermal junction and deep pigment ridging.
Clinical TechniqueUsing Enlighten SR 532nm LST paired with
specialized MLA (micro-lens array) optics, our proprietary technique applies a uniform 6mm+ spot size
to clear large lentigines in a single precise session without leaving grid-line boundaries.
STEP 1
Treatment DayPrecision Diagnosis & 532 LST Treatment
Enlighten SR Pico laser targets lentigo pigment precisely while sparing surrounding normal skin
STEP 2
Immediately to Week 2Protective Dressing (DuoDERM)
An occlusive healing dressing maintains a moist healing environment.
Retaining the dressing continuously for 2 weeks is essential as the skin heals underneath
STEP 3
Week 2 Clinic VisitDressing Removal & Crust Clearance
Safe removal of the dressing at the clinic
The fragmented pigment comes away cleanly along with the crust, revealing clear, pinkish fresh skin underneath
STEP 4
Week 3 OnwardPIH Prevention & Home Care
If mild redness or subtle PIH appears, gentle Revlite SI spot toning is performed every 2 weeks
Diligent daily sun protection
* Recovery progress may vary depending on individual skin and lesion characteristics.
IDEAL CANDIDATES
Is LST Therapy Right for You?
Patients with deep melasma that has not responded to repeated laser toning
Patients with dull, reddish melasma and flushing over the cheekbones that makes the face look uneven
Patients with large, flat, smooth-to-the-touch solar lentigines that have not cleared after several laser treatments
Patients who experienced repeated recurrence because melasma, solar lentigines, and seborrheic keratoses were not correctly distinguished
OUR PROCESS
Our 5-Step Treatment Process
From consultation to post-treatment care, Dr. Kim Dongha oversees every step of your journey.
STEP 1
Doctor’s Consultation
Reviewing skin concerns, daily habits, and previous treatment history
STEP 2
Skin Diagnostics
The clinician identifies the pigmentation using Mark-Vu imaging and a magnifying loupe
STEP 3
Customized Treatment Design
Formulating a targeted LST plan based on lesion size, depth, and skin type
STEP 4
Targeted Treatment
Performed directly by Dr. Kim Dongha, adjusting depth and energy in real time
STEP 5
Aftercare
Calming skin care, progress review, and personalized home care guidance
TREATMENT INFO
At-a-Glance Summary
| Item | Solar Lentigo |
|---|---|
| Clinical Characteristics | Well-demarcated epidermal pigment lesion |
| Featured Equipment | Enlighten SR Pico Laser with the Lentigo Specific Target protocol (LST therapy) |
| Treatment Frequency | Typically 1 session (minor follow-up only for unusually deep pigment) |
| Duration | Approx. 10 to 20 minutes |
| Downtime | DuoDERM dressing applied for 2 weeks until the crust naturally clears |
| Recommended Season | Autumn to spring (September to April) |
| Numbing & Comfort Care | Topical numbing cream |
※ Individual treatment outcomes and recovery periods may vary depending on skin condition.