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Laser Angioplasty
Laser angioplasty, also called excimer laser atherectomy or CLiRPATH, is a catheter procedure using pulsating laser beams to vaporize arterial plaque instead of a balloon; niche use remains after early trials showed no restenosis benefit.
Laser capsulotomy
Laser capsulotomy, or YAG laser posterior capsulotomy, is an outpatient ophthalmic procedure using an Nd:YAG laser to open the clouded lens capsule after cataract surgery.
Laser coagulation
Laser coagulation is a medical procedure using focused laser light to heat tissue and denature proteins, sealing vessels or destroying lesions; in the retina it is called photocoagulation.
Laser Corneal Surgery
Laser corneal surgery (LASIK, PRK/TransPRK, SMILE) reshapes the cornea with excimer or femtosecond lasers to correct myopia, hyperopia, and astigmatism; evidence shows comparable efficacy and predictability across modern techniques.
Laser Doppler flowmetry
Laser Doppler flowmetry is a non-invasive optical technique that measures blood flow in tissue from the Doppler shift of laser light scattered by moving red blood cells.
Laser Doppler imaging
Laser Doppler imaging (LDI) is a non-contact optical technique that maps blood perfusion in skin and superficial tissue by scanning a low-power laser beam across the surface.
Laser interstitial thermal therapy
Laser interstitial thermal therapy (LITT) is a minimally invasive neurosurgical procedure in which a laser fiber, inserted through a small skull opening, destroys brain tumors, radiation necrosis, or epileptic foci under real-time MRI temperature monitoring.
Laser lithotripsy
Laser lithotripsy is an endourological procedure that fragments kidney, ureteral, or bladder stones by delivering pulsed laser energy through an optical fiber inside a ureteroscope or nephroscope.
Laser photocoagulation
Laser photocoagulation is an outpatient eye procedure in which a focused laser seals retinal leaks or destroys abnormal tissue, mainly treating diabetic retinopathy and retinal tears.
Laser resurfacing
Laser resurfacing is a dermatologic procedure using CO2 and Er:YAG lasers to remove or heat skin layers, treating wrinkles, acne scars, and photoaging, with fractional ablative CO2 considered the gold standard.
Laser speckle flowgraphy
Laser speckle flowgraphy (LSFG) is a noninvasive optical imaging method that maps blood flow in the ocular fundus by measuring how moving red blood cells blur a laser speckle pattern.
Laser surgery
Laser surgery is a surgical technique using focused laser light to cut, ablate, or coagulate tissue, chosen by wavelength and pulse duration, as in LASIK.
Laser tattoo removal
Laser tattoo removal is a dermatologic treatment that uses short, high-intensity laser pulses to fragment tattoo pigment so the body clears it, usually requiring 4 to 15 sessions.
Laser-assisted cataract surgery
Laser-assisted cataract surgery, also known as femtosecond laser cataract surgery, uses a femtosecond laser for incisions, capsulotomy, and lens fragmentation, while phacoemulsification and lens insertion stay manual.
LASIK
LASIK (Laser-Assisted In Situ Keratomileusis) is eye surgery in which a hinged corneal flap is folded back and an excimer laser reshapes the cornea to treat refractive errors.
Lasker Award
The Lasker Award, also called the Lasker Prize, is an annual American prize for biomedical research given by the Albert and Mary Lasker Foundation since 1946.
Lasmiditan
Lasmiditan (Reyvow, formerly COL-144/LY573144) is a selective 5-HT1F receptor agonist, the first ditan, FDA-approved 11 October 2019 for acute migraine in adults; non-vasoconstricting, 50-200 mg, one dose per 24 h, 8-hour driving restriction, Schedule V.
Lasofoxifene
Lasofoxifene (CP-336,156; Fablyn, Oporia) is an oral third-generation SERM for postmenopausal osteoporosis, EU-approved 2009 but never marketed, now in Phase 3 (ELAINE-3) for ESR1-mutant ER+ breast cancer.
Lassa fever
Lassa fever, an acute viral hemorrhagic illness caused by Lassa virus (Arenaviridae), is endemic in West Africa, spread by Mastomys multimammate rats; about 80% of infections are mild, but severe disease kills 15% or more of hospitalized patients.
Lasunadi ghrta
Lasunadi ghrta (Laśunādi ghṛta, लशुनादि घृत) is a classical Ayurvedic medicated ghee with garlic as principal ingredient, listed in the Ayurvedic Formulary of India (AFI000167, 12 g dose) for gulma and vata disorders, and studied in depression and infertility trials.
Lasunadi Vati
Lasunadi Vati (Laśunādi vaṭī, Lashunadi Vati) is a garlic-based classical Ayurvedic tablet, official in the Ayurvedic Formulary of India (AFI000132, 1 g dose), used for indigestion, diarrhea, and related digestive disorders.
Latah
Latah (melatah), a Southeast Asian culture-specific startle syndrome of Malaysia and Indonesia, marked by exaggerated startle with echolalia, echopraxia, coprolalia, and forced obedience, mainly in Malay women; debated as disorder versus social role.
Latanoprost
Latanoprost (Xalatan) is a prostaglandin F2α analogue eye drop, first US-approved 1996, that lowers intraocular pressure in open-angle glaucoma and ocular hypertension via increased uveoscleral outflow, dosed once daily at 0.005%.
Latanoprostene bunod
Latanoprostene bunod (Vyzulta) is a nitric oxide-donating prostaglandin F2α analogue eye drop, FDA approved November 2017, that lowers intraocular pressure in open-angle glaucoma and ocular hypertension via a dual outflow mechanism.
Latarjet procedure
The Latarjet procedure stabilizes a shoulder with recurrent anterior instability by transferring the coracoid process and its attached tendon to the glenoid, fixed with screws.
Late congenital neurosyphilis
Late congenital neurosyphilis (juvenile neurosyphilis; ICD-10 A50.4, ICD-11 1A60.3) is nervous-system syphilis in children with congenital syphilis, appearing after age 2 with juvenile paresis, tabes dorsalis, deafness, and keratitis, treated with penicillin G.
Late congenital syphilis, latent
Late congenital syphilis, latent (ICD-11 1A60.5) is asymptomatic, seroreactive congenital syphilis in older infants and children, evaluated with CSF and treated with 10 days of IV penicillin G.
Late effects of cerebrovascular disease
Late effects of cerebrovascular disease (ICD-11 8B25; ICD-10 I69) are persisting residual symptoms after stroke or intracranial hemorrhage, including spasticity, depression, cognitive impairment, dementia, and recurrent stroke risk.
Late effects of Hodgkin lymphoma treatment
Late effects of Hodgkin lymphoma treatment are long-term toxicities appearing in the roughly 85% of survivors cured, mainly second cancers, cardiovascular and lung disease, infertility, and endocrine dysfunction.
Late gadolinium enhancement
Late gadolinium enhancement is a cardiac magnetic resonance imaging technique in which injected gadolinium contrast highlights scar and fibrosis, marking irreversible injury and predicting outcomes.