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High-Frequency Ultrasound Monitoring of Cutaneous Leishmaniasis During Treatment

6. november 2026 opdateret af: University of Brasilia

Treatment of Cutaneous Leishmaniasis: Serial Evaluation by High-Resolution Ultrasonography

This prospective observational cohort study evaluates changes in high-frequency skin ultrasound findings in patients with cutaneous leishmaniasis receiving routine clinical treatment at the University Hospital of Brasilia, Brazil. The primary outcome is clinical cure assessed three months after completion of treatment. Ultrasonography will characterize dermal and hypodermal thickness, echogenicity and color Doppler vascular signals over repeated examinations. Associations of baseline clinical, histopathological, and ultrasound findings with healing will be investigated. Participants will be followed for 12 months from treatment initiation to evaluate their clinical course, including relapse.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Patients with cutaneous leishmaniasis will be enrolled consecutively in a prospective, single-center observational cohort at the Leishmaniasis Outpatient Clinic, Dermatology Service, University Hospital of Brasilia (HUB), Brazil. The treating clinicians determine antiparasitic treatment according to routine care; the research protocol does not assign treatment.

The diagnosis will follow an established composite reference standard based on a compatible clinical presentation and parasitological confirmation (for example, direct smear, culture, molecular detection, or amastigotes identified on histopathology), or corroborating non-parasitological findings when parasitological confirmation is unavailable. Histopathological specimens obtained at baseline as part of diagnostic care are available for retrospective review and correlation with clinical and ultrasonographic findings.

Serial high-frequency ultrasound using a Clarius L20 handheld linear scanner (8-20 MHz), including B-mode and color Doppler examination, will assess lesion morphology, echogenicity, dermal and hypodermal thickness, and vascularity. The ultrasound schedule is at days 0, 15, 30, 45, and 90 from initiation of treatment. Clinical follow-up will occur during treatment and for up to 12 months from treatment initiation. No investigational drugs or treatment allocation are part of this observational study.

The primary endpoint is clinical cure at three months following completion of treatment, assessed by clinical examination. Secondary analyses will characterize longitudinal ultrasound changes, the relationship of baseline clinical and histopathological findings with ultrasound features, persistence of sonographic abnormalities at initial clinical cure assessment, and exploratory association of sonographic characteristics with subsequent relapse. Ultrasound findings will not themselves define clinical cure or demonstrate parasite viability.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

90

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Undersøgelse Kontakt Backup

Studiesteder

    • Federal District
      • Brasília, Federal District, Brasilien
        • Rekruttering
        • University Hospital of Brasilia - Leishmaniasis Outpatient Clinic

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Barn
  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Individuals of any age with confirmed cutaneous leishmaniasis evaluated in the Leishmaniasis Outpatient Clinic at University Hospital of Brasilia, Brazil.

Beskrivelse

Inclusion Criteria:

  • Cutaneous lesions clinically compatible with leishmaniasis and diagnosis confirmed according to the study's composite reference standard.
  • Evaluation at the Leishmaniasis Outpatient Clinic of the University Hospital of Brasilia.
  • Written informed consent from adults or a legally authorized representative's permission and age-appropriate assent for minors, as applicable.

Exclusion Criteria:

  • An alternative diagnosis established during diagnostic assessment.
  • No confirmed cutaneous leishmaniasis diagnosis.

Additional exclusions, if any, must be verified against the approved study protocol before release.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Observationsmodeller: COHORT
  • Tidsperspektiver: PROSPECTIVE

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
Patients With Cutaneous Leishmaniasis

Patients with confirmed cutaneous leishmaniasis receiving routine clinical treatment and undergoing repeated clinical and high-frequency ultrasound assessments.

Serial B-mode and color Doppler skin ultrasonography performed with the Clarius L20 (8-20 MHz) at days 0, 15, 30, 45, and 90 after initiation of clinically indicated treatment. This imaging procedure is for observation and does not determine drug allocation.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Proportion of Participants With Clinical Cure
Tidsramme: Three months after completion of routine treatment

Percentage of evaluable participants meeting the predefined clinical cure criteria at three months after completion of treatment, based on examination for complete re-epithelialization of ulcerative lesions and resolution or flattening of active inflammatory infiltration.

Three months after completion of routine treatment

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Longitudinal Change in Dermal Thickness
Tidsramme: Days 0, 15, 30, 45, and 90 after treatment initiation

Serial ultrasound measurement of dermal thickness (mm) in the followed cutaneous lesion.

Days 0, 15, 30, 45, and 90 after treatment initiation
Longitudinal Change in Sonographic Echogenicity
Tidsramme: Days 0, 15, 30, 45, and 90 after treatment initiation

Serial assessment of dermal and hypodermal lesion echogenicity on high-frequency ultrasound.

Days 0, 15, 30, 45, and 90 after treatment initiation
Presence of Color Doppler Vascular Signal
Tidsramme: Days 0, 15, 30, 45, and 90 after treatment initiation

Presence or absence of detectable color Doppler signal within the studied lesion at each scheduled visit; Doppler settings will be standardized.

Days 0, 15, 30, 45, and 90 after treatment initiation
Association Between Baseline Ultrasound and Histopathologic Features
Tidsramme: Baseline, prior to initiation of treatment

Exploratory assessment of associations between baseline sonographic morphological features and histopathological findings from the initially sampled lesion.

Baseline, prior to initiation of treatment
Residual Ultrasound Abnormalities at Initial Clinical Cure Assessment
Tidsramme: At first documented clinical cure, within 12 months after treatment initiation

Presence of persistent sonographic dermal, hypodermal, or vascular abnormalities at the visit when clinical cure is first identified.

At first documented clinical cure, within 12 months after treatment initiation
Occurrence of Cutaneous Leishmaniasis Relapse
Tidsramme: Up to 12 months after initiation of treatment

Clinical recurrence of cutaneous leishmaniasis after documented initial cure; operational definition of confirmed relapse and at-risk follow-up to be finalized.

Up to 12 months after initiation of treatment

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Ledende efterforsker: Neysa Aparecida Tinoco Regattieri, Universidade de Brasilia

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

8. januar 2025

Primær færdiggørelse (Anslået)

1. april 2028

Studieafslutning (Anslået)

1. april 2028

Datoer for studieregistrering

Først indsendt

6. november 2026

Først indsendt, der opfyldte QC-kriterier

6. november 2026

Først opslået (Faktiske)

13. november 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

13. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

6. november 2026

Sidst verificeret

1. november 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • PB-1838808
  • 56214021.6.0000.5558 (Anden identifikator: Plataforma Brasil / CEP-FM-UnB)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

deidentified study data will be published at dryad repository (https://datadryad.org/) after all publications related to the study are published

IPD-delingstidsramme

after publication of results, one year after conclusion, abril 2029

IPD-delingsadgangskriterier

Publicly evaluable, deidentified data

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL

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