Clinical trial NCT04644523: Dermoscopy in Primary Raynaud's Phenomenon
Official title: Prospective Validation of 5 Items in Nailfold Dermoscopy to Predict a Normal Capillaroscopy in Raynaud's Phenomenon
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Raynaud Phenomenon
Keywords: Dermoscopy
Nailfold capillaroscopy
Lead sponsor: Assistance Publique - Hôpitaux de Paris
Sponsor class: OTHER
First posted: 2020-11-25
Enrollment: 100
Sex: ALL
Minimum age (years): 19
Standard ages: ADULT
OLDER_ADULT
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Patients with Raynaud's phenomenon requiring capillaroscopy

Brief summary: Raynaud's phenomenon (RP) is very frequent in general population (up to 10%). Nailfold capillaroscopy (NFC) is recommended for patients presenting RP, to eliminate systemic disease such as systemic sclerosis. NFC is not easily available in clinical practice. Dermoscopy, used for pigmentary skin lesion screening, may help to detect giant loops, hemorrhages or other capillaries anomalies. However, no study has evaluated the performance of dermoscopy in primary RP. The objective is to determinate which items in dermoscopy are correlated with a normal NFC and predict with a good negative predictive value, a normal NFC in RP patients. The secondary objective is to assess inter-observer reproducibility of dermoscopy in patients with RP.

Detailed description: Raynaud's phenomenon (RP) is very frequent in general population (up to 10%). Nailfold capillaroscopy (NFC) is recommended for patients presenting RP, to eliminate systemic disease such as systemic sclerosis. NFC is not easily available in clinical practice. Dermoscopy, used for pigmentary skin lesion screening, may help to detect giant loops, hemorrhages or other capillaries anomalies. However, no study evaluated the performance of dermoscopy in primary RP. A preliminary study (Tenon Hospital) showed an interest of dermoscopy in primary and secondary RP, with a negative predictive value of dermoscopy of 100% for capillaroscopy.

This is a prospective, multicentric French study comparing dermoscopy and capillaroscopy in patients attending dermatology or vascular medicine departments for the first evaluation of a RP.

The objective is to determinate which items in dermoscopy are correlated with a normal NFC and predict with a good negative predictive value, a normal NFC in RP patients. The secondary objective is to assess inter-observer reproducibility of dermoscopy in patients with RP.

The main hypothesis is that a normal dermocopy on five items is highly predictive of a normal NFC.

During a first consultation for RP, NFC will be realized with a clinical exam and a biological test (antinuclear antibodies), as official recommendations. Dermoscopy of peri-ungueal area will be realized by another investigator, if possible during the same consultation. Photographs of all fingers, except thumbs, will be made and will be reviewed by another investigator of another center. There will be no follow-up.

Eligibility criteria: Inclusion Criteria:

* age \> 18 years
* first consultation for bilateral Raynaud's phenomenon (RP)
* Bilateral Raynaud's phenomenon affecting at least one finger of each hand defined by a paroxysmal syncopal phase on exposure to cold,
* Affiliated to the French health care systeme

Exclusion Criteria:

* age \< 18 years
* Presence of unilateral RP where the capillaroscopy is normal regardless of the cause

Primary outcomes:
measure: Dermoscopic items
timeFrame: November 2022
Secondary outcomes:
measure: Photography
timeFrame: November 2022
Other outcomes:
Locations:
city: Paris
country: France
facility: Hôpital de Tenon
Study officials:
References: