References of "Pierard, Gérald"
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See detailPhotoaging under recreational sunbeds.
QUATRESOOZ, Pascale ULg; HENRY, Frédérique ULg; PAQUET, Philippe ULg et al

in Skin Research & Technology (2011)

Background: Artificial sources of restricted light wavelength, particularly tanning beds, are progressively gaining importance in photoaging. Objective: To assess the kinetics and the long-term evolution ... [more ▼]

Background: Artificial sources of restricted light wavelength, particularly tanning beds, are progressively gaining importance in photoaging. Objective: To assess the kinetics and the long-term evolution of skin pigmentation and tensile functions in sunbed worshippers over a period of 8 years. Methods: Photoaging was explored in women who were both sunshine and sunbed worshippers. A series of 65 phototype III women aged 31-46 years completed a 100-month survey. Quarterly assessments were performed on the forearms to measure (a) the skin color individual typology angle (ITA degrees ), (b) the extent in mottled subclinical melanoderma (MSM) using the ultraviolet light-enhanced visualization method and (c) the rheological properties of skin. Results: A progressive increase in both skin extensibility and hysteresis was observed, contrasting with a decrease in biologic elasticity. These rheological changes were correlated with the ITA degrees changes, but not with the MSM extent. The kinetics of evolution of each test variable were distinct over time. Discussion: This work is the first attempt at evaluating the kinetics of changes in physical parameters during a long period of frequent exposures to tanning sunbeds and sunshine for lifestyle purposes. The alterations were quite important in the color, MSM and rheological functions of the skin. [less ▲]

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See detailFacing up to the imperceptible perspiration. Modulatory influences by diabetic neuropathy, physical exercise and antiperspirant.
Xhauflaire-Uhoda, E.; Mayeux, G.; Quatresooz, Pascale ULg et al

in Skin Research & Technology (2011)

Background: Sweating is variably altered by physical exercise, diabetic neuropathy and antiperspirants. Methods: Skin temperature, skin surface water loss (SSWL), the Corneometer((R)) average capacitance ... [more ▼]

Background: Sweating is variably altered by physical exercise, diabetic neuropathy and antiperspirants. Methods: Skin temperature, skin surface water loss (SSWL), the Corneometer((R)) average capacitance (CMAC) and skin capacitance mapping (SCM) were measured before and after moderate physical exercise in 20 healthy subjects. The effect of 5% aluminium chloride hexahydrate (ACH) in a water solution was similarly tested. The same assessments were performed in 20 diabetic patients at rest. Results: Diabetic neuropathy appeared at rest as an increased (compensatory) SCM on the forearms without obvious modification on the hypohidrotic legs. On ACH sites after exercise, SCM revealed both a lowered number of active sweat glands and a lighter stratum corneum (SC) (dryness). In addition, CMAC and SSWL were decreased on ACH sites at rest and at completion of exercise. Conclusion: In diabetic neuropathy, the compensatory hyperhidrosis is more easily disclosed than the hypohidrosis. ACH affects both sweat excretion and the SC hydration. [less ▲]

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See detailComment j'explore...le meli-melo des ichtyoses.
Hermanns-Le, Trinh ULg; REGINSTER, Marie-Annick ULg; QUATRESOOZ, Pascale ULg et al

in Revue Médicale de Liège (2011), 66(2), 102-8

Ichthyoses are hereditary and sometimes acquired diseases of keratinisation. They are heterogeneous according to their clinical and histopathological presentations, as well as to the nature of their ... [more ▼]

Ichthyoses are hereditary and sometimes acquired diseases of keratinisation. They are heterogeneous according to their clinical and histopathological presentations, as well as to the nature of their molecular and genetic alterations. We present the most frequent types of hereditary ichthyoses. [less ▲]

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See detailIntroduction a l'analyse spectrale des reseaux microvasculaires du melanome cutane primitif.
Quatresooz, Pascale ULg; Pierard, Gérald ULg; FRANCHIMONT, Claudine ULg et al

in Pathologie Biologie (2010), 60

Cutaneous malignant melanoma represents one of the most dramatic skin cancers because its incidence is steadily growing in White populations. Of note, its metastatic risk and mortality dramatically ... [more ▼]

Cutaneous malignant melanoma represents one of the most dramatic skin cancers because its incidence is steadily growing in White populations. Of note, its metastatic risk and mortality dramatically increase when the primary neoplasm reaches about one millimeter thick. It is believed that angiogenesis and lymphangiogenesis associated with cutaneous melanoma potentially influence the neoplastic progression of the primary tumor and its metastases. In some instances, both the intratumoral and peritumoral microvasculature are correlated to booming of the tumoral growth fraction. In addition, the vascular network serves as a migration path for the intravascular and perivascular neoplastic spread. Hence, the quantification of the microvasculature might help establishing a prognostic factor of evolution. Among the available methods, spectral analysis of immunohistochemical sections highlighting vessels helps defining the microvasculature distribution. The benefit of using spectral analysis is discussed and the modalities of application of this analytical method are scrutinized. [less ▲]

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See detailLe botryomycome.
Wauters, Odile ULg; Sabatiello, Murielle ULg; Nikkels, Nazli ULg et al

in Annales de Dermatologie et de Vénéréologie (2010), 137(3), 238-42237243

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See detailIntroduction a l'analyse spectrale des reseaux microvasculaires du melanome cutane primitif.
Quatresooz, Pascale ULg; PIERARD, Gérald ULg; FRANCHIMONT, Claudine ULg et al

in Pathologie et Biologie (2010)

Cutaneous malignant melanoma represents one of the most dramatic skin cancers because its incidence is steadily growing in White populations. Of note, its metastatic risk and mortality dramatically ... [more ▼]

Cutaneous malignant melanoma represents one of the most dramatic skin cancers because its incidence is steadily growing in White populations. Of note, its metastatic risk and mortality dramatically increase when the primary neoplasm reaches about one millimeter thick. It is believed that angiogenesis and lymphangiogenesis associated with cutaneous melanoma potentially influence the neoplastic progression of the primary tumor and its metastases. In some instances, both the intratumoral and peritumoral microvasculature are correlated to booming of the tumoral growth fraction. In addition, the vascular network serves as a migration path for the intravascular and perivascular neoplastic spread. Hence, the quantification of the microvasculature might help establishing a prognostic factor of evolution. Among the available methods, spectral analysis of immunohistochemical sections highlighting vessels helps defining the microvasculature distribution. The benefit of using spectral analysis is discussed and the modalities of application of this analytical method are scrutinized. [less ▲]

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See detailL'image du mois. Calcinose idiopathique du scrotum.
Paquet, Philippe ULg; Devillers, C.; Szepetiuk, Grégory ULg et al

in Revue Médicale de Liège (2010), 65(3), 113-4

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See detailCutaneous papules in a patient with AIDS.
Quatresooz, Pascale ULg; Franchimont, Claudine ULg; Paquet, Philippe ULg et al

in Dermatology Reports (2010), 2(e2), 4-5

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See detailImagerie de la microcirculation cutanée défaillante.
QUATRESOOZ, Pascale ULg; REGINSTER, Marie-Annick ULg; FRANCHIMONT, Claudine ULg et al

in Dermatologie Actualité (2010), 123

Le réseau microvasculaire de la peau joue des rôles physiologiques majeurs en oxygénant les tissus et en permettant des échanges thermiques finement régulés. Son parcours résistif et capacitif module les ... [more ▼]

Le réseau microvasculaire de la peau joue des rôles physiologiques majeurs en oxygénant les tissus et en permettant des échanges thermiques finement régulés. Son parcours résistif et capacitif module les résistances périphériques au débit sanguin. La microvascularisation est sous l’influence de divers facteurs, mais globalement, elle semble presque immuable dans la peau saine. En revanche, certaines circonstances pathologiques engendrent des hyperplasies ou des hypoplasies vasculaires. Parfois aussi, le réseau semble garder son extension normale, mais sa structure intime est remaniée. Cette revue est un florilège d’aspects microscopiques associés à des perturbations majeures de la fonctionnalité vasculaire cutanée. [less ▲]

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See detailHow to manage hair changes in cancer patients
PIERARD-FRANCHIMONT, Claudine ULg; QUATRESOOZ, Pascale ULg; RORIVE, Andrée ULg et al

in Handbook of skin care in cancer patients (2010)

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See detailCyanoacrylate skin surface strippings
PIERARD-FRANCHIMONT, Claudine ULg; ARRESE ESTRADA, Jorge ULg; QUATRESOOZ, Pascale ULg et al

in Textbook of aging skin (2010)

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See detailSebum production
PIERARD-FRANCHIMONT, Claudine ULg; QUATRESOOZ, Pascale ULg; PIERARD, Gérald ULg

in Textbook of aging skin (2010)

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See detailFacial skin rheology
PIERARD, Gérald ULg; HENRY, Frédérique ULg; QUATRESOOZ, Pascale ULg

in Textbook of aging skin (2010)

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See detailPhysiopathological variations during aging
PIERARD, Gérald ULg; PAQUET, Philippe ULg; xhauflaire-uhoda, E. et al

in Textbook of aging skin (2010)

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See detailLa keratose actinique au diapason de la photocarcinogenese en champs. Un concept revisite.
QUATRESOOZ, Pascale ULg; PAQUET, Philippe ULg; PIERARD, Gérald ULg

in Revue Médicale de Liège (2010), 65(11), 619-22

Actinic keratosis should no more be considered as a single neoplasm calling for an individual treatment. The concept of actinic photocarcinogenesis presently turns upside down the perception of skin ... [more ▼]

Actinic keratosis should no more be considered as a single neoplasm calling for an individual treatment. The concept of actinic photocarcinogenesis presently turns upside down the perception of skin cancers induced by nonionizing electromagnetic radiations. Currently, the clinician should cope with the whole skin area that has been damaged by chronic exposures to the visible and the invisible spectrum of the light. The therapeutic archetypes are 5-fluorouracile 5% and imiquimod 5% carefully applied to the skin area. [less ▲]

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See detailComment j'explore...la peau par le photodiagnostic utilisant la fluorescence cutanee et son imagerie fonctionnelle.
Szepetiuk, G.; PIERARD-FRANCHIMONT, Claudine ULg; QUATRESOOZ, Pascale ULg et al

in Revue Médicale de Liège (2010), 65(9), 521-6

Under specific light illumination, skin produces peculiar fluorescent aspects. Such property can be used to provide diagnostic arguments or to disclose some peculiar functions of the skin. Some ... [more ▼]

Under specific light illumination, skin produces peculiar fluorescent aspects. Such property can be used to provide diagnostic arguments or to disclose some peculiar functions of the skin. Some superficial infections (erythrasma, tinea versicolor, dermatophytic tinea,..) reveal fluorescence that may be intense. The pilosebaceous follicles enriched in Propionibacterium spp show fluorescence. Such property is lost during some anti-acne treatments. A quenching effect is observed after application of sunscreens. The (pre)neoplastic areas prepared for dynamic phototherapy become fluorescent. Pyranine labeling of the stratum corneum exhibits fluorescence allowing the assessment of the renewal activity of the epidermis. [less ▲]

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See detailLes ulceres de jambe. Le dogme "noir, jaune, rouge" mis a mal.
HENRY, Frédérique ULg; QUATRESOOZ, Pascale ULg; PIERARD-FRANCHIMONT, Claudine ULg et al

in Revue Médicale de Liège (2010), 65(9), 502-5

The medical history of a leg ulcer is spangled with episodes contributing to its chronicity before leading to possible healing. The complexity of the involved biological factors is undisputable. In order ... [more ▼]

The medical history of a leg ulcer is spangled with episodes contributing to its chronicity before leading to possible healing. The complexity of the involved biological factors is undisputable. In order to simplify the management of these lesions, some doctors and nurses summarize the evolution of a leg ulcer in 3 phases according to the colour of the wound bed: black, yellow and red. The latter stage is commonly considered as a favourable condition for skin healing. We criticize such a concept by showing the anatomo-functional heterogeneity of the red wound bed. [less ▲]

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