References of "Pierard, Claudine"
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See detailEmerging therapies for ionizing radiation-associated skin field carcinogenesis.
Pierard, Gérald ULg; Pierard, Claudine ULg; Paquet, Philippe ULg et al

in Expert Opinion on Pharmacotherapy (2009), 10(5), 813-21

BACKGROUND: Radiodermatitis in its acute and chronic presentations represents a set of specific adverse effects resulting from ionizing radiations. Skin-field cancerization is another condition associated ... [more ▼]

BACKGROUND: Radiodermatitis in its acute and chronic presentations represents a set of specific adverse effects resulting from ionizing radiations. Skin-field cancerization is another condition associated to or independent of clinically recognizable radiodermatitis. This condition leads to the risk of later occurrence of skin malignancies. METHOD: Review of the current and most pertinent peer-reviewed publications with the addition of personal perspectives. RESULT/CONCLUSION: The presence of field cancerization encompasses subclinical changes, precursors of malignant alterations, as well as single or multiple primary neoplasms and local neoplastic recurrences. These tumours commonly require repeated treatments over time and cause significant morbidity. In general, specific tumour-directed treatments using ablative or destructive techniques require regular follow-up and screening for disclosing any further neoplasm. Another strategy corresponding to field-directed treatment targets a larger area of irradiated skin to reduce the risk of developing second neoplasms and local recurrences. Imiquimod is an immune response modifier of the imidazoquinoline class. It is the archetype drug used to control skin-field carcinogenesis. Cryotherapy, topical 5-fluorouracil, diclofenac and conventional photodynamic therapy are supposed to bring effects differing by their indications, healing rates and remission rates. The possibility of inducting a radiation recall dermatitis by some of these therapeutic modalities has not been thoroughly evaluated, and at present cannot be ruled out with confidence. [less ▲]

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See detailComment j'explore ... une rarefaction des sourcils.
Devillers, Céline ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2009), 64(1), 49-51

The rarefaction or loss of eyebrow hair may represent an esthetic complaint or a peculiar finding associated with a given disease. The causal disorders correspond to a few dermatitides and several ... [more ▼]

The rarefaction or loss of eyebrow hair may represent an esthetic complaint or a peculiar finding associated with a given disease. The causal disorders correspond to a few dermatitides and several endocrine, auto-immune, infectious, neoplastic, traumatic, iatrogenic and genetic disorders. [less ▲]

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See detailLe fond de l'air est frais, le froid est piquant et la peau en pâtit.
Quatresooz, Pascale ULg; Pierard, Claudine ULg; Paquet, Philippe ULg et al

in Revue Médicale de Liège (2008), 63(1), 18-22

Contrasting with many animals, the human physiological capacity to resist to cold is quite limited. Severe cold exerts its major physiopathological effects on the skin and the whole body. The skin and ... [more ▼]

Contrasting with many animals, the human physiological capacity to resist to cold is quite limited. Severe cold exerts its major physiopathological effects on the skin and the whole body. The skin and body thermoregulations become quite rapidly unsatisfactory. Cold is then responsible for a series of dermatoses which could, however, be often prevented by simple means. The severity and the duration of exposure to cold, combined to wind speed, altitude and environmental hygrometry condition the nature and severity of the potential disorders. Some lesions may remain moderate in severity, self-limited and transitory. Others lead to irreversible damage with necrosis of the skin and the deeper tissues. Death secondary to hypothermia is the risk of performing some outdoor activities in inhospitable and extreme cold conditions. [less ▲]

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See detailComment je traite... Une acné par isotretinoine.
Pierard, Claudine ULg; Nikkels, Arjen ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2008), 63(3), 115-8

Acne benefits from a series of treatments. The introduction of isotretinoin was a therapeutic breakthrough which considerably improved both the evolution and the prognosis of the disease. Indications of ... [more ▼]

Acne benefits from a series of treatments. The introduction of isotretinoin was a therapeutic breakthrough which considerably improved both the evolution and the prognosis of the disease. Indications of this retinoid kept changing over the past twenty years. New clinical conditions emerged including the management of disease recurrences. The daily dosages must be selected according to the type of acne, the gender of the patient and the pharmaco-economical implications. Teratogenicity must never be neglected as it represents the dreadful adverse event of the drug. A European Directive currently marks out the way to use this retinoid. [less ▲]

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See detailLe melanome cutane: innovations conceptuelles et therapeutiques, fruit de la recherche translationnelle.
Pierard, Gérald ULg; Quatresooz, Pascale ULg; Rorive, Andrée ULg et al

in Revue Médicale de Liège (2008), 63(10), 579-84

The scientific information about melanoma is on the rise. It has a direct impact on the diagnostic acuteness and on the therapeutic management. The most recent aspects of the utmost importance are ... [more ▼]

The scientific information about melanoma is on the rise. It has a direct impact on the diagnostic acuteness and on the therapeutic management. The most recent aspects of the utmost importance are presented. The concept of the duality between fast-growing (high malignancy) and slow-growing (reduced malignancy) melanoma is stressed. A new international multicentric approach using adjuvant therapy for stage III melanomas involves the clinical oncology department of the CHU of Liege. It concerns a targeted immunotherapy directed to the Mage A3 protein. [less ▲]

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See detailComment j'explore... une metastase cutanee. Qui es-tu, d'ou viens-tu?
Quatresooz, Pascale ULg; Pierard, Claudine ULg; Rorive, Andrée ULg et al

in Revue Médicale de Liège (2008), 63(9), 559-63

Cutaneous metastases may accompany up to 3 to 10% of all malignancies. They are usually identified after diagnosing the primary neoplasm. However, their disclosure can be synchronous, or the metastasis ... [more ▼]

Cutaneous metastases may accompany up to 3 to 10% of all malignancies. They are usually identified after diagnosing the primary neoplasm. However, their disclosure can be synchronous, or the metastasis may be the initial finding qualified as "precocious". The identification of the primary neoplasm sometimes proves to be difficult. Gender of the patient, the aspect and distribution of the metastases, as well as the histological and immunohistological examinations help establishing the diagnosis. The prognosis of the metastatic disease is often poor. [less ▲]

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See detailLe cas clinique du mois. Pemphigoide bulleuse apres brulure thermique.
Blaise, G.; Pierard, Claudine ULg; Quatresooz, Pascale ULg et al

in Revue Médicale de Liège (2008), 63(4), 182-3

In rare instances, some injuring physical factors such as thermal burns can be at the origin of bullous pemphigoid lesions. The early lesions are most often restricted to the injured skin area. Secondary ... [more ▼]

In rare instances, some injuring physical factors such as thermal burns can be at the origin of bullous pemphigoid lesions. The early lesions are most often restricted to the injured skin area. Secondary generalization is the natural evolution to be expected. However, once the episode is resolved, recurrence is exceptional. When the natural history of bullous pemphigoid differs from the regular type, the peculiar condition of development of these lesions does not change any of the diagnostic clinical and histological criteria, as well as the therapeutic procedures to follow. [less ▲]

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See detailLa peau et ses principales neurocristopathies.
Quatresooz, Pascale ULg; Vandenbossche, Géraldine ULg; Pierard, Claudine ULg et al

in Revue Médicale de Liège (2008), 63(5-6), 354-8

The neurocristopathies encompass genetic disorders targeting some structures originating from the neural crest development. Hence, skin is affected by some clinical manifestations of these disorders. This ... [more ▼]

The neurocristopathies encompass genetic disorders targeting some structures originating from the neural crest development. Hence, skin is affected by some clinical manifestations of these disorders. This review covers the main aspects found in neurofibromatosis, tuberous sclerosis, incontinentia pigmenti, neurocutaneous melanoblastosis, basal cell naevomatosis and the epidermal naevus syndrome. [less ▲]

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See detailComment j'explore... un lymphome T cutane. Nouveaux horizons.
Quatresooz, Pascale ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2008), 63(4), 208-12

Although cutaneous T cell lymphomas remain rare, their incidence seems progressively on the rise. The main diagnostic criteria are issued from the clinico-pathological confrontation. Other methods help ... [more ▼]

Although cutaneous T cell lymphomas remain rare, their incidence seems progressively on the rise. The main diagnostic criteria are issued from the clinico-pathological confrontation. Other methods help support the diagnosis and establish a prognosis. [less ▲]

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See detailL'image du mois. Tinea incognito.
Vandenbossche, Géraldine ULg; Legrain, A.; Pierard, Claudine ULg et al

in Revue Médicale de Liège (2008), 63(7-8), 463-4

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See detailComment j'explore...Un patient avec un erytheme palmaire.
Vandenbossche, Géraldine ULg; Pierard, Claudine ULg; Quatresooz, Pascale ULg et al

in Revue Médicale de Liège (2008), 63(2), 101-4

Palmar erythema occurs in a series of physiological and pathological conditions. The first group encompasses hereditary and idiopathic conditions, as well as the time of pregnancy and ageing. The ... [more ▼]

Palmar erythema occurs in a series of physiological and pathological conditions. The first group encompasses hereditary and idiopathic conditions, as well as the time of pregnancy and ageing. The pathological states include some dermatoses as well as hepatic, autoimmune, infectious and paraneoplastic conditions. Medications may also be responsible for palmar erythema, in particular some chemotherapy agents. [less ▲]

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See detailL'agonie du taratata auprès du clinicien.
Xhauflaire-Uhoda, Emmanuelle; Quatresooz, Pascale ULg; Pierard, Claudine ULg et al

in Revue Médicale de Liège (2008), 63

Le clinicien est à la croisée des chemins entre la rigueur scientifique et le taratata d’une certaine communication bien moins sérieuse. Dans ce contexte, la recherche de l’objectivité est primordiale ... [more ▼]

Le clinicien est à la croisée des chemins entre la rigueur scientifique et le taratata d’une certaine communication bien moins sérieuse. Dans ce contexte, la recherche de l’objectivité est primordiale dans les études cliniques. Nous résumons les aspects principaux des méthodes de dénombrement, de classement, de mesures paramétriques et d’évaluations sur échelles structurée ou non structurée. [less ▲]

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See detailEffects of various concentrations of glycolic acid at the corneoxenometry and collaxenometry bioassays.
Xhauflaire, Emmanuelle ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Journal of Cosmetic Dermatology (2008), 7(3), 194-8

BACKGROUND: Glycolic acid is an alpha-hydroxy acid used as a chemical peeling for more than a quarter century. The primary tissue target is the stratum corneum. OBJECTIVE: This study aims to assess the ... [more ▼]

BACKGROUND: Glycolic acid is an alpha-hydroxy acid used as a chemical peeling for more than a quarter century. The primary tissue target is the stratum corneum. OBJECTIVE: This study aims to assess the effects of various concentrations of glycolic acid on the stratum corneum and collagen fibers using two selected bioassays. METHODS: Corneoxenometry was performed to test the effects on human stratum corneum. Collaxenometry was similarly designed to quantify the effect on sheets of collagen fibers. Different glycolic acid concentrations ranging from 5% to 70% in alcohol were tested, respectively, for 3- and 10-min exposure times. RESULTS: Both bioassays showed consistent reactivities with a dose-effect relationship when using a 3-min exposure time. By contrast, the tests appeared unreliable or uninformative for the 10-min exposure time. CONCLUSION: Corneoxenometry and collaxenometry appear useful for in vitro testing peeling agents during short exposure times. [less ▲]

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See detailClinicopathologic presentations of dermatomycoses in cancer patients.
Quatresooz, Pascale ULg; Pierard, Claudine ULg; Arrese Estrada, Jorge ULg et al

in Journal of the European Academy of Dermatology & Venereology (2008)

Many of the skin fungal infections in cancer patients may look similar to those infections in non-cancer patients. However, in some cases, they become more extensive and even life threatening. Prolonged ... [more ▼]

Many of the skin fungal infections in cancer patients may look similar to those infections in non-cancer patients. However, in some cases, they become more extensive and even life threatening. Prolonged and severe neutropenia is the main risk factor for the dramatic issue of fungal infections. The dermatomycoses in cancer patients can be classified in four broad groups: primary superficial dermatophytoses, primary superficial yeast infections, opportunistic mold infections with distinct potential for dissemination and secondary cutaneous manifestations of fungaemia. Occasionally, more than one fungus are found inside a given skin lesion. A special condition is represented by the mycotic colonization of mucosal squamous cell carcinomas. Angio-invasion by fungi accounts for the frequency of disseminated infections prevailing in immunocompromised cancer patients. In case of skin involvement, the dermatologist may assist by recognizing subtle semiological signs and performing biopsies for swift histological examination, molecular biology and/or culture. [less ▲]

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See detailHighlighting the immunohistochemical profile of melanocytomas: review.
Quatresooz, Pascale ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Oncology Reports (2008), 19(6), 1367-72

The histological assessment of atypical melanocytic neoplasms is mandatory to ensure proper diagnosis and treatment. However, for some atypical lesions, expert pathologists report only moderate ... [more ▼]

The histological assessment of atypical melanocytic neoplasms is mandatory to ensure proper diagnosis and treatment. However, for some atypical lesions, expert pathologists report only moderate concordance in the diagnosis. In addition, certain atypical neoplasms have been coined differently in the literature. These designations include among others atypical and metastasizing Spitz tumor, malignant Spitz naevus, borderline and intermediate melanocytic tumor, and melanocytic tumor of uncertain malignant potential (MELTUMP) or Spitzoid melanocytic tumor of uncertain malignant potential (STUMP). These neoplasms are grouped here under the heading melanocytoma. Such melanocytic lesions have a benign outcome but exhibit an atypical and worrisome aspect. Rare individual cases of melanocytomas can progress to locoregional disease (agminate melanocytomas), and even beyond. At times, the distinction between melanocytoma and melanoma is difficult and may even be impossible. However, multipronged immunohistochemistry can help define malignancy risk stratification and therapeutic guidelines. [less ▲]

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See detailSpace-time clustering and seasonality in diagnosing skin cancers in Wallonia (south-east Belgium).
Quatresooz, Pascale ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Dermatology : International Journal for Clinical & Investigative Dermatology (2008), 217(1), 48-51

BACKGROUND: In Westernized populations, the number of diagnosed cases of primary cutaneous cancers, particularly malignant melanomas and basal cell carcinomas (BCC), has been previously shown to fluctuate ... [more ▼]

BACKGROUND: In Westernized populations, the number of diagnosed cases of primary cutaneous cancers, particularly malignant melanomas and basal cell carcinomas (BCC), has been previously shown to fluctuate during specific periods of the year. OBJECTIVE AND METHOD: The aim of the present 6-year study was to explore the seasonality if any in skin cancer detection in Wallonia (south-east Belgium). RESULTS: For both malignant melanomas and BCC late spring/early summer and mid-autumn were the periods of highest diagnosis prevalence irrespective of gender. The amplitude of this bimodal evolution remained within the range of 2 standard deviations around the monthly means. Similar seasonal variations were also found in non-neoplastic controls consisting of laboratory samplings of onychomycoses and non-infectious onychodystrophies. CONCLUSION: There is reason to believe that this timing and rhythm is unrelated to any specific cancer chronomics. Rather, the present findings suggest unspecific seasonality in diagnosing skin disorders including malignancies. A variable patient awareness of changing aspects of the skin according to seasons probably represents the major influence of the described space-time clustering of skin cancer diagnosis. [less ▲]

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See detailSkin fungal biocontamination and the skin hydrogel pad test.
Paquet, Philippe ULg; Pierard, Claudine ULg; Pierard, Gérald ULg et al

in Archives of Dermatological Research (2008), 300(4), 167-71

Previous observations have revealed that environmental nondermatophyte molds (NDM) can grow inside specific hydrogel pads (LaserAid). Some of these NDM might be responsible for superficial and invasive ... [more ▼]

Previous observations have revealed that environmental nondermatophyte molds (NDM) can grow inside specific hydrogel pads (LaserAid). Some of these NDM might be responsible for superficial and invasive mycoses as well as for allergic respiratory and cutaneous disorders. The load of NDM propagules in the environment is considered to be an important risk factor for all these diseases. It is postulated that the quantification of the responsible fungi deposited at the skin surface may be an indicator of a recent exposure to environmental fungi. The aim of the present study was to assess using the LaserAid hydrogel pads, the density of living NDM adhering to the skin surface of healthy subjects. Sterile hydrogel pads were applied in a repeat procedure onto the normal-looking skin of the palms and face of 35 healthcare workers who were active in low exposure areas. Similar samplings were performed after washing the skin with a regular skin cleanser, or after applying an alcohol solution or a povidone iodine solution. As controls, 20 sterile pads were exposed for a few minutes to ambient air of the laboratory without any contact with the skin. Each of these samples was stored for 2 weeks at room temperature in a clean protected environment. After that period, visual inspection of the pads was followed by microscopic examination of PAS-stained 6 microm-thick sections. In addition, mycological cultures were performed from pieces of the pads deposited onto Sabouraud agar plates. While 19/20 air-exposed samples were not contaminated by environmental air-borne fungi, 61/70 of the initial skin samplings and 6/70 of the repeat skin samplings showed foci of fungal colonization confirmed by microscopic examination. No specific differences were disclosed between the face and palm samplings. Cultures revealed the presence of NDM in the majority (64/67) of the colonized pads, and a few Candida albicans contaminations (3/67) were also disclosed. The cleansing with a non-antimicrobial product as well as disinfecting procedures performed before sampling markedly decreased the mycoflora without, however, clearing the skin of NDM and yeasts. In conclusion, the hydrogel pad procedure brings information about potential environmental skin contamination by NDM and commensal yeasts. The regular cleansing and disinfecting procedures do not eradicate these fungi from the skin surface. [less ▲]

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See detailCrossroads between actinic keratosis and squamous cell carcinoma, and novel pharmacological issues.
Quatresooz, Pascale ULg; Pierard, Claudine ULg; Paquet, Philippe ULg et al

in European Journal of Dermatology (2008), 18(1), 6-10

Actinic keratoses (AKs) and their derived squamous cell carcinomas are distinctive lesions forming a continuum in a multi-step carcinogenesis process. They are typically found on chronically sun exposed ... [more ▼]

Actinic keratoses (AKs) and their derived squamous cell carcinomas are distinctive lesions forming a continuum in a multi-step carcinogenesis process. They are typically found on chronically sun exposed skin. AKs merit to be recognized as such and to be distinguished from squamous cell carcinomas both conceptually and for therapeutic implications. The histological differences between these lesions are well defined and should not be blurred. A brief review is presented about the biological features responsible for AKs and the clinicopathologically distinctive aspects of these lesions. In addition, recent findings are presented about pharmacotherapy using anti-epidermal growth factor receptors, imidazoquinolines, diclofenac-hyaluronan, and methyl aminolevulinate photodynamic therapy. [less ▲]

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See detailPeaufiner la dermatopathologie fonctionnelle, la dermometrologie et la mecanobiologie.
Pierard, Gérald ULg; Pierard, Claudine ULg; Hermanns-Lê, Trinh ULg et al

in Revue Médicale de Liège (2007), 62 Spec No

Dermatopathology is a tool using the microscopic examination for diagnosing cutaneous diseases. The frontiers of its field of interest were extended by exploring the physiopathology of skin functional ... [more ▼]

Dermatopathology is a tool using the microscopic examination for diagnosing cutaneous diseases. The frontiers of its field of interest were extended by exploring the physiopathology of skin functional properties. An example is provided by the evaluation of alterations of skin suppleness in various connective tissue disorders. This approach takes profit from both conventional histology and histochemistry. Immunohistology targeting dermal dendrocytes reveals their various shapes reflecting the modifications in tensegrity under the control of mechanobiology. The latter property is an indicator of the evolution and severity of the connective tissue changes. Electron microscopy is also very instructive in this field. The in vivo examination by dermoscopy highlights a similar mechanism involving the melanocytes. From an engineering point of view, the skin and subcutaneous tissue represent an integrated load-transmitting structure. It is subjected to intrinsic and environmental influences. Some models were offered to explain how skin withstands and transmits loads through deforming appropriately or abnormally according to disorders of the connective tissue structure. We report a brief review of the principles of interpretation of the measurements of the skin biomechanical properties, and the histological presentations of mechanobiology. The applications of such investigations are summarized in the Ehlers-Danlos syndrome, inguinal hernias, gravitational syndrome, diabetes, scleroderma, hemodialysed patients, in case of growth hormone administration and during climacteric. [less ▲]

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See detailAcne iatrogene paroxystique et les inhibiteurs du recepteur du facteur de croissance epidermique (EGFR).
Pierard, Claudine ULg; Blaise, G.; Paquet, Philippe ULg et al

in Revue Médicale de Liège (2007), 62(1), 11-4

Paroxysmal drug-induced acne is a peculiar condition recognized for decades in dermatology. It can be induced by a variety of drugs. In recent years, the epidermal growth factor receptor inhibitors used ... [more ▼]

Paroxysmal drug-induced acne is a peculiar condition recognized for decades in dermatology. It can be induced by a variety of drugs. In recent years, the epidermal growth factor receptor inhibitors used in oncology have shown this type of adverse effects. The pathogenic mechanism is likely related to the EGF implication in the rupture of the microcomedo wall resulting in the perifollicular inflammatory reaction typical for acne. Other cutaneous adverse effects have been reported with anti-EGFR drugs including paronychia and xerosis. The dermatological treatments of these drug-induced disorders must be adequately targeted. [less ▲]

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