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C Antoniou

Publications and source records attributed to C Antoniou.

At least 19 recordsLinked to original sources
PubMed2002

Evaluation of the role of contact sensitization and photosensitivity in the pathogenesis of poikiloderma of Civatte.

BACKGROUND: Poikiloderma of the face and neck (Civatte) is a rather common, indolent, chronic dermatosis, most often affecting menopausal females. Cumulative excessive sun exposure, a phototoxic or a photoallergic reaction, hormonal changes of menopause and genetic factors have all been incriminated in its obscure aetiopathogenesis. OBJECTIVE: To evaluate the role of contact sensitization and photosensitivity in the pathogenesis of poikiloderma of Civatte (PC). METHODS: Thirty-two patients (24 females and eight males, age range 38-74 years) with PC were patch tested with the European standard series and the fragrance series, and were photopatch tested with the photoallergens series. Additionally, photo-testing with a monochromator was performed. RESULTS: Thirteen of 32 patients (40.62%) had one or more positive reactions to allergens of the standard series. Eight patients (25%) had positive reactions to fragrance mix and/or Balsam of Peru, which are included in the standard series, or to allergens of the fragrance series. Nickel sulphate was the single most common cause of contact sensitization (18.75%) among our patients. Ninety-seven subjects, who were patch tested with the standard series for suspected allergic contact dermatitis of the face and/or neck, served as age, sex and site controls. Of these, nine (9.27%) had one or more positive reactions to fragrance compounds. Statistical analysis showed a statistically significant difference in the frequency of positive reactions to fragrances between the PC group and the control group (chi2 value = 3.91, P < 0.05). In contrast, none of the PC patients had a positive photopatch test for the allergens included in the photoallergens series. The estimated minimal erythemal dose for the PC group was in all cases within normal limits for all wavelengths of ultraviolet (UV) radiation examined. CONCLUSIONS: Contact sensitization, mostly to perfume ingredients, may develop in PC, possibly playing a pathogenetic part, at least in a subset of patients. Despite negative results of photopatch testing, an allergic photo-contact reaction cannot be definitely excluded. PC seems not to be a photosensitivity disorder of the type of chronic actinic dermatitis. UV radiation-induced dermal connective tissue changes are the predominant histological feature of PC, leading to telangiectasia due to loss of vascular support. Reticular pigmentation may result from a delayed hypersensitivity reaction to perfume and/or cosmetic ingredients. Patch testing with the standard series and avoidance of documented allergens may be of value in patients with PC.

Adult↗
PubMed2002

Polymorphous light eruption.

Polymorphous light eruption (PLE) is a common idiopathic photosensitivity disorder with an estimated prevalence of 10-20%. It is characterized by an intermittent skin reaction to ultraviolet (UV) radiation exposure, consisting of non-scarring pruritic erythematous papules, vesicles or plaques that develop on light-exposed skin. Despite the different morphology in different individuals, the eruption tends to have a monomorphous presentation in any single subject. The histopathological features of PLE are distinct and comprise a perivascular lymphocytic infiltrate in the dermis, subepidermal oedema and variable epidermal changes. The pathogenesis of PLE is not well known, but findings suggest that it is a delayed-type hypersensitivity reaction to one or more UV-modified cutaneous antigens. The principal action of PLE is mainly in the UVA region, although some subjects exhibit sensitivity to UVB alone or to both UVA and UVB radiation at the same time. Preventive measures in PLE include the regular use of photoprotective methods combined with graduated exposures to natural sunlight. The induction of immune tolerance by phototherapy and photochemotherapy are useful prophylactic methods in moderate to severe cases. The role of systemic agents in the management of PLE is under investigation. This article reviews the epidemiological, pathogenetic and clinical aspects of PLE and discusses recent advances in the diagnostic approach and management of this condition.

Diagnosis, Differential↗
PubMed1999

Familial cases of poikiloderma of Civatte: genetic implications in its pathogenesis?

Poikiloderma of Civatte (PC) is a rather common, benign skin condition of obscure etiopathogenesis: cumulative exposure to UV radiation, hormonal changes associated with the menopause, and photo-allergic mechanisms have been implicated. We present seven cases of PC among the members of two unrelated Greek families, who have not shared common extrinsic influences. Literature review revealed no other reported familial cases. Familial tendencies, as well as the not unusual occurrence of PC in individuals with minimal sun exposure, and who are not using perfumes or cosmetics, provide support for the hypothesis that a genetic predisposition to the disease may exist; this predisposition is possibly transmitted as an autosomal dominant trait.

Female↗
PubMed1993

Itraconazole in the treatment of tinea corporis and tinea cruris.

Forty-five patients with tinea corporis or tinea cruris were treated with oral itraconazole 100 mg daily for 15 days. At the end of the 15-day treatment, 80% of the patients were healed or had markedly improved. At the first follow-up visit, 2 weeks after stopping therapy, 80% of patients were considered responders. An additional follow-up visit another month later (i.e. 6 weeks post-treatment) showed that 32 of 41 patients had responded (78%). Overall, the mycological cure rate (culture and microscopy negative) was somewhat lower than the clinical response rate. Only three patients reported minor side effects (7%). Nausea was reported by two patients and an urticarial reaction was seen in one patient after 8 days treatment. This latter patient discontinued therapy because of the adverse experience. It is concluded that itraconazole, given at a daily dose of 100 mg for 15 days, is effective in the treatment of tinea corporis and tinea cruris. Response rates at the last visit (6 weeks post-therapy) remained at the same satisfactory levels as at the first follow-up visit (2 weeks post-therapy), even though treatment was stopped after 2 weeks. Itraconazole appears to be well tolerated by patients. These results, both in terms of efficacy and side effects, are in line with results reported by other investigators. The fact that the mycological cure rates were somewhat lower than the clinical response rates had apparently no influence on the relapse rate at 6 weeks follow-up post-therapy.

Administration, Oral↗
PubMed1992

Guidelines for the treatment of vitiligo.

At present, there is no universally effective drug for vitiligo therapy; there are, however, various therapeutic modalities that may be beneficial. Therapeutic regimens used to treat vitiligo include psoralens and ultraviolet A light (PUVA), topical corticosteroids, fluorouracil locally applied with skin abrasion, a variety of surgical techniques to transplant autologous melanocytes from pigmented skin to nonpigmenting areas, a new photochemotherapeutic regimen using oral khellin with UVA phototherapy, and a recently proposed treatment with oral phenylalanine in combination with UVA exposure. PUVA and topical corticosteroids are the 2 most frequently used modalities. The use of effective sunscreens with a high sun protection factor (SPF) is of help in preventing the vitiliginous areas from burning and normal skin from becoming tanned. Cosmetic camouflage is also useful to disguise the white areas of skin. Finally, depigmentation should be considered in patients with greater than 50% cutaneous involvement who fail to respond or are unwilling to undergo treatment. The selection of patients for therapy should take into consideration the patient's motivation, the psychological impact of the disease and the clinical presentation of vitiligo, and should weigh the risks and benefits of prolonged therapy.

Humans↗
PubMed1989

A double-blind trial of treatment of seborrhoeic dermatitis with 2% ketoconazole cream compared with 1% hydrocortisone cream.

Fifty patients with seborrhoeic dermatitis were treated with 2% ketoconazole cream (n = 24) or with 1% hydrocortisone cream (n = 26) for 4 weeks in a double-blind comparative study. These twice daily applications resulted in 87.2% symptomatic improvement for hydrocortisone vs. 81.6% for ketoconazole. The number of P. ovale yeasts was significantly reduced after the application of ketoconazole compared with hydrocortisone. The incidence of side-effects was low in both groups.

Administration, Topical↗
PubMed1989

Vitiligo therapy with oral and topical phenylalanine with UVA exposure.

The administration of phenylalanine (Phe) combined with UVA exposure was found to be effective in treating vitiligo. Twenty-one patients with vitiligo were divided in two groups: eleven patients were treated with oral L-Phe in a dose of 100 mg/kg body weight and with UVA exposure and ten patients were treated with oral L-Phe in a dose of 100 mg/kg body weight and with UVA exposure. In addition, in the second group, a cream containing 10% L-Phe was applied to the vitiliginous areas. The best results occurred in the second group. No side effects were found in either group.

Administration, Oral↗
PubMed1988

Ketoconazole 2% cream versus hydrocortisone 1% cream in the treatment of seborrheic dermatitis. A double-blind comparative study.

Seventy-two patients with seborrheic dermatitis were treated once daily with 2% ketoconazole cream (n = 36) or 1% hydrocortisone cream (n = 36) on a double-blind basis for 4 weeks. For the global evaluation, no significant difference could be seen between the two groups. The clinical response was 80.5% in the ketoconazole group and 94.4% in the hydrocortisone group. For the different symptoms combined (scaling, redness, itching, and papules), no significant difference was seen between the two groups when the total scores at week 2 and at week 4 were compared with the initial scores. The incidence of side effects in both groups was comparably low.

Administration, Cutaneous↗
PubMed1976

The effect of respiratory motion on the echocardiogram.

The effects of respiratory movements on the ultrasonic echoes of the cardiac structures were recorded and analyzed in 50 consecutive patients. Deep inspiration in cooperative patients resulted in a considerable increase of dense anterior echoes, with blotting out of any distal or posterior echoes in 12 of 44 patients (group A). In the second or larger series (32 of 44 patients; group B), a posterior displacement of most of the identifiable intrinsic cardiac echoes was seen with deep inspiration, particularly those of the posterior wall of the left ventricle. Forced expiration produced an opposite or anterior displacement of the cardiac echoes. Normal respirations showed similar but smaller excursions.

Echocardiography↗
PubMed1975

Bigeminal ventricular tachycardia with Wenckebach exit block.

A patient is presented in whom repeated attacks of ventricular tachycardia occurred. His last and fatal attack revealed an alternation or coupling of the cycle lengths of the ventricular beats. A large left ventricular wall aneurysm was found, which probably accounted for the unusual arrhythmias.

Aged↗