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Biomedical subjects

A Lassus

Publications and source records attributed to A Lassus.

At least 55 records · Page 3Linked to original sources
PubMed1984

Treatment of alopecia areata with three different PUVA modalities.

Seventy-six patients with severe alopecia areata were treated with either local or oral 8-methoxypsoralen and UVA irradiations. In 43 cases (57%) a good-to-excellent result was obtained. The number of irradiations required for regrowth varied, but 20-40 treatments were sufficient in most cases with a positive response. Patients with circumscribed or ophiasic alopecia responded better than patients with total or universal alopecia. Non-atopic patients responded better than patients with atopy, while a family history of alopecia areata did not seem to have any significance on the outcome of the therapy. The age of onset of the disease seemed to be of importance, as well as the duration of the treated attack. Patients over 20 years old at the first attack showed a better response than patients with an earlier onset of the disease. During a follow-up period of 6-68 months, 22 of 43 successfully treated patients had a relapse.

Adult↗
PubMed1984

Treatment of vitiligo with oral methoxsalen and UVA.

139 patients with vitiligo of long duration were treated with oral 8-MOP and UVA. 22 patients had focal and 117 generalized vitiligo. 27 had vitiligo on the skin of their face and/or neck and 58 on their hands and/or feet. Vitiligo of the face and/or neck responded very well to the treatment, 14 of 27 (52%) repigmenting completely, while the treatment results of hands and/or feet were poor (complete repigmentation in 2 of 58 cases (3%). In cases with focal vitiligo total repigmentation was observed much more frequently (in 11 of 22 cases) than in cases with generalized vitiligo (in 23 of 117 cases). Acute toxic effects were frequent, erythema in 55 cases (40%), nausea in 46 cases (33%), pruritus in 16 cases (12%) and headache in 8 cases (6%). Long-term adverse effects such as hypertrichosis and actinic keratoses occurred in 3 cases each. 6 patients (4%) had elevated transminases at some stage of the treatment. This did not cause withdrawal from treatment in any of the cases.

Administration, Oral↗
PubMed1984

Re-PUVA.

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Dose-Response Relationship, Radiation↗
PubMed1983

New observations on the fine structure of lamellar ichthyosis and the effect of treatment with etretinate.

Light and electron microscopy were used to study specimens from four patients suffering from lamellar ichthyosis. Three of these patients had been treated with etretinate for 10 months. Biopsy specimens taken from the patients before treatment showed hyperkeratosis with focal parakeratosis, a thickened granular layer in which the cellular content of tonofibrils and keratohyalin was moderately diminished, and acanthosis with increased cellular activity. During treatment with etretinate there was moderate clinical improvement. The most conspicuous microscopic change was thinning of the cornified layer. The intercellular spaces of the epidermis showed increased amounts of fine and coarse granular substance. The number of keratinosomes was increased. Stimulation of Langerhans' cells was observed. Two new ultrastructural findings in lamellar ichthyosis were discovered. First, the marginal band of the cornified layer was absent in conventional glutaraldehyde-osmium tetroxide fixation. Second, the corneocytes contained electron-lucent crystals. The treatment with etretinate did not influence these structures. The mechanism of action of retinoids in lamellar ichthyosis is discussed.

Adult↗
PubMed1983

A double-blind comparison of sulconazole nitrate 1% cream with clotrimazole 1% cream in the treatment of dermatophytoses.

Forty patients with dermatophytosis were treated with either sulconazole 1% cream or clotrimazole 1% cream (twenty patients in each group) twice daily for 4 weeks. Overall clinical improvement with respect to baseline at weeks 2, 3 and 4 favoured sulconazole-treated patients (the differences were statistically significant). The weekly mean severity scores for the sulconazole-treated patients for erythema, scaling, fissuring and itching were consistently lower than those for the clotrimazole-treated patients and the differences were statistically significant for erythema and sealing. It was concluded that sulconazole nitrate 1% cream is very effective against various dermatophytoses.

Administration, Topical↗
PubMed1983

Ultrastructure of pityriasis rubra pilaris with observations during retinoid (etretinate) treatment.

The light and electron microscopic structure of pityriasis rubra pilaris (PRP) is described in five patients. Hyperkeratosis, hypergranulosis, keratotic plugs in the follicular openings, acanthosis and focal parakeratosis were observed. A moderate perivascular infiltrate was seen in the upper dermis. Electron microscopy revealed moderately activated keratinocytes, a decreased number of tonofilaments and desmosomes, enlarged intercellular spaces, parakeratosis with lipid-like vacuoles and a large number of keratinosomes. Lymphoid cells were present in the epidermis in moderate numbers. At the dermo-epidermal junction, the basal lamina was focally split, containing gaps. Etretinate therapy produced moderate to marked clinical improvement. The histological picture improved but the typical signs of PRP, including follicular plugging, persisted. Ultrastructurally the cellular activity and the amount of hyperkeratosis and parakeratosis decreased, while increases in keratinosomes, intercellular substance, microvilli and desmosomes were observed during treatment.

Adolescent↗
PubMed1983

Reproducibility of clinical trials of topical glucocorticosteroids.

Clinical trials of topical glucocorticosteroids employ a variety of evaluating methods. This makes it difficult to assess the relative strengths of the products without resorting to direct comparative trials between them. We propose a standardized evaluation system for this class of pharmaceuticals that can easily be adopted by any competent dermatologist. Its use would facilitate evaluation of new topical glucocorticosteroids.

Administration, Topical↗
PubMed1983

Efficacy of etretinate (Tigason) in clearing and prevention of relapse of palmoplantar pustulosis.

A total of 40 patients with palmoplantar pustulosis (PPP) were initially treated with oral etretinate (Tigason) in an open trail with a maximum treatment period of 16 weeks. Remission, with only slight residual changes in some cases, was achieved in 26 patients (65%) who were randomized to either a low dose of Tigason or placebo. In the Tigason group, 7 of 11 patients were still in remission afer 6 months while in the placebo group, remission persisted in 4 of the 10 patients who stayed in the study throughout the whole 6 months' period. Alopecia led to stopping the treatment in 6 patients and desquamation of the healthy skin in 2 patients. Other side-effects were only mild. As a conclusion, Tigason shows a beneficial effect in the majority of patients with PPP and is better than placebo in preventing relapse of the disease but intolerable side-effects restrict its use in many patients.

Adult↗
PubMed1983

Persistent ashen-gray maculae and freckles induced by long-term PUVA treatment.

Persistent ashen-gray maculae 5-7 mm in diameter and freckles developed after prolonged PUVA therapy of psoriasis. Histopathology of maculae showed extensive collections of melanophages in the upper dermis. The melanocytes were strongly stimulated at the site of the freckles. The number of melanosomes, mitochondria, endoplasmic reticulum and dendrites were increased. Pathological features such as large amounts of lipid droplets and lysosome-melanosome complexes were also found within the melanocytes.

Humans↗
PubMed1983

Clinical comparison of alclometasone dipropionate cream 0.05% with hydrocortisone butyrate cream 0.1% in the treatment of atopic dermatitis in children.

Alclometasone dipropionate cream 0.05% was compared to hydrocortisone butyrate cream 0.1% in the treatment of atopic dermatitis in forty children, 5 to 11 years old. In this double-blind, parallel-group trial, the experimental creams were applied twice daily for 2 weeks, without occlusion, to the study areas. Efficacy was evaluated 1 and 2 weeks after the start of treatment. Both creams were effective treatments for atopic dermatitis; however, alclometasone dipropionate was judged slightly more efficacious. Improvement in erythema, induration, and pruritus averaged 76% for alclometasone dipropionate-treated patients and 70% for hydrocortisone butyrate-treated patients. At the end of treatment, the physician's global evaluation indicated nineteen of twenty patients in the alclometasone dipropionate group had between 51% and 100% improvement in disease signs and symptoms, compared with sixteen of twenty patients treated with hydrocortisone butyrate. Two patients in the alclometasone dipropionate-treated group and one in the hydrocortisone butyrate-treated group reported mild stinging.

Child↗
PubMed1983

Systemic side-effects of three topical steroids in diseased skin.

Two clinical trials were carried out in order to study adrenal suppression in 6 patients with psoriatic erythroderma and in 28 patients with psoriasis treated with topical glucocorticosteroids. Betamethasone-17-valerate (0.1%), betamethasone-17,21-dipropionate (0.05%) and budesonide (0.025%) ointments were studied in erythroderma; betamethasone-17,21-dipropionate and budesonide in psoriasis. The erythroderma study was an open, crossover experiment; the psoriasis study was a double-blind, group-comparative study. Adrenal suppression was measured as plasma cortisol concentrations with and without ACTH stimulation. The depressive activity on the HPA-axis in increasing order was budesonide, betamethasone-17-valerate and betamethasone-17,21-dipropionate. The differences, however, did not reach statistically significant levels.

Administration, Topical↗
PubMed1983

[Vitiligo].

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Adult↗