PubMed Health⌕ Search

Biomedical subjects

R Betti

Publications and source records attributed to R Betti.

At least 19 recordsLinked to original sources
PubMed1992

Epidemiological, clinical and allergological observations on pompholyx.

We have studied a group of 104 patients with pompholyx, to investigate the relationship between allergological factors and its etiopathogenesis. The following examinations were performed: blood sampling (routine tests and IgE levels), allergological tests (patch, prick, intradermal, and oral provovation tests with nickel sulphate), skin biopsy to exclude pemphigus vulgaris or bullous pemphigoid. An accurate history of familial and personal allergic diathesis was enquired for and various possible aggravating factors (season, microclimate, perspiration and emotional stress) were considered. The results were age and sex-matched with a healthy control group (208 subjects). We found familial and personal atopic diathesis in 50% of patients versus 11.5% of controls (p less than 0.001); 39 patients (37.49%) also had high levels of IgE. Nickel sulphate was the allergen with the highest positivity on patch testing: 20.19% versus 6.25% of the control group (p less than 0.001). The % of patients allergic to nickel reached 26%, including those (6 patients) reacting to the oral provocation test. Season (43 patients) and hyperhidrosis (38) were the aggravating factors most commonly claimed. We detected no correlation between age, sex, grading of pompholyx and the allergological parameters investigated. Though several different allergological findings have previously been reported in dyshidrosis, their role in its pathogenesis has not yet been fully explained. We think that different haptens or antigens can produce the same clinical and histological picture of pompholyx in predisposed subjects.

Adolescent↗
PubMed1991

Effect of UVB plus tar therapy on serum levels of interleukin-2 receptors in patients with psoriasis.

Baseline serum levels of interleukin-2 receptor (IL2R) were measured in 65 patients with active psoriasis. IL2R levels in psoriatic patients were significantly higher than in healthy controls (582.4 +/- 289.23 u/ml vs. 369.64 +/- 111.10 u/ml; P less than 0.05), but did not differ statistically from values found in an atopic dermatitis control group (619.88 +/- 254.27 u/ml). Sex, age and severity of the disease do not affect levels of IL2R. The same IL2R levels were measured in 26 psoriatic patients receiving UVB plus tar therapy. This therapy, continued until clinical remission, lowered IL2R levels to values comparable to controls. This decrease may be due to an immunosuppressive effect of therapy.

Adult↗
PubMed1991

Skin ultrasound in dermatologic surgical planning.

High-resolution ultrasonography was performed on 55 patients with palpable skin lesions, all submitted to surgical excision and to histologic diagnosis. In all the cases, the ultrasound picture was confirmed by the surgical appearance of the lesions. The sonographic structure was characteristic in the case of cysts and angiomas, lymphangiomas in particular. Ultrasonography is considered a simple and reliable technique for the pre-operative evaluation of skin nodules, as it gives a clear picture of their size, depth, and outline. However, sonography cannot substitute for the clinical dermatologic approach and the need for an histologic diagnosis.

Adult↗
PubMed1990

Ultrasonography of nodular and infiltrative lesions of the skin and subcutaneous tissues.

Ultrasonography with high-frequency probes was performed on 80 dermatological patients carrying palpable lesions of the skin. The case list included hemo- and lymphangiomas (16 cases), cysts (13 cases), Kaposi sarcomas (9 cases), and panniculitis (20 cases). All lesions underwent open biopsy and histological examination. Ultrasound yielded technically adequate images in 74/80 cases (93%). Angiomas appeared as multiple transonic cavities separated by hyperechoic septa; cysts were usually echo free or weakly echogenic, with smooth outlines. Kaposi sarcomas corresponded to superficial hypoechoic nodules with blurred margins, while panniculitis appeared as a diffuse thickening of the subcutaneous space. When acute inflammation was present, as in most cases of erythema nodosum, a nonhomogeneous hypoechoic pattern was found.

Cysts↗
PubMed1990

Ultrasonography of proliferative vascular lesions of the skin.

High-resolution ultrasonography with small part probes was performed on 20 proliferative vascular lesions of the skin (3 lymphangiomas, 9 hemangiomas, 8 Kaposi sarcomas). All the lesions were submitted to histological examination. The histological cuts were made in the same planes as the ultrasound scans in order to obtain a direct comparison. The sonographic pattern of each histotype is characteristic and correlated with the corresponding histological picture. Lymphangiomas appear as large anechoic communicating cavities; hemangiomas have small hypoechoic areas separated by thin hyperechoic septa. Kaposi sarcomas possess a mixed sonographic structure with ill-defined margins. Ultrasound is proposed as a simple and harmless diagnostic aid to clinical examination of proliferative vascular lesions of the skin.

Adult↗
PubMed1990

Familial pityriasis rotunda.

Pityriasis rotunda is a rare dermatosis characterized by circular, dusty scaling, dyschromic patches, quite asymptomatic and mostly described in Japanese and blacks. The authors have seen three cases of pityriasis rotunda in a Sardinian family that are to be added to two other similar reports. The patients were all in good health. An interesting feature was the association with favism. On inquiry it was discovered that many more members of the family were affected by either or both pathologies. The authors believe this condition to be a form of minor acquired ichthyosis of which Sardinia could be an ethnic center.

Adult↗
PubMed1990

Incidence of polycystic ovaries in patients with late-onset or persistent acne: hormonal reports.

Forty-six women affected by late-onset or persistent acne were studied in order to investigate the frequency of hormonal abnormalities and polycystic ovaries. Hirsutism, perioral distribution of acne lesions and irregular menses were recorded. Hormonal measurements and ovarian echographies were performed. Twenty-four patients were affected with polycystic ovaries, detected by ultrasound scanning. Among the acne patients, the women with ovarian abnormalities had higher values of androstenedione, dehydroepiandrosterone, dehydroepiandrosterone sulfate and luteinizing hormone (LH), and a higher LHT/follicle-stimulating hormone ratio than those with acne and without ovarian abnormalities. This study indicates the prevalence of polycystic ovaries in women with late-onset or persistent acne. Moreover, hormonal abnormalities indicate a subgroup of acne patients defined by the presence of ovarian disorders.

Acne Vulgaris↗
PubMed1990

[Chronic urticaria and allergy to Acari. Experience with a specific desensitization therapy].

Eighty-five patients affected by chronic urticaria (45 females and 40 males) were submitted to intradermal tests with house and storage mites in order to evaluate a possible sensitization to these allergens. The same allergological tests were performed in an 80-subject control group. The results showed immediate cutaneous reactivity to one or more mites in 40 patients (47%) while only 6 positivities (7.5%) were found in the control group. 27 patients, out of the 40 allergic to mites, were submitted to specific desensitizing therapy. 6 of them showed a complete recovery, 20 good results and only 1 slight improvement of clinical manifestations. These data allow us to hypothesize that the allergy to mite allergens is an important etiopathogenic factor in several chronic so called "idiopathic" urticarias.

Adolescent↗
PubMed1989

[Skin diseases and primarily dermatologic cutaneous manifestations of venous disorders. Clinical elements and differential diagnosis].

The paper describes the most common dermatoses having a venous pathogenesis, with particular reference, because of their incidence, to the cutaneous manifestations of varicose syndrome. The pathophysiological basis, clinical picture and diagnostic investigations of dermatoses in venous diseases are discussed and compared with other cutaneous manifestations of non-venous diseases with which they are easily confused. The great importance of a specialised multidisciplinary approach for the correct management of a patient with these dermatological problems is emphasised.

Diagnosis, Differential↗
PubMed1987

A comparative study on peripheral blood lymphocyte subpopulations in different kinds of warts.

Peripheral blood T-cell subpopulations were evaluated in 36 patients with clinically different types of warts, subdivided in 4 groups (common, genital, flat and plantar warts). A significant decrease was found in OKT3 and OKT4 subsets total count and in OKT4/OKT8 ratio in patients with common and genital warts as compared with controls. Only in common and genital warts did we also observe a significant decrease of percentage of OKT4 subset. No significant difference of considered parameters was observed in flat and plantar warts as compared to controls, apart from a significant increase in number of OKT8 subset in flat warts. We then discuss this different status of C.M.I. in patients with different clinical warts, stressing the importance of various types of HPV.

Adolescent↗
PubMed1987

Evaluation of efficacy and tolerability of K-FA fluocinolone acetonide tape.

In order to assess the efficacy and tolerability of a fluocinolone acetonide tape (8 micrograms/cm2), 30 volunteer out-patients, 11 females and 19 males, mean age 43.4 years, affected by different kinds of dermatoses were treated. The tape was applied once or twice daily for an average period of 9.3 days. At the beginning and the end of the treatment, detailed dermatological and blood chemistry examinations were performed in all the patients. The clinical results were excellent for all the dermatoses treated. Itching at the site of application was reported by two patients and slight atrophy was observed in one patient. The patients' compliance was excellent. The blood chemistry tests showed no significant variation.

Administration, Cutaneous↗