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G Landi

Publications and source records attributed to G Landi.

At least 37 records · Page 2Linked to original sources
PubMed1996

Factor V gene mutation is a risk factor for cerebral venous thrombosis.

To evaluate the association between coagulation defects and cerebral venous thrombosis, a case-control study was conducted in 25 patients who had no autoimmune, neoplastic or infections disease and 75 healthy individuals. There were no patients with deficiency of protein C or protein S. Four had resistance to activated protein C (APC) and one had APC resistance associated with antithrombin deficiency. APC resistance was investigated by DNA analysis, and diagnosed by the presence of a point mutation in the factor V gene, which predicts replacement of Arg506 with Gln at one of the two APC cleavage sites in activated factor V. The prevalence of APC resistance was 20% in patients and 2.7% in controls. This difference was statistically significant (p = 0.01) and the odds ratio was 9.1. A circumstantial factor predisposing to cerebral venous thrombosis (such as oral contraceptive intake, pregnancy, puerperium, trauma or prolonged immobilization) was reported in 72% of cases. In conclusion, APC resistance is the most frequent coagulation abnormality associated with cerebral venous thrombosis.

Adult↗
PubMed1995

[Antibiotic prophylaxis with mezlocillin in elective biliary surgery].

The authors report their experience of antibiotic prophylaxis in elective biliary surgery pertinent to 246 operated patients treated with short-term prophylaxis with mezlocillin. This method has turned out to be efficacious in reducing postoperative infections incidence, particularly in simple cholecystectomy. Therefore the authors advise using such a procedure in this frequent operation too.

Biliary Tract Surgical Procedures↗
PubMed1995

Disseminated granuloma annulare in acquired immunodeficiency syndrome: case report and review of the literature.

The authors report the case of a 27-year-old woman who presented with disseminated granuloma annulare in association with acquired immunodeficiency syndrome. The lesions were asymptomatic, tiny, erythematous or flesh-colored umbilicated papules on the neck, trunk, and flexor surface of the arms and knees that regressed without any treatment in two months. The case reported is the nineteenth description of the association of granuloma annulare and acquired immunodeficiency syndrome but the first in a female patient. The causes and pathogenesis of granuloma annulare are unknown, but after reviewing the previous case reports we hypothesize that circulating human immunodeficiency virus particles may be a precipitating factor in granuloma annulare and that the CD4+ and CD8+ cell dysfunction may be responsible for the atypically short course of the disease.

Acquired Immunodeficiency Syndrome↗
PubMed1994

Treatment of psoriasis vulgaris with topical calcipotriol: is the clinical improvement of lesional skin related to a down-regulation of some cell adhesion molecules?

Calcipotriol is demonstrably efficacious for the treatment of psoriasis by virtue of its effects on the skin's immune system and on epidermal growth. We performed this study to emphasize the difference in the expression of certain cell adhesion molecules (CAMs) (ICAM-1, ELAM-1, LFA-1, VLA-3, VLA-6) in lesional and perilesional skin of 10 patients with psoriasis, before and after treatment with topical Calcipotriol. We took two biopsies of lesional and perilesional skin from each patient before and after treatment and then performed an immunohistochemical study to observe the expression of these CAMs, utilizing monoclonal antibodies against these adhesion molecules. We noticed reduced levels of infiltrating cells along with the expression of ICAM-1, LFA-1, ELAM-1 and of CAMs VLA-3, VLA-6 in basal and suprabasal keratinocytes. On the basis of these data we hypothesize that, besides epidermal keratinocytes, another target for Calcipotriol may be the skin's own immune system, suggesting that Calcipotriol can modify T lymphocyte activity (IL-1 dependent) through a down-regulation of CAMs.

Administration, Topical↗
PubMed1993

Pathogenetic and prognostic features of lacunar transient ischaemic attack syndromes.

Lacunar ischaemic stroke syndromes are a well defined subgroup of ischaemic strokes. To determine whether a similar subgroup can be identified among patients with transient ischaemic attacks (TIAs) we studied prospectively 102 consecutive patients within 24 hours of their first TIA. Based on their history they were classified as lacunar TIA syndromes (LTIAS; n = 45) if isolated motor or sensory symptoms or their combination had involved at least two of three body parts (face, arm, leg), whereas all other subjects were grouped as non-lacunar TIA syndromes (NLTIAS; n = 57). All patients were investigated according to a standardised protocol and followed up for an average of 51.1 months. Cardiac and arterial sources of thromboembolism were more frequent among NLTIAS (p = 0.0001). Survival curve analysis demonstrated that LTIAS had a significantly lower long term mortality and incidence of major vascular events. In a multivariate regression analysis, the type of TIA (that is, NLTIAS) was an independent predictor of stroke or death. LTIAS share the same distinct pathogenetic and prognostic features of lacunar ischaemic stroke syndromes. These findings have implications for management of TIAs and for studies of their natural history and treatment.

Adult↗
PubMed1993

Focal cerebral ischemia in young adults: a collaborative case-control study. The National Research Council Study Group.

Because there is uncertainty about the role of atherogenic and nonatherogenic risk factors for cerebral ischemia in the young, we carried out a multicenter, hospital-based, case-control study. 333 patients (15-44 years) with focal cerebral ischemia (transient ischemic attack or stroke within 8 weeks of admission) were eligible. 25 patients were excluded, according to the protocol. 308 cases were matched by age and gender to one hospital and one population control. Independent risk was shown by logistic conditional regression for migraine with aura [odds ratio (OR) = 14.8], smoking (OR = 3.7), alcohol (OR = 2.8), serum triglycerides (OR = 1.6), arrhythmias (OR = 9.5), mitral stenosis (OR = 56), coronary heart disease (OR = 4.3) and carotid stenosis or occlusion (OR = 41). Serum HDL-cholesterol had a relative protective effect (OR = 0.8). These data confirm the role of atherosclerosis and cardiac diseases as well as migraine with aura and alcohol consumption in the pathophysiology of cerebral ischemia in the young. More thorough prevention programs may contribute to earlier detection and control of all of these risk factors, but further investigations in patients with as yet unidentified risk factors are warranted because the above-mentioned factors do not account for the total risk of ischemic stroke in the young.

Adolescent↗
PubMed1993

Carcinoma cuniculatum of the nail apparatus: report of three cases.

Three patients affected by carcinoma cuniculatum involving the nail apparatus are reported. The toes were affected in 2 cases, the thumb in 1 case. In the first patient the tumour developed in the subungual area and resulted in loss of the toe-nail. In the second patient the tumour originated on the dorsum of the toe and subsequently involved the proximal nail fold. In the third patient the tumour developed in the nail bed resulting in loss of the lateral part of the nail plate. The pathology showed in all cases invaginating strands of well-differentiated keratinocytes, some of which had central crypts containing keratinous debris. Radical excision of the tumour required disarticulation of the digit in 2 cases, whereas Mohs micrographic surgery was performed in the third case.

Aged↗
PubMed1992

[A rare tumor: desmoid of the musculus rectus abdominis. Apropos a clinical case].

The authors report a case of left abdominal rectum muscle desmoid tumor which has been surgically treated. After some considerations of the particular pathogenetic, anatomopathological and clinical characteristics of this neoplasm, they state that a precise preoperative diagnosis is always difficult, in spite of modern diagnostic means. They conclude that, nowadays, surgical extirpation is the most reliable therapeutical method, although it is burdened by a consistent incidence of local recidives (over 30%).

Abdominal Muscles↗
PubMed1992

[Thymostimulin immunoprophylaxis in elective abdominal surgery].

The Authors report their experience of 121 patients who had undergone an elective abdominal operation and who had been previously considered under an immunological point of view and classified as anergic. The Authors have found a notable reduction of postoperative infection incidence in the 61 anergic operated patients who have been treated with Thymostimulin; they conclude by underlining the importance of careful consideration and eventual correction of immunological alterations of the patients of the patients who must undergo an operation.

Abdomen↗
PubMed1992

Venous thromboembolism in acute stroke. Prognostic importance of hypercoagulability.

To assess the incidence, risk factors, and clinical importance of deep vein thrombosis in acute stroke, we studied 70 consecutive patients who underwent hemostasis screening at the time of entry into the study and followed up these patients with serial venous Doppler examinations and the iodine 125-labeled fibrinogen uptake test. Mortality was significantly higher among the 20 patients who developed a deep vein thrombosis, and eight of them had necropsy evidence of pulmonary embolism. Severity of leg paresis and a shortened activated partial thromboplastin time were significantly associated with subsequent deep vein thrombosis with multivariate analysis. Significantly higher levels of fibrinopeptide A were found in patients with postmortem evidence of pulmonary embolism. Deep vein thrombosis is a frequent complication of acute stroke and may influence the prognosis by inducing pulmonary embolism. Our findings allow rapid identification of high-risk patients who may benefit maximally from prophylactic treatment of venous thromboembolism.

Adult↗