Biomedical subjects
Publications and source records attributed to M Lomuto.
Fixed drug eruptions following the use of pyrazolone derivatives occurred in 4 members of the same family: a 12-year-old girl, her grandmother, and two of her great aunts. Although the pathophysiologic events leading to this type of reaction are unknown, these cases of familial occurrence suggest that genetic predisposition might be an important causal factor.
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We describe 2 cases of severe photosensitivity dermatitis following the use of nifedipine for arterial hypertension. In both cases casual rechallenge with nifedipine confirmed that this drug was the causative agent.
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Sacroiliac joint abnormalities were evaluated by computed tomography (CT) in 29 patients with psoriatic arthritis and in 15 with colitic arthritis. CT showed a better sensitivity than conventional X-ray analysis in the evaluation of the articular space alterations in psoriatic and colitic arthritis as well as in detecting erosions and ankylosis of sacroiliac joints in patients with ankylosing spondylitis or psoriatic arthritis. Thus, CT appears a promising tool for the early detection of the pathological changes of sacroiliac joints.
A radiographic study of the hands, using the method of optical enlargement or 'microradioscopy', was carried out on a group of 58 psoriatic patients suffering from different clinical forms of the disease, but without clinical symptoms of arthropathy. A significant statistical incidence for the following lesions was revealed: (a) focal discontinuity and irregularity of the tuft cortical, similar to a nail-stroke; (b) focal lamellar thickening of the periosteum; (c) small intraspongous geodes; (d) increase of the intracortical striae; (e) small juxta-articular erosions. The radiological aspect of the hands, characterized by monolateral and variously combined lesions (with the almost constant presence of the erosions of the tuft cortical) is characteristic, enough to be recognized as a marker of the disease. The authors assume that psoriasis is a systemic disease characterized by accelerated turnover, and that cutaneous and bone lesions represent a different clinical expression of this same biological process.
A significant increase of some HLA antigens (B13, B17) was shown in 122 psoriasis patients, compared to 176 unrelated individuals of the control group. This finding is not completely secondary to an increase in Cw6, supporting the opinion that different loci within the HLA region are responsible for different forms of the disease. Some familial cases of psoriasis suggest a possible involvement of Bw35, despite the fact that the increase of this antigen in a random population was not significant for the corrected value. In this case it seems likely that a gene associated with Bw35 may be responsible for an infectious form of disease. The fact that 32% of our psoriatic patients did not show either B13, B17 or Cw6, indicated that the Is gene could also segregate with an other haplotype. The Is gene is also dominant, with an incomplete penetrance of B17 and Bw35 among relatives.
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A case of Lichen aureus in a 15-year old boy is presented. The case is particularly underlined due to lesions on both legs.
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