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Biomedical subjects

J L Verbov

Publications and source records attributed to J L Verbov.

At least 19 recordsLinked to original sources

The use of cimetidine to reduce dapsone-dependent methaemoglobinaemia in dermatitis herpetiformis patients.

1. We have attempted to reduce dapsone-dependent methaemoglobinaemia formation in six dermatitis herpetiformis patients stabilised on dapsone by the co-administration of cimetidine. 2. In comparison with control, i.e. dapsone alone, methaemoglobinaemia due to dapsone fell by 27.3 +/- 6.7% and 26.6 +/- 5.6% the first and second weeks after commencement of cimetidine administration. The normally cyanotic appearance of the patient on the highest dose of dapsone (350 mg day-1), underwent marked improvement. 3. There was a significant increase in the trough plasma concentration of dapsone (2.8 +/- 0.8 x 10(-5)% dose ml-1) at day 21 in the presence of cimetidine compared with control (day 7, 1.9 +/- 0.6 x 10(-5)% dose ml-1, P less than 0.01). During the period of the study, dapsone-mediated control of the dermatitis herpetiformis in all six patients was unchanged. 4. Trough plasma concentrations of monoacetyl dapsone were significantly increased (P less than 0.05) at day 21 (1.9 +/- 1.0 x 10(-5)% dose ml-1) compared with day 7 (1.6 +/- 0.9 x 10(-5)% dose ml-1:control). 5. Over a 12 h period, 20.6 +/- 8.9% (day 0) of a dose of dapsone was detectable in urine as dapsone hydroxylamine. Significantly less dapsone hydroxylamine was recovered from urine at day 14 (15.0 +/- 8.4) in the presence of cimetidine, compared with day 0 (control: P less than 0.05). 6. The co-administration of cimetidine may be of value in increasing patient tolerance to dapsone, a widely used, effective, but comparatively toxic drug.

Adult

Inflammatory ringworm with unusual features.

Zoophilic dermatophyte infections are often inflammatory but severe widespread inflammatory lesions of glabrous skin, as in the female patient described, are unusual. Most cases of M. canis ringworm can be traced to an infected animal. This dermatophyte is associated with a variety of clinical presentations on glabrous skin and is being isolated with increasing frequency in some countries.

Adult

Is erythrokeratoderma one disorder? A clinical and ultrastructural study of two siblings.

Two sisters with erythrokeratoderma are described. In the younger sister the clinical appearance corresponded to erythrokeratoderma variabilis (EKV), whereas in the older sister it corresponded to progressive symmetrical erythrokeratoderma (PSEK). Ultrastructural findings in both cases were identical. We suggest that EKV and PSEK are different manifestations of a single condition.

Child

Carcinoma of breast and scleroderma: four further cases and a literature review.

Four patients are described in whom scleroderma developed within 18 months of detection of breast carcinoma. Previously reported cases of this association and the relevant literature are reviewed. The available evidence suggests that in some women there may be a causal relationship between breast cancer and scleroderma or progressive systemic sclerosis.

Adenocarcinoma, Scirrhous

Trauma-induced bullous pemphigoid.

We describe three patients with bullous pemphigoid who presented with bullae at sites of trauma and with little spread of the condition outside such areas. The diagnosis was confirmed by histology and direct and/or indirect immunofluorescence; electron microscopy was performed in two cases to rule out the diagnosis of epidermolysis bullosa acquisita (EBA). Treatment was with either systemic steroids or ACTH in all three cases. Trauma-induced bullous pemphigoid should be included in the differential diagnosis of localized blistering eruptions.

Aged

Scleromyxoedema--successful treatment with plasma exchange and immunosuppression.

A 34-year-old woman with scleromyxoedema failed to respond to initial treatment with cyclophosphamide or psoralen-UVA photochemotherapy (PUVA). She developed neurological symptoms which resolved after five 4 l plasma exchanges performed on successive days, together with pulse methylprednisolone therapy. Subsequent treatment was with oral prednisolone and cyclophosphamide. She had had no further episodes of neurological dysfunction 8 months after plasma exchange, and the appearance of the skin had improved almost to normal. The complications and difficulty in management of scleromyxoedema are discussed.

Adult

Necrobiotic xanthogranuloma with paraproteinaemia.

A 66-year-old man with necrobiotic xanthogranuloma associated with paraproteinaemia is described. He also had long-standing normolipaemic plane xanthomata. Treatment was with melphalan 0.15 mg/kg body weight/day. Initially, three 5-day courses were given at 4-weekly intervals but a fourth course was necessary after a further 4 months because of a deterioration in both his skin and associated systemic symptoms.

Aged