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Biomedical subjects

S Krzisch

Publications and source records attributed to S Krzisch.

6 recordsLinked to original sources

[Acral purpura and hyperhomocysteinemia].

INTRODUCTION: Increased level of homocysteine has been shown to be associated with atherosclerotic disease and venous thrombosis. There are only exceptional reports of cutaneous disease due hyperhomocysteinemia. CASE REPORT: A 71-year-old man presented with an acral purpura mainly located under the nail plates and resulting in onycholysis. Histologic examination of a skin biopsy specimen showed thromboses of dermal vessels without vasculitis. Laboratory tests revealed highly elevated homocysteinemia due to a mutation in the methylene-tetra-hydrofolate-reductase gene. No other cause of purpura or thrombophilia was found. When oral folic acid was given, both homocysteinemia and cutaneous lesions were controlled. However, a biological and clinical recurrence occurred when therapy was discontinued. DISCUSSION: Hyperhomocysteinemia has probably a causal role in this original case of acral purpura. Since treatment is effective, the detection of hyperhomocysteinemia should be proposed in patients with cutaneous lesions secondary to distal vascular thromboses.

Aged↗

[Plantar hidradenitis].

INTRODUCTION: Plantar hidradenitis, one of several possible causes of painful papulo-nodular lesions of the foot in children and young adults, was recently described as the presence of characteristic lesions of the eccrine sweat glands. CASE REPORT: A 15-year-old boy consulted for a sudden-onset painful eruption on the sole of the right foot. Physical examination revealed papulo-nodular erythromato-violet infiltrated lesions located on the anterior part of the right planta. Histology examination showed dense neutrophil inflammatory infiltration predominating at the dermo-hypodermic junction around the eccrine sweat glands. The excretory ducts of the sweat glands were infiltrated but the secretory glomerulae were intact. A dense infiltration of venular thrombi without vasculitis was also seen. The lesion regressed with aspirin (8 days) and rest. No recurrence has been recorded after 18 months. DISCUSSION: This clinical and histological presentation led to the diagnosis of plantar hidradenitis, confirming the disease entity. Former cases may have been described as trauma-induced plantar urticaria or plantar erythema nodosum. This diagnosis should be entertained in children or young adults with painful papulo-nodular eruptions of the soles. The histology examination should include the eccrine sweat glands.

Adolescent↗

[Multiple keratosis induced by hydroxyurea].

INTRODUCTION: Specific skin manifestations including skin atrophy and stripes of erythema on the extremities have been reported in patients with long-term treatment with hydroxyurea (HU). CASE REPORT: A 60-year-old patient who had been treated with HU since 1986 for chronic myeloid leukaemia presented in March 1992 with lesions characteristic of HU-induced skin changes. Hydroxyurea was continued for two more years and the lesions worsened. Unusually encountered multiple skin keratoses developed rapidly creating a clinical picture compatible with carcinomatous transformation until the withdrawal of hydroxyurea. DISCUSSION: The chronology and the clinical signs were in favour of implicating hydroxyurea in the development of these keratoses. The literature on the subject revealed one comparable case with actinic keratoses and multiple skin carcinomas. The interactions between hydroxyurea and the keratinocytes of the basal layer could explain different aspects of hydroxyurea-related toxidermia. The most severe manifestation could be the development of epithelial skin cancer.

Female↗

[Malignant dermohypodermic melanoma of the soft tissues].

INTRODUCTION: Melanoma of the soft tissue is a rare tumor that develops in most cases in the deep structures, only rarely involving the skin surface. We report an exceptional case of melanoma of the superficial soft tissue, exclusively involving the skin surface. OBSERVATION: A 35-year-old man presented with a superficial, pink, soft, mobile, lesion on the thigh. The histological examination revealed a tumoral proliferation of the reticular dermis and hypodermis, composed of pale giant cells grouped in nests or in lobules separated by connective ducts. Immunostaining was positive for HMB45, protein S-100, vimentine and NKIC3. It was negative for EMA, CD34, smooth muscle actin, cytokeratine and desmine. The search for a metastatic localization was negative. Extensive exeresis was performed. Three years later, the patient was still in complete remission. The macroscopic, histological and immunohistochemical examinations concluded in the diagnosis of a strictly dermohypodermic melanoma of the soft tissues. DISCUSSION: Our case report of a melanoma of the soft tissues is original because of the superficial localization of the tumor that, to our knowledge, has never been reported. It underlines the interest of performing systematic biopsies of any fast growing cutaneous lesion of recent discovery.

Adult↗