30-5.Objectives The study analyzed skin diseases in a population sample of Finnish farmers descriptively and in the process validated the question "Do you have a skin disease now?" Methods All farmers from one Finnish municipality were surveyed for dermatoses, first with a questionnaire and then with a clinical examination of those who reported dermatoses. Another population of farmers answered a set of questions in~n~ediately before a clinical examination, and the self-report of current dermatosis was validated.Results Eczema was diagnosed for 66% of the women and 53% of the Inen who had reported dermatosis in the questionnaire study 6 to 12 months earlier. Toe-web maceration, psoriasis, folliculitis, and acne were, after eczema, the most frequent diagnoses (in that order). In more than 50% of the cases, the location of clinically determined dermatoses corresponded with the skin disease areas reported 6 to 12 months earlier. In the validation study, everyone who reported a skin disease immediately before the clinical examination were found to have a skin disease. In addition 22% of those not reporting dermatosis were found to have a skin disease. Toeweb maceration was the most colnlnon dermatosis not reported by the farmers.C O~C~U S~O~~S Finnish farmers suffered from the same type of dermatoses as other populations. The prevalence of eczema and hand eczema was similar to that of other risk populations. A self-report of current dermatosis is probably a good indicator of the point prevalence of explicit skin diseases in populations.

Pyoderma gangrenosum (PG) is an ulcerative skin disorder of unknown aetiology. We describe a 40-year-old woman with long-standing PG and who did not respond to the usual treatments; however, she was treated successfully with plasmapheresis followed by pulse intravenous cyclophospamide therapy.

Fabry's disease is a rare familial disorder of glycolipid metabolism which is caused by a deficiency of a lysosomal enzyme alpha-galactosidase. A Finnish family is described in which cornea verticillata was found in the father and 2 daughters. In all cases, there were symptoms suggesting Fabry's disease: febrile episodes the origin of which was not clear, limb pains and, in the case of the father, 20 years of proteinuria with elevated ESR, and hemiplegia and aphasia following a cerebral thrombosis at the age of 43. The diagnosis was confirmed by demonstration of an alpha-galactosidase deficit in the serum and urine of all patients. Deficiency of this enzyme leads to abnormally high urinary tri- and dihexosyl ceramide levels, and this was observed in the father and the elder daughter. At the age of 12, the daughter had loss of vision in her right eye as a result of occlusion of the central retinal artery. Electron microscopic (EM) examination of the father's dermal angioma suggested Fabry's disease. Computerized cranial tomography of the father revealed not only the cerebrovascular condition but also a disease affecting the white matter of the brain.

Congenital Langerhans cell histiocytosis (LCH) is a rare condition with great diversity. A case of congenital skin-only LCH presenting as a "blueberry muffin baby" with a spontaneous regression by the age of 8 months is reported here. New insights into clinical manifestations and prognosis, which is not uniformly positive, are discussed. A thorough examination and a careful follow-up should be provided to these patients. Systemic therapy is warranted in multi-system disease; no consensus on treatment exists in case of LCH isolated to skin. The diagnosis of congenital self-healing LCH should be made only retrospectively.

In a population of 2005 Finnish farmers, 172 (8.6%) reported hand or forearm dermatoses in a self-administered questionnaire. 138 (80%) of them attended a clinical examination. Skin prick tests (SPTs) were done to 80% and patch tests (PTs) to 77% of the examined farmers. 93% of hand dermatoses were eczema and 70% were considered work-related. Cow allergy was found in 41 of 104 prick- and patch-tested farmers (39%). Immediate allergy to cow epithelium was encountered in a total of 28/41, in 20 with SPTs, and in 8 only with 20 min PTs. Delayed contact allergy to cow dander was found in 27/41. The result suggests that in addition to SPTs using commercial cow epithelium extract, PTs using fresh cow dander should also be done, and both immediate and delayed responses should be read.