Resumo Descreve-se o caso de uma doente do sexo feminino de 41 anos, previamente saudável, sem antecedentes de dermatite atópica ou dermatite alérgica. A doente é avaliada na consulta de dermatologia por uma erupção pruriginosa recorrente, mensal, com 3 anos de evolução. Essas lesões geralmente apareciam 5 a 7 dias antes do início da menstruação e desapareciam aproximadamente 3 a 4 dias após o período menstrual. A doente referiu que quando esteve 2 vezes grávida e não teve sintomas nesse período. Ela tinha sido previamente tratada com anti-histamínicos e corticosteroides orais, com apenas alívio temporário. Ao exame físico, durante a fase lútea do período menstrual, a doente apresentava múltiplas maculopápulas eritematoedematosas, pruriginosas, distribuídas por todo o corpo. Vários estudos laboratoriais foram realizados e todos estavam normais ou negativos, incluindo testes de autoanticorpos e análises hormonais. Testes epicutâneos com a série padrão do Grupo Português de Dermatite de Contato (GPEDC), série de corticosteróides e série de metais revelaram reações positivas ao sulfato de níquel (++) e cloreto de paládio (+) às 72 horas. Foi realizado um teste intradérmico com medroxiprogesterona nas concentrações de 0.1 e 10 mg/mL no 7o dia do ciclo menstrual. O teste foi positivo 2 horas após a injeção e persistiu por 24 horas. Foi feito o diagnóstico de dermatite autoimune à progesterona e a doente foi tratada com tamoxifeno 40 mg/dia, com praticamente completa resolução clínica. Quatro meses após, a dose foi reduzida, sem recaída. Seis meses depois a doente continua sem sintomas ou efeitos adversos.

Abstract A 41-year-old female patient presents to the dermatology department with a 3-year history of a monthly relapsing pruritic eruption. These lesions appear 5-7 days before the onset of menses and resolve 3-4 days after menstruation. During her two previous pregnancies, she had no symptoms. She had been previously treated with antihistamines and oral corticosteroids with only temporary relief. On examination, during the luteal phase, the patient presented multiple maculopapular pruritic wheals distributed throughout the body. Several laboratory studies were performed and were all normal or negative, including auto-antibodies tests and hormonal analysis. Patch tests with the standard series of the Portuguese Contact Dermatitis Group, corticosteroid series, and metal series revealed positive reactions to nickel sulfate (++) and palladium chloride (+) at 72 h. An intradermal test with medroxyprogesterone at concentrations of 0.1 and 10 mg/mL was performed on the 7th day of the menstrual cycle. The test was positive 2 h after the injection and persisted for 24 h. The diagnosis of autoimmune progesterone dermatitis was made and the patient started tamoxifen 40 mg/day, with almost complete clinical clearing. Four months after, the dose was reduced, with no relapsing. Six months later, the patient remains free of symptoms.

Abstract Sweet's syndrome is a neutrophilic dermatosis with worldwide distribution that has been associated with inflammatory autoimmune diseases, infections, malignancies, drugs, and pregnancy. The disease is idiopathic in up to 50% of patients. A 64-year-old woman, diagnosed with right limb cellulitis (4 days of evolution), was seen at our department, due to persistent cellulitis and progressive appearance of painful nodules and plaques in both shins and the right forearm (2 days of evolution). Taken together, clinical, laboratory and pathological data suggested the diagnosis of Sweet's syndrome, probably secondary to cellulitis of the right inferior limb. We suggest that cellulitis may be associated with Sweet's syndrome, a rare association in the literature.

Abstract Syringoma is a benign, adnexal tumor of the eccrine sweat gland ducts. Eruptive syringomas are a rare variant, occurring before or during puberty in most cases. A 57-year-old man was observed in our department, with a 10-year history of multiple brownish papules (1-4mm in diameter), localized on the neck, shoulders, trunk and axillae. The clinical diagnosis was cutaneous mastocytosis. Histopathological examination from a papule in the trunk was compatible with the diagnosis of syringoma. The patient was treated with isotretinoin, without any improvement. The clinical diagnosis of eruptive syringoma is diffi cult and histological examination is crucial for its diagnosis. Long-term morbidity is not associated with syringomas; they are treated for cosmetic reasons with unsatisfactory results.

Kikuchi's disease is a benign, self-limiting disease, whose pathogenesis remains unknown. Patients most often present with cervical lymphadenopathy, sometimes associated with fever and leukopenia. It has been reported that up to 40% of patients with Kikuchi's disease have also cutaneous eruptions, but no specific skin changes have been described. Kikuchi's disease can be subclassified into three histologic subtypes: a proliferative type, a necrotizing type and a xantomathous type. Most patients with Kikuchi's disease require no specific treatment, because the disease regresses spontaneously, within a few weeks to months. We report a case of a 31-year-old woman with xanthomatous type of Kikuchi's disease, whose first manifestation was the onset of erythematous papules with central suppuration on her face and on her left hand.