ABSTRACT INTRODUCTION: Benign tumors are often seen in breast screening examinations. However, the differential diagnosis is not always simple because of radiological similarity between the different benign lesions. CASE REPORT: We present a rare case report of leiomyoma of the breast parenchyma in a 68-year-old asymptomatic patient. The mammographic and ultrasonographic findings were similar to those observed in benign lesions. CONCLUSION: The histopathological diagnosis requires careful differentiation from lesions that have smooth muscle proliferation, especially leiomyosarcoma. The most commonly performed treatment is resection of the lesion with free margins. Although breast leiomyoma is rare, it should be considered among the differential diagnoses for breast nodules of benign appearance. Resection with safety margins proved to be the only treatment needed.

OBJETIVOS: Alterações genéticas são relacionadas à gênese e progressão do câncer. Neoplasias de vários órgãos expressam o oncogene c-erbB-2. Nas proliferações intraductais da mama tem sido avaliado como fator de risco para o desenvolvimento de câncer. Foram avaliadas a imunoexpressão do c-erbB-2 em lesões epiteliais proliferativas intraductais e as possíveis correlações com características anatomopatológicas do carcinoma ductal "in situ" (CDIS). MÉTODOS: Foi utilizado material de arquivo, amostras teciduais fixadas em formalina e incluídas em blocos de parafina de 88 mulheres. Destas, 51 com CDIS e 37 com hiperplasia ductal sem atipias (HDT). A idade variou de 35 a 76 anos. Revisados todos os casos, verificou-se: o grau nuclear, a presença de necrose, o subtipo histológico predominante e sua extensão. Obteve-se material suficiente para o estudo imunohistoquímico do c-erbB-2 de 84 sujeitos do estudo. RESULTADOS: Não foi observada a expressão do oncogene nas hiperplasias sem atipias e nos tecidos adjacentes a todas amostras teciduais. A expressão do c-erbB-2 foi verificada em nove (19,1%) dos CDIS (p= 0,0001). A imunoexpressão não se relacionou à extensão das lesões. A imunoexpressão do c-erbB-2 no CDIS correlacionou-se com subtipo histológico (p=0,019), com a presença de necrose (p=0,0066), com o grau nuclear (p=0,0084) e com a Classificação de Van Nuys (p=0,039). CONCLUSÕES: A expressão do c-erbB-2 foi estatisticamente significante nas lesões proliferativas de risco (CDIS) e correlacionou-se com características histopatológicas: alto grau nuclear, presença de necrose, subtipo comedo. Não houve expressão nas hiperplasias sem atipias e tecidos adjacentes.

OBJECTIVES: Genetic modifications are related to genesis and development of cancer. Neoplasias in various organs express the c-erbB-2 oncogene. In intraductal proliferations of the breast it has been assessed as a risk factor for subsequent development of carcinoma. The c-erbB-2 immunoexpression in intraductal epithelial proliferations and the relationship with histopathological characteristics of ductal carcinoma in situ (DCIS) were evaluated. METHODS: File material from 88 women, which were tissue samples formalin-fixed, paraffin-embedded blocks, was used. Of these 51 presented with DCIS and 37 with ductal hyperplasia without atypia. Ages of the women ranged from 35 to 76 years. All cases were reviewed and nuclear grade, presence of necrosis, preponderance of histological subtype and its extension were verified. Specimens were obtained for the c-erB-2 immunohistochemical study of 84 of the women in question. RESULTS: No expression of the oncogene was verified in the hyperplasias without atypias and in tissues adjacent to all tissue samples. Expression of c-erbB-2 was verified in 9 (19.1%) of the DCIS (p= 0.0001). Immunoexpression was not related to the extension of the lesions. The c-erbB-2 immunoexpression in DCIS was correlated to the histological subtype (p=0.019), necrosis (p=0.0066), nuclear grade (p=0.0084) and Van Nuys Classification (p=0.039). CONCLUSIONS: Expression of c-erbB-2 was significant in proliferative lesions with risk (DCIS) and was correlated to histopathological characteristics: high nuclear grade, presence of necrosis and comedy subtype. There was no expression in the hyperplasias without atypias and adjacent tissues.

Objetivo: estudar a associação entre diabete melito insulino-dependente de longa evolução com mau controle glicêmico e lesões inflamatórias da mama que podem, por vezes, simular carcinoma inflamatório. Métodos: no período de janeiro de 1998 a dezembro de 2001 foram estudadas, retrospectivamente, 18 pacientes em serviço de referência de mastologia que apresentavam lesão inflamatória da mama com ou sem tumoração palpável. As mesmas foram submetidas à dosagem sérica de glicose e hemoglobina glicosilada, bem como exames de imagem e análise histológica da glândula mamária, e tiveram como diagnóstico mastopatia diabética. Resultados: a média etária das pacientes foi de 50,2 anos e todas eram portadoras de diabete melito insulino-dependente, com tempo médio de evolução da doença de 14,9 anos. Todas apresentaram mau controle glicêmico, com glicemia sérica média de 329,6 mg/dL e hemoglobina glicosilada média de 9,7%. A dose média de insulina NPH utilizada ao dia era de 37,2 unidades. As pacientes foram submetidas a tratamento clínico com antibioticoterapia e controle dos níveis glicêmicos com insulina NPH e simples e tiveram resolução do quadro em aproximadamente cinco semanas. Conclusão: os profissionais envolvidos com cuidados à saúde da mulher precisam estar cientes desta patologia inflamatória das mamas e de seu caráter benigno, para evitarem-se condutas desnecessárias, muitas vezes prejudiciais à paciente.

Purpose: to study the association between long-standing type 1 diabetes with bad glycemic control and breast inflammatory lesions which can simulate inflammatory carcinoma. Patients and Methods: eighteen patients were studied, retrospectively, in a mastology reference center from January 1998 to December 2001, presenting with breast inflammatory lesion with or without palpable mass. They were submitted to serum glucose and glycosylated hemoglobin determination, as well as image examination and histopathologic analysis, and diabetic mastopathy was diagnosed. Results: the patients' average age was 50.2 years, and all had insulin-dependent diabetes mellitus, with average disease time of 14.9 years. All patients, with no exception, had a bad glycemic control; the average blood glucose was 329.6 mg/dL and the glycosilated hemoglobin average was 9.7%. NPH insulin dose being applied per day was 37.2 units. Patients underwent a clinical treatment with antibiotics and control of the glycemic levels with NPH insulin and had resolution of the symptoms in about five weeks. Conclusion: the professionals involved in women health care must be aware of this inflammatory pathology of the breast and its benign characteristics to avoid unnecessary procedures sometimes with patient injury.