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      Cancerização de lóbulos: correlação de achados mamográficos e histológicos Translated title: Cancerization of lobules: correlation between mammography and histological findings

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          Abstract

          OBJETIVO: Caracterizar os aspectos mamográficos de cancerização de lóbulos associados a carcinoma ductal in situ (CDIS), por meio de correlação entre achados de imagem e histológicos. MATERIAIS E MÉTODOS: O presente estudo retrospectivo foi baseado em uma revisão de laudos histopatológicos de 135 pacientes submetidas a biópsia de mama. O diagnóstico de cancerização de lóbulos associada a CDIS foi confirmado em 12 das pacientes. Dois casos foram excluídos porque os cortes histopatológicos não estavam disponíveis para correlação da patologia com a mamografia. Todas as imagens mamográficas foram retrospectivamente analisadas às cegas quanto aos resultados histológicos e classificados por dois experientes radiologistas especializados em mama. RESULTADOS: Nove casos (90%) apresentavam microcalcificações redondas agrupadas e um (10%) apresentava calcificações lineares. A distribuição das calcificações foi definida como lobular em todos os casos. A análise histopatológica demonstrou quatro casos de CDIS cribriforme, dois casos de comedocarcinoma, um caso de CDIS sólido, um caso de CDIS cribriforme associado com sólido e um caso de CDIS cribriforme associado com sólido e comedocarcinoma. No caso em que havia calcificações redondas e lineares, o subtipo histológico era de CDIS cribriforme. Com relação ao número de microcalcificações, nove casos apresentavam mais do que 20 e apenas um caso apresentava menos do que 10 microcalcificações. CONCLUSÃO: Na presente coorte, a avaliação mamográfica de pacientes com CDIS apresentando cancerização de lóbulos demonstrou agrupamentos de microcalcificações redondas com distribuição lobular. Embora agrupamentos de calcificações redondas sejam normalmente associados a um processo benigno, a cancerização de lóbulos por CDIS pode produzir um padrão similar, mimetizando, assim, uma condição benigna.

          Translated abstract

          OBJECTIVE: To characterize the mammographic appearance of cancerization of lobules by ductal carcinoma in situ (DCIS), by correlating imaging and histological findings. MATERIALS AND METHODS: This retrospective study was based on a review of the histopathological reports of 135 patients who underwent breast biopsy. A diagnosis of cancerization of lobules by DCIS was confirmed in 12 patients. Two cases were excluded because the histopathological sections were not available to correlate pathological and mammographic findings. All mammograms were retrospectively reviewed and categorized by two experienced breast radiologists, with no knowledge of the histological findings. RESULTS: Nine cases (90%) presented clusters of round microcalcifications, and one (10%) had round and linear calcifications. The distribution of the calcifications was defined as lobular in all the cases. Histopathological study showed four cases of cribriform DCIS, two cases of comedo DCIS, one case of solid DCIS, one case of cribriform associated with solid DCIS, and one case of cribriform associated with solid and comedo DCIS. In the case showing round and linear calcifications, the histological subtype was cribriform DCIS. With respect to the number of microcalcifications, nine cases presented more than 20, and only one case showed less than 10 microcalcifications. CONCLUSION: In our cohort, the mammographic evaluation of patients with DCIS presenting cancerization of lobules demonstrated clusters of microcalcifications in a lobular distribution. Although clusters of round calcifications are typically associated with a benign process, cancerization of lobules by DCIS may produce a similar pattern, thus mimicking a benign condition.

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          Pathology of the Breast

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            Predictors of invasion in patients with core-needle biopsy-diagnosed ductal carcinoma in situ and recommendations for a selective approach to sentinel lymph node biopsy in ductal carcinoma in situ.

            Among patients with core-needle biopsy (CNB)-diagnosed ductal carcinoma in situ (DCIS), the guidelines for the selection of patients to undergo sentinel lymph node (SLN) biopsy are not well defined, and many patients with no invasion undergo an unnecessary SLN biopsy. The objective of this study was to identify the predictors of invasion in patients with CNB-diagnosed DCIS and, thus, to help determine the most appropriate candidates for SLN biopsy. The authors retrospectively evaluated 200 consecutive patients with CNB-diagnosed DCIS who underwent final excision at their institution between May 1, 2002 and June 30, 2005. Demographic data, the size and type of lesion on imaging studies, histologic features of DCIS on CNB, the number of cores taken, and the number of cores involved by DCIS were correlated with invasion on excision and SLN biopsy outcome. Forty-one of 200 patients (21%) had invasive carcinoma diagnosed on final excision. Parameters that correlated with invasion were a mass lesion, lesion size >1.5 cm, high nuclear grade, and the presence of lobular cancerization on CNB. A multivariate logistic regression model was developed to predict invasion. At the time of breast surgery, 103 of 200 patients (52%) underwent SLN biopsy, and 34 had invasion diagnosed on final excision. Three patients had 1 positive SLN each. A mass lesion, lesion size >1.5 cm, and the presence of lobular cancerization on CNB were significant, independent predictors of invasion in patients with DCIS. The authors recommended the inclusion of these predictors in the guidelines for selecting patients for SLN biopsy to reduce the number of unnecessary procedures. 2006 American Cancer Society
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              Breast Imaging

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                Author and article information

                Journal
                rb
                Radiologia Brasileira
                Radiol Bras
                Publicação do Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (São Paulo, SP, Brazil )
                1678-7099
                October 2011
                : 44
                : 5
                : 275-278
                Affiliations
                [01] Niterói RJ orgnameUniversidade Federal Fluminense orgdiv1Departamento de Radiologia Brasil
                [02] Rio de Janeiro RJ orgnameUniversidade Federal do Rio de Janeiro Brasil
                [03] Niterói RJ orgnameUniversidade Federal Fluminense orgdiv1Departamento de Radiologia Brasil
                [05] Niterói RJ orgnameUniversidade Federal Fluminense orgdiv1Departamento de Radiologia
                [06] Rio de Janeiro RJ orgnameUniversidade Federal do Rio de Janeiro Brasil
                [04] Niterói RJ orgnameUniversidade Federal Fluminense orgdiv1Departamento de Patologia Brasil
                Article
                S0100-39842011000500003 S0100-3984(11)04400503
                b339631b-fd82-41b1-bf12-77acd4754fa2

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 14 May 2011
                : 23 February 2011
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 9, Pages: 4
                Product

                SciELO Brazil

                Categories
                Artigos Originais

                Mammography,Microcalcificações,Carcinoma ductal in situ,Mamografia,Microcalcifications,Ductal carcinoma in situ

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