Accuracy of ultrasound-guided core-needle biopsy confronted with pathological findings and comparison of its costs with vacuum-assisted biopsy's costs

Introduction: Breast cancer screening has enhanced early­stage diagnosis by detection of impalpable tumors which require histopathological evaluation. Main percutaneous biopsy types are core-needle biopsy (CNB) and vacuum-assisted biopsy (VAB). CNB is less invasive and related to less bleeding and pain. VAB allows larger tissue samples and permits metal clip placement in biopsy bed for posterior localization in case of surgery. Access to VAB is restricted in Brazil due to its high costs. Objectives: To evaluate the agreement between pathological results of ultrasound (US) guided CNB with metal clip placement and surgery and settle false negative rates (FNR), sensibility, specificity, and accuracy of this method, for breast lesions < 20 mm. Methods: 388 US-guided CNB were retrospectively reviewed. Results: Surgical excision was performed in 317 patients. Overall FNR was 9.8%, (5.2% for lesions 10­20 mm), sensibility 90.2% (94.8% for lesions 10­20 mm), specificity 94.9% (94.1% for lesions 10­20 mm), and accuracy 91.1% (94.7% for lesions 10­20 mm). Cost of VAB varies from 2.2 to 12.5 times US-guided CNB. With metal clip placement, VAB costs 1.95 to 5.2 times US-guided CNB. Conclusions: For lesions that can be identified in US, CNB with metal clip placement has high sensitivity, specificity, and accuracy, as well as low FNR.

Accuracy of ultrasound-guided core-needle biopsy confronted with pathological findings and comparison of its costs with vacuum-assisted biopsy's costs

Introduction: Breast cancer screening has enhanced early­stage diagnosis by detection of impalpable tumors which require histopathological evaluation. Main percutaneous biopsy types are core-needle biopsy (CNB) and vacuum-assisted biopsy (VAB). CNB is less invasive and related to less bleeding and pain. VAB allows larger tissue samples and permits metal clip placement in biopsy bed for posterior localization in case of surgery. Access to VAB is restricted in Brazil due to its high costs. Objectives: To evaluate the agreement between pathological results of ultrasound (US) guided CNB with metal clip placement and surgery and settle false negative rates (FNR), sensibility, specificity, and accuracy of this method, for breast lesions < 20 mm. Methods: 388 US-guided CNB were retrospectively reviewed. Results: Surgical excision was performed in 317 patients. Overall FNR was 9.8%, (5.2% for lesions 10­20 mm), sensibility 90.2% (94.8% for lesions 10­20 mm), specificity 94.9% (94.1% for lesions 10­20 mm), and accuracy 91.1% (94.7% for lesions 10­20 mm). Cost of VAB varies from 2.2 to 12.5 times US-guided CNB. With metal clip placement, VAB costs 1.95 to 5.2 times US-guided CNB. Conclusions: For lesions that can be identified in US, CNB with metal clip placement has high sensitivity, specificity, and accuracy, as well as low FNR.

Breast implant-associated anaplastic large cell lymphoma in li-fraumeni syndrome: case-based literature review / Linfoma anaplásico de grandes células associado a implante na síndrome de Li-Fraumeni: relato de caso baseado em revisão de literatura

Breast implant-associated anaplastic large cell lymphoma is a rare disease related to chronic seroma around breast implants. Breast implant-associated anaplastic large cell lymphoma has been recently recognized by the World Health Organization as a type of T-cell non-Hodgkin lymphoma of the breast. The main features comprise chronic seroma which develops a year posterior to breast surgery, with symptoms such as breast pain, swelling, skin hyperemia and a nodule or mass of the breast. Li-Fraumeni Syndrome is associated with germline TP53 mutation and enhances the risks of developing many types of cancers, including breast and hematologic malignancies. We report a case of a 56-year-old female with Li-Fraumeni Syndrome and a history of breast cancer who underwent a mastectomy to treat breast cancer and prophylactic contralateral nipple-sparing mastectomy followed by bilateral breast implant reconstruction with textured silicone implants. This patient developed Breast implant-associated anaplastic large cell lymphoma seven years later. A literature review on multidisciplinary approach to this condition was performed.

O linfoma anaplásico de células grandes associado ao implante mamário é uma doença rara relacionada ao seroma crônico em torno dos implantes mamários. O linfoma anaplásico de células grandes associado ao implante foi recentemente reconhecido pela Organização Mundial de Saúde como um tipo de linfoma não-Hodgkin de células T da mama. As principais características incluem o seroma crônico que se desenvolve um ano depois da cirurgia da mama, com sintomas como dor na mama, inchaço, hiperemia da pele e um nódulo ou massa da mama. A síndrome de Li-Fraumeni está associada à mutação da linha germinativa no TP53 e aumenta o risco de desenvolvimento de muitos tipos de câncer, incluindo neoplasias mamárias e hematológicas. Relatamos um caso de uma mulher de 56 anos de idade com Síndrome de Li-Fraumeni e um histórico de câncer de mama submetido a uma mastectomia para tratar câncer de mama e mastectomia profilática contralateral poupadora de mamilo seguida de reconstrução bilateral de implantes mamários com implantes de silicone texturizados. Esta paciente desenvolveu linfoma anaplásico de células grandes associado ao implante mamário sete anos depois. Foi realizada uma revisão da literatura sobre uma abordagem multidisciplinar para essa condição.

Magnetic resonance imaging of the breast: role in the evaluation of ductal carcinoma in situ.

Ductal carcinoma in situ (DCIS) is a precursor mammary lesion whose malignant cells do not extend beyond the basement membrane and presents a risk of progression to malignant disease. Its early detection increased with screening mammography. The objective of this study was to review the literature on the main presentations of DCIS on magnetic resonance imaging (MRI), through searches of the Medline/PubMed, Latin-American and Caribbean Center on Health Sciences Information (Lilacs), and Scientific Electronic Library Online (SciELO) databases. DCIS can occur in its pure form or in conjunction with invasive disease, in the same lesion, in different foci, or in the contralateral breast. MRI has a high sensitivity for the detection of pure DCIS, being able to identify the non-calcified component, and its accuracy increases with the nuclear grade of the lesion. The most common pattern of presentation is non-nodular enhancement; heterogeneous internal structures; a kinetic curve showing washout or plateau enhancement; segmental distribution; and restricted diffusion. MRI plays an important role in the detection of DCIS, especially in the evaluation of its extent, contributing to more reliable surgical excision and reducing local recurrence.

O carcinoma ductal in situ (CDIS) é uma lesão mamária precursora cujas células malignas não ultrapassam a membrana basal e possui risco de evolução para doença maligna. Sua detecção precoce aumentou com a mamografia de rastreamento. O objetivo deste estudo foi realizar uma revisão da literatura sobre as principais apresentações do CDIS na ressonância magnética (RM), utilizando mecanismos de busca na base de dados Medline/PubMed, Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde (Lilacs) e Scientific Electronic Library Online (SciELO). O CDIS pode ocorrer de forma pura ou associado a doença invasiva, na mesma lesão, em focos diferentes e na mama contralateral. A RM possui alta sensibilidade para a detecção do CDIS puro, sendo capaz de identificar o componente não calcificado da doença e sua precisão aumenta com o seu grau nuclear. O padrão de apresentação mais comum é o realce não nodular com padrão interno heterogêneo, curva cinética de lavagem rápida (washout) ou platô, de distribuição segmentar e com restrição na difusão. A RM tem importante papel na detecção do CDIS e, principalmente, na avaliação da sua extensão, contribuindo para uma exérese cirúrgica mais confiável e reduzindo as recidivas locais.

Magnetic resonance imaging of the breast: role in the evaluation of ductal carcinoma in situ / Papel da ressonância magnética das mamas na avaliação do carcinoma ductal in situ

Abstract Ductal carcinoma in situ (DCIS) is a precursor mammary lesion whose malignant cells do not extend beyond the basement membrane and presents a risk of progression to malignant disease. Its early detection increased with screening mammography. The objective of this study was to review the literature on the main presentations of DCIS on magnetic resonance imaging (MRI), through searches of the Medline/PubMed, Latin-American and Caribbean Center on Health Sciences Information (Lilacs), and Scientific Electronic Library Online (SciELO) databases. DCIS can occur in its pure form or in conjunction with invasive disease, in the same lesion, in different foci, or in the contralateral breast. MRI has a high sensitivity for the detection of pure DCIS, being able to identify the non-calcified component, and its accuracy increases with the nuclear grade of the lesion. The most common pattern of presentation is non-nodular enhancement; heterogeneous internal structures; a kinetic curve showing washout or plateau enhancement; segmental distribution; and restricted diffusion. MRI plays an important role in the detection of DCIS, especially in the evaluation of its extent, contributing to more reliable surgical excision and reducing local recurrence.

Resumo O carcinoma ductal in situ (CDIS) é uma lesão mamária precursora cujas células malignas não ultrapassam a membrana basal e possui risco de evolução para doença maligna. Sua detecção precoce aumentou com a mamografia de rastreamento. O objetivo deste estudo foi realizar uma revisão da literatura sobre as principais apresentações do CDIS na ressonância magnética (RM), utilizando mecanismos de busca na base de dados Medline/PubMed, Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde (Lilacs) e Scientific Electronic Library Online (SciELO). O CDIS pode ocorrer de forma pura ou associado a doença invasiva, na mesma lesão, em focos diferentes e na mama contralateral. A RM possui alta sensibilidade para a detecção do CDIS puro, sendo capaz de identificar o componente não calcificado da doença e sua precisão aumenta com o seu grau nuclear. O padrão de apresentação mais comum é o realce não nodular com padrão interno heterogêneo, curva cinética de lavagem rápida (washout) ou platô, de distribuição segmentar e com restrição na difusão. A RM tem importante papel na detecção do CDIS e, principalmente, na avaliação da sua extensão, contribuindo para uma exérese cirúrgica mais confiável e reduzindo as recidivas locais.

Ultrasound-guided biopsy of breast calcifications using a new image processing technique: initial experience.

The aim of this paper is to describe the use of a new ultrasound imaging processing technique to guide biopsies of suspicious breast calcifications. We used this technique in 13 patients with suspicious breast calcifications that could not be submitted to stereotactic biopsy. Suspicious calcifications were identified by ultrasound, and the biopsy was successfully performed in all cases. Although mammography continues to be the method of choice for the detection and characterization of microcalcifications, this new technique can be an alternative means of guiding biopsy procedures in selected patients who are not candidates for stereotactic biopsy.

O objetivo deste trabalho é descrever o uso de uma nova técnica de processamento de imagens na ultrassonografia para guiar biópsia de microcalcificações mamárias suspeitas. Utilizamos esta técnica em 13 pacientes que não puderam ser submetidos a biópsia por estereotaxia. As calcificações suspeitas foram identificadas na ultrassonografia e a biópsia foi realizada com sucesso em todos os casos. Apesar de a mamografia ser o método de escolha para detecção e caracterização de microcalcificações, esta técnica pode ser uma alternativa para guiar biópsia em pacientes selecionados em que não foi possível realizar biópsia estereotáxica.

Ultrasound-guided biopsy of breast calcifications using a new image processing technique: initial experience / Biópsia de microcalcificações mamárias guiada por ultrassonografia: experiência inicial

Abstract The aim of this paper is to describe the use of a new ultrasound imaging processing technique to guide biopsies of suspicious breast calcifications. We used this technique in 13 patients with suspicious breast calcifications that could not be submitted to stereotactic biopsy. Suspicious calcifications were identified by ultrasound, and the biopsy was successfully performed in all cases. Although mammography continues to be the method of choice for the detection and characterization of microcalcifications, this new technique can be an alternative means of guiding biopsy procedures in selected patients who are not candidates for stereotactic biopsy.

Resumo O objetivo deste trabalho é descrever o uso de uma nova técnica de processamento de imagens na ultrassonografia para guiar biópsia de microcalcificações mamárias suspeitas. Utilizamos esta técnica em 13 pacientes que não puderam ser submetidos a biópsia por estereotaxia. As calcificações suspeitas foram identificadas na ultrassonografia e a biópsia foi realizada com sucesso em todos os casos. Apesar de a mamografia ser o método de escolha para detecção e caracterização de microcalcificações, esta técnica pode ser uma alternativa para guiar biópsia em pacientes selecionados em que não foi possível realizar biópsia estereotáxica.

Can diffusion-weighted imaging add information in the evaluation of breast lesions considered suspicious on magnetic resonance imaging?

OBJECTIVE: To assess the role of diffusion-weighted imaging (DWI) in the evaluation of breast lesions classified as suspicious on magnetic resonance imaging (MRI), correlating the findings with the results of the histological analysis. MATERIALS AND METHODS: This was a retrospective, descriptive study based on a review of the medical records of 215 patients who were submitted to MRI with DWI before undergoing biopsy at a cancer center. Apparent diffusion coefficient (ADC) values were calculated for each lesion, and the result of the histological analysis was considered the gold standard. RESULTS: The mean age was 49 years. We identified 252 lesions, 161 (63.9%) of which were found to be malignant in the histological analysis. The mean ADC value was higher for the benign lesions than for the malignant lesions (1.50 × 10-3 mm2/s vs. 0.97 × 10-3 mm2/s), the difference being statistically significant (p < 0.001). The ADC cut-off point with the greatest sensitivity and specificity on the receiver operating characteristic curve was 1.03 × 10-3 mm2/s. When the DWI and conventional MRI findings were combined, the accuracy reached 95.9%, with a sensitivity of 95.7% and a specificity of 96.4%. CONCLUSION: The use of DWI could facilitate the characterization of breast lesions, especially those classified as BI-RADS 4, increasing the specificity and diagnostic accuracy of MRI.

OBJETIVO: Avaliar o papel da sequência em difusão na avaliação de lesões mamárias suspeitas na ressonância magnética (RM), correlacionando seus achados com os resultados histológicos. MATERIAIS E MÉTODOS: Foi realizado estudo retrospectivo, descritivo, baseado na análise de prontuários médicos de 215 pacientes que realizaram RM com sequência em difusão e que foram submetidas a biópsia em um centro de referência oncológico. Foi calculado o valor do coeficiente de difusão aparente (ADC ­ apparent diffusion coefficient) para cada lesão e o resultado histológico foi considerado como padrão ouro. RESULTADOS: A idade média das pacientes foi 49 anos. Foram identificadas 252 lesões, e destas, 161 (63,9%) eram lesões malignas na avaliação histológica. A média obtida do valor do ADC nas lesões benignas (1,50 × 10­3 mm2/s) foi superior à média das lesões malignas (0,97 × 10­3 mm2/s), com significância estatística (p < 0,001). O ponto de corte com maior sensibilidade e especificidade pela curva receiver operating characteristic foi 1,03 × 10­3 mm2/s. Com a combinação da difusão com os achados da RM, a acurácia chegou a 95,9%, com sensibilidade de 95,7% e especificidade de 96,4%. CONCLUSÃO: O uso da sequência em difusão pode auxiliar na caracterização das lesões mamárias, principalmente daquelas classificadas como BI-RADS 4, aumentando a especificidade e a acurácia diagnóstica da RM.

Can diffusion-weighted imaging add information in the evaluation of breast lesions considered suspicious on magnetic resonance imaging? / A difusão pode acrescentar informações na avaliação de lesões mamárias suspeitas na ressonância magnética?

Abstract Objective: To assess the role of diffusion-weighted imaging (DWI) in the evaluation of breast lesions classified as suspicious on magnetic resonance imaging (MRI), correlating the findings with the results of the histological analysis. Materials and Methods: This was a retrospective, descriptive study based on a review of the medical records of 215 patients who were submitted to MRI with DWI before undergoing biopsy at a cancer center. Apparent diffusion coefficient (ADC) values were calculated for each lesion, and the result of the histological analysis was considered the gold standard. Results: The mean age was 49 years. We identified 252 lesions, 161 (63.9%) of which were found to be malignant in the histological analysis. The mean ADC value was higher for the benign lesions than for the malignant lesions (1.50 × 10-3 mm2/s vs. 0.97 × 10−3 mm2/s), the difference being statistically significant (p < 0.001). The ADC cut-off point with the greatest sensitivity and specificity on the receiver operating characteristic curve was 1.03 × 10−3 mm2/s. When the DWI and conventional MRI findings were combined, the accuracy reached 95.9%, with a sensitivity of 95.7% and a specificity of 96.4%. Conclusion: The use of DWI could facilitate the characterization of breast lesions, especially those classified as BI-RADS 4, increasing the specificity and diagnostic accuracy of MRI.

Resumo Objetivo: Avaliar o papel da sequência em difusão na avaliação de lesões mamárias suspeitas na ressonância magnética (RM), correlacionando seus achados com os resultados histológicos. Materiais e Métodos: Foi realizado estudo retrospectivo, descritivo, baseado na análise de prontuários médicos de 215 pacientes que realizaram RM com sequência em difusão e que foram submetidas a biópsia em um centro de referência oncológico. Foi calculado o valor do coeficiente de difusão aparente (ADC - apparent diffusion coefficient) para cada lesão e o resultado histológico foi considerado como padrão ouro. Resultados: A idade média das pacientes foi 49 anos. Foram identificadas 252 lesões, e destas, 161 (63,9%) eram lesões malignas na avaliação histológica. A média obtida do valor do ADC nas lesões benignas (1,50 × 10-3 mm2/s) foi superior à média das lesões malignas (0,97 × 10-3 mm2/s), com significância estatística (p < 0,001). O ponto de corte com maior sensibilidade e especificidade pela curva receiver operating characteristic foi 1,03 × 10-3 mm2/s. Com a combinação da difusão com os achados da RM, a acurácia chegou a 95,9%, com sensibilidade de 95,7% e especificidade de 96,4%. Conclusão: O uso da sequência em difusão pode auxiliar na caracterização das lesões mamárias, principalmente daquelas classificadas como BI-RADS 4, aumentando a especificidade e a acurácia diagnóstica da RM.

Intramammary sentinel lymph node with capsular extravasation in breast cancer.

Sentinel lymph node biopsy has been developed as the standard of treatment in breast cancer. Status of axillary sentinel lymph node is known to be a significant prognostic factor. Nevertheless, involvement of an intramammary lymph node with metastasis in breast cancer is a rare radiological and clinical presentation, and with extracapsular extravasation even more uncommon. Historically, reported series of patients with intramammary lymph node diagnosed by final histological examination are small in number and clinical significance of metastasis is still unclear. Here, we report a case of conservative breast cancer surgery with 3 intramammary sentinel lymph nodes containing metastasis and extracapsular extravasation. After multidisciplinary consensus, the patient was surgically reapproached with mastectomy. Even though the 3 intramammary sentinel lymph nodes were positive for metastases, pathology examination did not reveal any signs of malignancy in the mastectomy specimen.

Role of magnetic resonance imaging in the planning of breast cancer treatment strategies: comparison with conventional imaging techniques.

OBJECTIVE: To assess the role of magnetic resonance imaging (MRI) in the planning of breast cancer treatment strategies. MATERIALS AND METHODS: The study included 160 women diagnosed with breast cancer, who underwent breast MRI for preoperative staging. Using Pearson's correlation coefficient (r), we compared the size of the primary tumor, as determined by MRI, by conventional imaging (mammography and ultrasound), and in the pathological examination (gold standard). The identification of lesions not identified in previous examinations was also evaluated, as was its influence on treatment planning. RESULTS: The mean age of the patients was 52.2 years (range, 30-81 years), and the most common histological type was invasive ductal carcinoma (in 60.6% of the patients). In terms of the tumor size determined, MRI correlated better with the pathological examination than did mammography (r = 0.872 vs. 0.710) or ultrasound (r = 0.836 vs. 0.704). MRI identified additional lesions in 53 patients (33.1%), including malignant lesions in 20 (12.5%), which led to change in the therapeutic planning in 23 patients (14.4%). CONCLUSION: Breast MRI proved to be more accurate than conventional imaging in determining the dimensions of the main tumor and was able to identify lesions not identified by other methods evaluated, which altered the therapeutic planning in a significant proportion of cases.

OBJETIVO: Avaliar o papel da ressonância magnética (RM) no planejamento terapêutico de pacientes com câncer de mama. MATERIAIS E MÉTODOS: Foram avaliadas 160 mulheres com diagnóstico de câncer de mama submetidas a RM para estadiamento préoperatório. O tamanho do tumor principal avaliado pela RM e pelos exames convencionais (mamografia e ultrassonografia) foi comparado com o exame anatomopatológico (padrão ouro), utilizando o coeficiente de correlação de Pearson (r). Foi avaliada, ainda, a presença de lesões adicionais não identificadas nos exames prévios e sua influência no planejamento terapêutico. RESULTADOS: A idade média das pacientes foi 52,2 anos (variação: 30­81 anos) e o tipo histológico mais comum foi o carcinoma ductal invasivo (60,6%). A medida do tumor na RM teve melhor correlação com o tamanho no exame anatomopatológico, quando comparado com a mamografia (r: 0,872 × 0,710) e com a ultrassonografia (r: 0,836 × 0,704). A RM identificou lesões adicionais em 53 pacientes (33,1%), sendo 20 malignas (12,5%), e modificou o planejamento terapêutico em 23 pacientes (14,4%). CONCLUSÃO: A RM das mamas demonstrou ser mais acurada que os exames convencionais na avaliação das dimensões do tumor principal e foi capaz de identificar lesões adicionais não identificadas pelos outros métodos, que alteraram o planejamento terapêutico em um percentual importante dos casos.

Role of magnetic resonance imaging in the planning of breast cancer treatment strategies: comparison with conventional imaging techniques / Papel da ressonância magnética no planejamento terapêutico das pacientes com câncer de mama: comparação com exames convencionais

Abstract Objective: To assess the role of magnetic resonance imaging (MRI) in the planning of breast cancer treatment strategies. Materials and Methods: The study included 160 women diagnosed with breast cancer, who underwent breast MRI for preoperative staging. Using Pearson's correlation coefficient (r), we compared the size of the primary tumor, as determined by MRI, by conventional imaging (mammography and ultrasound), and in the pathological examination (gold standard). The identification of lesions not identified in previous examinations was also evaluated, as was its influence on treatment planning. Results: The mean age of the patients was 52.2 years (range, 30-81 years), and the most common histological type was invasive ductal carcinoma (in 60.6% of the patients). In terms of the tumor size determined, MRI correlated better with the pathological examination than did mammography (r = 0.872 vs. 0.710) or ultrasound (r = 0.836 vs. 0.704). MRI identified additional lesions in 53 patients (33.1%), including malignant lesions in 20 (12.5%), which led to change in the therapeutic planning in 23 patients (14.4%). Conclusion: Breast MRI proved to be more accurate than conventional imaging in determining the dimensions of the main tumor and was able to identify lesions not identified by other methods evaluated, which altered the therapeutic planning in a significant proportion of cases.

Resumo Objetivo: Avaliar o papel da ressonância magnética (RM) no planejamento terapêutico de pacientes com câncer de mama. Materiais e Métodos: Foram avaliadas 160 mulheres com diagnóstico de câncer de mama submetidas a RM para estadiamento préoperatório. O tamanho do tumor principal avaliado pela RM e pelos exames convencionais (mamografia e ultrassonografia) foi comparado com o exame anatomopatológico (padrão ouro), utilizando o coeficiente de correlação de Pearson (r). Foi avaliada, ainda, a presença de lesões adicionais não identificadas nos exames prévios e sua influência no planejamento terapêutico. Resultados: A idade média das pacientes foi 52,2 anos (variação: 30-81 anos) e o tipo histológico mais comum foi o carcinoma ductal invasivo (60,6%). A medida do tumor na RM teve melhor correlação com o tamanho no exame anatomopatológico, quando comparado com a mamografia (r: 0,872 × 0,710) e com a ultrassonografia (r: 0,836 × 0,704). A RM identificou lesões adicionais em 53 pacientes (33,1%), sendo 20 malignas (12,5%), e modificou o planejamento terapêutico em 23 pacientes (14,4%). Conclusão: A RM das mamas demonstrou ser mais acurada que os exames convencionais na avaliação das dimensões do tumor principal e foi capaz de identificar lesões adicionais não identificadas pelos outros métodos, que alteraram o planejamento terapêutico em um percentual importante dos casos.

Elastographic Evaluation of Indeterminate Breast Masses on Ultrasound / Avaliação pela elastografia dos nódulos mamários indeterminados na ultrassonografia

Abstract Objective To evaluate the diagnostic accuracy of elastography for breast cancer identification in patients with indeterminate lesions on ultrasound. Methods This prospective, descriptive study included patients with indeterminate breast lesions in the ultrasound and with indication for percutaneous or surgical biopsy. The elastography was evaluated by qualitative analysis and by two methods for the semi quantitative analysis. Results We evaluated 125 female patients with 159 lesions, with a mean age of 47 years, and a range of 20-85 years. Ultrasound has shown to be a method with good sensitivity (98.1%), but with a lower specificity (40.6%). On the elastography qualitative analysis, the specificity and accuracy were of 80.2% and 81.8% respectively. The mean size of the lesions showed no difference in classification by elastography. For the semiquantitative elastography, the mean values of the malignant lesions were statistically higher when compared with the subcutaneous tissue or the adjacent fibroglandular tissue. The analysis of the receiver operating characteristic (ROC) curves for these two semiquantitativemethods showed that both are considered satisfactory, with an area under the curve above 0.75 and statistical significance (p < 0.0001). The best results were obtained when using the findings of combined conventional ultrasound and qualitative elastography, with 100% sensitivity and 63.2% specificity. Conclusions Elastography can be a useful complementary method, increasing the specificity and diagnostic accuracy of conventional ultrasound for the diagnosis of breast cancer in patients with indeterminate breast lesions.

Resumo Objetivo Avaliar a acurácia diagnóstica da elastografia para identificação do câncer de mama em pacientes com lesões indeterminadas por ultrassom. Métodos Estudo prospectivo, descritivo, com pacientes com lesões mamárias indeterminadas no ultrassom e indicação de biópsia percutânea ou cirúrgica. A elastografia foi avaliada por análise qualitativa e dois métodos de análise semiquantitativa. Resultados Avaliamos 125 pacientes do sexo feminino com 159 lesões, com média de idade de 47 anos, variando de 20 a 85 anos. O ultrassom mostrou ser um método com boa sensibilidade (98,1%), mas com menor especificidade (40,6%). Na elastografia da análise qualitativa, a especificidade e acurácia foram de 80,2% e 81,8%, respectivamente. A dimensão média das lesões não mostrou diferença na classificação por elastografia. Para a elastografia semiquantitativa, os valores médios das lesões malignas foram estatisticamente maiores quando comparados ao tecido subcutâneo ou fibroglandular adjacente. A análise das curvas ROC para estes dois métodos semiquantitativosmostrou que ambos são considerados satisfatórios, com área abaixo da curva acima de 0,75 e significância estatística (p < 0,0001). Osmelhores resultados foram obtidos com os achados de ultrassonografia combinada convencional e elastografia qualitativa, com sensibilidade de 100% e especificidade de 63,2%. Conclusões A elastografia pode ser um método complementar útil, aumentando a especificidade e a precisão diagnósticas do ultrassom convencional para o diagnóstico de câncer de mama em pacientes com lesões mamárias indeterminadas.

Elastographic Evaluation of Indeterminate Breast Masses on Ultrasound.

Objective To evaluate the diagnostic accuracy of elastography for breast cancer identification in patients with indeterminate lesions on ultrasound. Methods This prospective, descriptive study included patients with indeterminate breast lesions in the ultrasound and with indication for percutaneous or surgical biopsy. The elastography was evaluated by qualitative analysis and by two methods for the semi quantitative analysis. Results We evaluated 125 female patients with 159 lesions, with a mean age of 47 years, and a range of 20-85 years. Ultrasound has shown to be a method with good sensitivity (98.1%), but with a lower specificity (40.6%). On the elastography qualitative analysis, the specificity and accuracy were of 80.2% and 81.8% respectively. The mean size of the lesions showed no difference in classification by elastography. For the semiquantitative elastography, the mean values ​​of the malignant lesions were statistically higher when compared with the subcutaneous tissue or the adjacent fibroglandular tissue. The analysis of the receiver operating characteristic (ROC) curves for these two semiquantitative methods showed that both are considered satisfactory, with an area under the curve above 0.75 and statistical significance (p < 0.0001). The best results were obtained when using the findings of combined conventional ultrasound and qualitative elastography, with 100% sensitivity and 63.2% specificity. Conclusions Elastography can be a useful complementary method, increasing the specificity and diagnostic accuracy of conventional ultrasound for the diagnosis of breast cancer in patients with indeterminate breast lesions.

Imaging features of idiopathic granulomatous mastitis - Case report.

Idiopathic granulomatous mastitis is a rare disorder of unknown etiology. This disease occurs mostly in young women and often after the lactation period. Women usually present with a fixed, painful mass, sparing the retroareolar region, associated with skin thickening and possible ulceration that mimics carcinoma. Nipple discharge can be present and bilateral involvement may occur in up to 25% of cases. In this case report, we present a typical case of histologically confirmed idiopathic granulomatous mastitis, highlighting the imaging findings, including magnetic resonance imaging (MRI), which may favor this diagnosis and enable better clinical management of these patients.

Imaging features of idiopathic granulomatous mastitis – Case report / Aspectos de imagem na mastite granulomatosa idiopática – Relato de caso

Summary Idiopathic granulomatous mastitis is a rare disorder of unknown etiology. This disease occurs mostly in young women and often after the lactation period. Women usually present with a fixed, painful mass, sparing the retroareolar region, associated with skin thickening and possible ulceration that mimics carcinoma. Nipple discharge can be present and bilateral involvement may occur in up to 25% of cases. In this case report, we present a typical case of histologically confirmed idiopathic granulomatous mastitis, highlighting the imaging findings, including magnetic resonance imaging (MRI), which may favor this diagnosis and enable better clinical management of these patients.

Resumo A mastite granulomatosa idiopática é uma afecção rara e de etiologia desconhecida. Essa doença ocorre principalmente em mulheres jovens e frequentemente após o período de lactação. As mulheres apresentam clinicamente massa endurecida, fixa, dolorosa, poupando a região retroareolar, associada a espessamento cutâneo, podendo ulcerar, simulando carcinoma. Descarga papilar pode estar presente e o envolvimento bilateral pode ocorrer em até 25% dos casos. Neste relato, apresentamos um caso típico de mastite granulomatosa idiopática, com confirmação histológica, destacando os aspectos de imagem, incluindo a ressonância magnética (RM), que possam favorecer o diagnóstico e possibilitar um melhor manejo clínico dessas pacientes.

Hyperechoic breast lesions: anatomopathological correlation and differential sonographic diagnosis.

Hyperechoic lesions are not a frequent finding at breasts ultrasonography, and most of times are associated with benign pathologies that do not require further evaluation. However, some neoplasms such as invasive breast carcinomas and metastases may present with hyperechogenicity. Thus, the knowledge about differential diagnoses and identification of signs of lesion aggressiveness are of great relevance to avoid unnecessary procedures or underdiagnosis, and to support the correct clinical/surgical approach. On the basis of such concepts, the present essay describes and illustrates the main features of hyperechoic lesions at breast ultrasonography in different cases, with anatomopathological correlation.

As lesões hiperecogênicas constituem um achado com baixa prevalência nos exames ultrassonográficos das mamas, em sua maior parte associado a doenças benignas que não necessitam de avaliação adicional. Porém, algumas neoplasias, como o carcinoma invasivo da mama e as metástases, podem apresentar-se desta forma. Assim, o conhecimento dos diagnósticos diferenciais e a identificação dos sinais de agressividade das lesões são de grande relevância, a fim de evitar procedimentos desnecessários ou o subdiagnóstico, e apoiar a conduta clínica/cirúrgica correta. Com base nestes conceitos, este artigo descreve e ilustra os principais aspectos das lesões hiperecogênicas presentes no exame ultrassonográfico das mamas, por meio de diferentes casos, e sua correlação anatomopatológica.

Lobular Carcinoma in Situ with Atypical Mass Presentation: a Case Report.

Lobular carcinoma in situ (LCIS) is associated with an increased risk of breast cancer and accounts for 1 to 2% of all breast cancers. LCIS diagnosis currently remains one of the major identifiable risk factors for subsequent breast cancer development. Imaging methods are becoming increasingly sensitive, and the consequent detection of small lesions and subtle abnormalities increases the chance of detection of in situ and invasive carcinomas, leading to a reduction in mortality. This report describes a case of a palpable complaint with abnormal imaging findings, including a solid LCIS mass.