A multivariate analysis on prognostic factors for lobular carcinoma of the breast / Uma análise multivariada de fatores prognósticos para o carcinoma lobular de mama

CONTEXT AND OBJECTIVE: Lobular carcinoma is the second most common type of breast neoplasia and has unique clinical and pathological features. Our aim was to evaluate prognostic factors for this type of breast cancer. DESIGN AND SETTING:Retrospective study at a tertiary oncological institution. METHODS: 162 patients diagnosed and treated between January 1985 and January 2002 were included. The inclusion criteria were: absence of previous treatment, histological diagnosis of lobular carcinoma, no previous history of breast cancer and minimum follow-up of 36 months. RESULTS: In univariate analysis, the following factors were statistically significant: clinical stage T (P = 0.0005), clinical stage N (P = 0.0014), neoadjuvant chemotherapy (P = 0.0008), primary tumor size (P < 0.0001), vascular invasion (P < 0.0001), lymphatic invasion (P = 0.0004), neural invasion (P = 0.0004), skin invasion (P < 0.0001), capsular transposition (P = 0.0008), lymph node ratio (P < 0.0001), estrogen receptor expression (P = 0.0186), progesterone receptor expression (P = 0.0286), pathological stage T (P < 0.0001), pathological stage N (P < 0.0001), adjuvant chemotherapy (P < 0.0001) and postoperative hormone therapy (P = 0.0367). After grouping the variables, multivariate analysis was performed. Presence of lymph node metastases, capsular transposition, lymph node ratio and postoperative hormone therapy remained significant. CONCLUSION: In this series, the most important prognostic factors for lobular carcinoma of the breast seemed to relate to lymph node status and presence of capsular transposition. Factors relating to axillary involvement, capsular transposition and hormone therapy were significant for survival.

CONTEXTO E OBJETIVO: O carcinoma lobular é o segundo tipo de neoplasia mais frequente na mama e tem características clínicas e patológicas próprias. Nosso objetivo foi avaliar fatores prognósticos para esse tipo de câncer de mama. TIPO DE ESTUDO E LOCAL: Estudo retrospectivo em instituição terciária oncológica. MÉTODOS: 162 pacientes diagnosticadas e tratadas entre janeiro de 1985 e janeiro de 2002 foram incluídas. Os critérios de inclusão foram: ausência de tratamento prévio, diagnóstico histológico de carcinoma lobular, ausência de história prévia de câncer de mama e acompanhamento mínimo de 36 meses. RESULTADOS: Em análise univariada, os seguintes fatores foram estatisticamente significativos: estágio T clínico (P = 0,0005), estágio N clínico (P = 0,0014), quimioterapia neoadjuvante (P = 0,0008), tamanho do tumor primário (P < 0,0001), invasão vascular (P < 0,0001), invasão linfática (P = 0.0004), invasão neural (P = 0,0004), invasão de pele (P < 0,0001), transposição capsular (P = 0,0008), relação linfonodal (P < 0,0001), expressão de receptor estrogênico (P = 0,0168), expressão de receptor de progesterona (P = 0,0286), estágio T patológico (P < 0,0001), estágio N patológico (P < 0,0001), quimioterapia adjuvante (P < 0,0001) e hormonioterapia pós-operatória (P = 0.0367). Agrupando-se as variáveis, realizou-se análise multivariada. Presença de metástases linfonodais, transposição capsular, razão linfonodal e hormonioterapia pós-operatória permaneceram significantes. CONCLUSÃO: Nesta série, os fatores prognósticos mais importantes para carcinoma lobular de mama parecem ser aqueles relacionados com status linfonodal e presença de transposição capsular. Fatores relacionados ao comprometimento axilar, transposição capsular e terapia hormonal foram significativos para sobrevida.

Intracystic papillary carcinoma of the breast: risks in diagnostic, staging and treatment

Intracystic papillary carcinoma (IPC) of the breast is a rare form of breast in situ carcinoma that comprises 0.5-2% of all breast tumors. IPC of the breast occurs in women around the sixth decade of life and presents an injury of great dimensions, more frequently retroareolar. Clinical and radiological findings can be confused with advanced-staged invading carcinomas (T2 or T3), leading to unnecessarily aggressive treatment. The correlation of clinical, radiological and anatomopathological findings is necessary for a correct diagnosis. We present two cases of IPC and discuss diagnostic characteristics.