Latar Belakang: USG payudara dan mamografi secara luas digunakan sebagai modalitas diagnostik yang efektif untuk mengevaluasi kelainan payudara. Derajat keganasan histopatologis berperan penting dalammanajemen karsinoma payudara. Ketersediaan pemeriksaan histopatologis yang terbatas dan sebaran pemeriksaan USG dan mamografi yang lebih luas diharapkan dapat membantu klinisi dalam menentukan penatalaksanaan karsinoma payudara lebih dini. Tujuan penelitian ini adalah meningkatkan nilaimamografi serta USG payudara dengan mengetahui keterkaitan temuan morfologis lesi berdasarkan USG payudara dan mamogram yang dapat mengidentifikasi derajat keganasan histopatologis karsinoma payudara. Metode: Studi retrospektif ini melibatkan subyek dengan karsinoma payudara primer yangmenjalani USG dan mamografi serta belum menjalani prosedur apapun. Temuan USG dan mamogram dianalisis dan dikorelasikan dengan derajat keganasan histopatologis. Variabel dianalisis menggunakan uji chi-square dan Kolmogorov-Smirnov. Hasil: Diperoleh 174 subyek karsinoma payudara. Usia rerata subyek 52 tahun. Ukuran massa <5 cm paling banyak ditemukan (61,1%) dan memiliki hubungan yang signifikan dengan derajat keganasan histopatologis (p<.05). Batas lesi, ekhogenisitas lesi dan kalsifikasilesi pada USG (p <.05) berhubungan dengan derajat keganasan histopatologis. Sedangkan untuk bentuk lesi, bentuk irregular lebih banyak ditemukan dibandingkan lesi lain dengan distribusi yang hampir sama antara derajat 1, 2, dan 3. Proporsi batas lesi paling banyak di derajat 3 yakni batas tidak tegas.Ekhogenisitas heterogen lebih sering ditemukan pada tumor derajat 2 dan lesi hipoekhoik lebih banyak ditemukan pada tumor derajat 3. Saat dilakukan analisis tambahan dengan membagi derajat keganasan menjadi 2 grup (derajat rendah dan derajat tinggi), batas dan orientasi lesi pada USG (p <.05) berhubungan dengan derajat keganasan histopatologis sedangkan kalsifikasi lesi dan ekhogenisitas lesi tidak berhubungan. Tidak ada hubungan antara karakteristik lesi pada mamogram (densitas payudara, bentuk,batas, densitas lesi, dan kalsifikasi) dengan derajat keganasan histopatologis (nilai p > 0,05). Proporsi batas spikulasi lebih banyak ditemukan pada lesi derajat rendah. Simpulan: Orientasi pararel lebih banyakditemukan pada tumor derajat tinggi. Batas tidak tegas paling banyak ditemui di kedua kelompok derajat keganasan namun proporsi lebih banyak ditemukan pada lesi derajat tinggi. Tidak ditemukan hubungan signifikan antara morfologis lesi pada mamogram dengan derajat keganasan.

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Background: Breast ultrasonography (USG) and mammography are widely used as effective diagnostic modalities to evaluate breast abnormalities. Histological grade plays big role in management of breast

carcinoma. The purpose of this study was to increase the value of mammography and ultrasound. Also, knowing which features on ultrasound and mammogram that can predict histological grade. The limited

availability of histopathological examinations and better access of ultrasound and mammography can assist clinicians in management of breast carcinoma. Method: A retrospective study was conducted by

reviewing imaging of women with breast cancer who had not undergone any procerdure. Mammogram and US findings were analyzed in compliance with operational definition and later compared with histopathological data. All variables were analyzed using chi-square and Kolmogorov-Smirnof. Result:

Mean age at diagnosis of breast cancer was 52 years. Tumor size <5 cm was the most common (61.1%) and had significant relation with tumor grade (p<.05). In terms of ultrasound findings, the only differential

findings between ultrasound findings and histopathological grade were margin, echogenicity, and calcifications (p < .05). As for the shape of the lesions, an irregular shape was more observed compared to other lesions with almost equal distribution between grade 1, 2, and 3. Heterogene echogenicity was more frequently found on grade 2 and hypoechoic lesions were more common in grade 3 tumor. When additional analysis was carried out by dividing the histological grade into 2 groups (low grade and high grade), margin and orientation on the ultrasound (p <.05) had relation to tumor grade while the

calcification of the lesion and the echigenicity were not related. No significant difference between mammogram features (breast density, shape, margin, lesion density, and calcifications) and tumor grade

(p>.05). The proportion of spiculated margin in mamogram is more common in low-grade lesions. No significant association between ultrasound features (shape, echogenicity, posterior pattern, and calcifications) with histological grade. Conclusion: Margin and orientation of the lesion on ultrasound have a relationship with histological grade. Parallel orientation is more common seen in high-grade

tumors. Indistinct borders were commonly found in both groups; however, a higher proportion was found

in high-grade lesions. No significant relation was found between mammogram features and tumor grade