Age‑Appropriate Imaging Evaluation of Mastalgia (American College of Radiology)

Clinical Assessment

Stratify mastalgia by pain pattern and patient age; most women require only reassurance after malignancy is excluded, while focal non‑cyclical pain mandates age‑appropriate imaging per ACR guidelines. 1
Cyclical mastalgia – diffuse, bilateral, pre‑menstrual pain involving more than one quadrant – is physiologic and does not require imaging beyond routine breast‑cancer screening. 1, 2
Focal non‑cyclical mastalgia – localized, unilateral, persistent pain – warrants imaging to rule out cancer; the underlying malignancy risk is low (≈ < 2%). 1

Women < 30 years: Initiate with breast ultrasound as the first‑line modality. Evidence level: strong consensus in ACR criteria. 1, 2
Women 30–39 years: Either diagnostic mammography (including digital breast tomosynthesis) or ultrasound are considered equivalent first‑line options. Evidence level: strong consensus. 1, 3
Women ≥ 40 years: Diagnostic mammography/digital breast tomosynthesis is appropriate, with ultrasound used as a complementary study when needed. Evidence level: strong consensus. 1, 4
Recent recent mammogram (within 3–6 months): Proceed directly to targeted ultrasound without repeat mammography. Evidence level: strong consensus. 1, 4

Mammography shows 100 % sensitivity and 100 % negative predictive value for excluding malignancy in patients presenting with focal breast pain. Evidence level: high (based on ACR data). 4
Ultrasound specificity is ≈ 95 % in nondense breasts and ≈ 87 % in dense breasts. Evidence level: moderate‑high (ACR data). 3
The majority of imaging findings in this context are benign lesions (e.g., small cysts, benign masses) that rarely require invasive intervention. Evidence level: moderate (ACR observations). 1, 3

Avoid imaging cyclical, diffuse breast pain – unnecessary radiation exposure, false‑positive results, and increased patient anxiety occur without demonstrable benefit. Evidence level: strong consensus. 1, 2
Do not automatically aspirate small cysts detected on ultrasound when there is no palpable abnormality; such cysts are unlikely to be the pain source and aspiration offers no proven advantage. Evidence level: moderate‑high (ACR guidance). 1, 3

Refer to a breast‑care specialist when imaging uncovers suspicious abnormalities that require tissue diagnosis (biopsy). Evidence level: strong consensus. 1