Phyllodes Tumors Part 2

Clinical Presentation

Phyllodes tumors generally present as a palpable mass or, in women being screened, as an abnormal finding on imaging:

  • In one third of patients, these tumors grow rapidly and may fill a substantial portion of the breast, causing thinning of the overlying skin and prominent vascularity

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Clinical concern for a phyllodes tumor versus a fibroadenoma usually hinges on a history of rapid growth, large tumor size (> 3 cm), and / or older patient age:

  • However, with increased adoption of breast screening and breast awareness, smaller and asymptomatic lesions are being detected more often

Imaging Findings

Most phyllodes tumors appear as lobulated masses on mammography and ultrasonography:

Phyllodes tumors may, however, have irregular margins on ultrasonography, a finding seen more frequently in borderline or malignant tumors than in benign tumors

Magnetic resonance imaging (MRI) has been used to evaluate patients with phyllodes tumors, but the clinical benefit of this approach is unclear as these tumors are generally well delineated by physical examination and / or sonography, and correlation of tumor size among mammography, ultrasonography, and MRI is high

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