Incidentally Detected McCleery Syndrome during Handheld Breast Ultrasound.

Background: The goal of our study is to identify the prevalence of McCleery syndrome and categorize its clinical manifestations in patients who obtained a diagnostic breast ultrasonography at our clinic.

Methods: Five thousand four hundred and twenty cases were reviewed in our clinic for diagnostic breast imaging between May 2021 and May 2022. Five thousand three hundred and two of the cases were female, while 118 were male. Duplex Doppler scanning was used to assess the subclavian vein and the axillary venous structures. The same radiologist performed all examinations; in cases where suspicion was warranted, a second radiologist's opinion was acquired. The diagnosis was confirmed by consensus.

Results: In 52 cases, McCleery syndrome was identified. Between the ages of 36 and 54 years, the average age was 47 years. In four of the patients, magnetic resonance venography supported the diagnosis. In most cases, McCleery syndrome was unilateral. In only two cases was it bilateral. The incidence of McCleery syndrome was 0.95% in our study. Pain was the most often reported symptom (53.8% of 28 cases). No symptoms were reported in 26.9% of the patients.

Conclusion: During a breast ultrasound, radiologists should be aware of McCleery syndrome while assessing the axilla.