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Interval Breast Cancer: What a 6.5-Million–Mammogram Study Teaches Us About Missed Opportunities in Screening

  Interval Breast Cancer (IBC) remains one of the most important quality markers in breast cancer screening programs. These are cancers diagnosed  after a negative screening mammogram but before the next scheduled screen —and they represent the uncomfortable gray zone between biology, technology, and human interpretation. A recent large-scale study from Taiwan, analyzing  6.5 million screening mammograms  in  2.88 million women , provides one of the most comprehensive insights into  why interval cancers happen and how we can reduce them . 1. Dense Breasts: Still the Biggest Blind Spot The study confirms the firm association between breast density and the risk of IBC: Extremely dense breasts (BI-RADS D): IBC risk = 1.15 per 1000 person-years Fatty breasts (BI-RADS A): IBC risk = 0.29 per 1000 person-years That’s nearly a  4X increase . Dense breast tissue not only hides cancers but is also biologically more prone to aggressive tumors. For clinicians, th...

PD-MRA vs HR-MRA: A Game-Changer for Indeterminate Intracranial Aneurysms?

  Indeterminate intracranial aneurysms  are one of the most frustrating gray zones we face in neurovascular imaging. A small bulge at the PCom origin, a questionable ACom prominence, or an ICA outpouching that “could be” an infundibulum—these findings often push clinicians toward invasive angiography purely to clarify anatomy. A recent study comparing  Proton-Density MRA (PD-MRA)  with high-resolution  Time-of-Flight MRA (HR-MRA) brings a major shift: ➡️  PD-MRA dramatically outperforms HR-MRA  in diagnosing aneurysms among indeterminate lesions. ➡️ Offers  near-perfect interobserver agreement . ➡️ May  reduce the need for DSA  in many borderline cases. This blog breaks down the study highlights into simple, clinically useful points. Why This Study Matters In day-to-day reporting: 3–5 mm (or smaller) vascular bulges are  frequently indeterminate  on CTA/MRA. Up to  18% of lesions  on standard MRA fall into this ambigu...

Enhanced Myometrial Vascularity (EMV): The Most Misunderstood Doppler Finding After Pregnancy Loss

  Enhanced Myometrial Vascularity (EMV)  is one of the most striking and often misunderstood sonographic findings encountered after miscarriage, medical termination, or delivery. For years, many clinicians labelled it as  uterine arteriovenous malformation (AVM)  — a diagnosis that carries heavy implications and often leads to unnecessary interventions such as uterine artery embolization. A recent expert review by Dewilde et al. (2023) clarifies the confusion and emphasizes that  EMV is not an AVM  — and recognizing this distinction is crucial for safe, evidence-based management. What Exactly Is EMV? EMV refers to  dilated, tortuous, high-velocity, low-resistance myometrial vessels  seen on Doppler imaging beneath  retained pregnancy tissue . It is  a physiological, temporary, pregnancy-related vascular change , not a congenital malformation. It arises because the  placental bed vessels remain open and high-flow  as long as any...