30-Second Takeaway
- Use nodal ultrasound or CT, not physical exam alone, when baseline staging high-risk cSCC, especially in immunocompetent patients.
- Consider early hydroxychloroquine in isolated DLE for potential 5-year cardiometabolic and ASCVD risk reduction, with standard risk-factor control.
- Reassess chronic hand eczema regimens relying on long-term systemic steroids, given high real-world costs and treatment cycling.
Week ending April 25, 2026
Practice-changing signals in dermatology: imaging for high-risk cSCC, systemic choices, and emerging mechanistic and environmental insights
Ultrasound and CT clearly outperform physical exam for baseline nodal staging in high-risk cSCC
In this multicenter paired diagnostic study of 155 patients with high-risk cSCC, 7.7% developed nodal metastases within three months post-surgery. Baseline ultrasonography provided the highest sensitivity for nodal metastasis detection, outperforming CT and especially physical examination, while maintaining high specificity. In immunocompetent patients, both ultrasound and CT achieved 100% sensitivity with excellent AUROCs, suggesting reliable early detection when nodes are radiographically evident. Among immunosuppressed patients, sensitivity of both modalities declined markedly, with metastases often emerging abruptly despite negative baseline imaging.
Hydroxychloroquine use in isolated DLE links to lower 5-year cardiometabolic and ASCVD risk
This retrospective single-center and TriNetX cohort analysis evaluated hydroxychloroquine in adults with isolated discoid lupus erythematosus. Across 106 single-center patients and 2,260 matched TriNetX pairs, hydroxychloroquine use was associated with lower 5-year cardiometabolic and cardiovascular events. Users had reduced odds or risks of hyperlipidemia, hypertension, diabetes, peripheral arterial disease, angina, coronary artery disease, and stroke. Benefits appeared independent of DLE extent, but residual confounding, coding inaccuracies, and lack of disease-activity data limit causal inference.
ECM-driven melanocyte dedifferentiation emerges as a reversible, targetable mechanism in vitiligo
This mechanistic study found that vitiligo skin exhibits extracellular matrix remodeling with loss of laminin-211 and gain of laminin-332. Melanocyte adhesion shifts from dystroglycan–laminin-211 to integrin α3β1–laminin-332, promoting a dedifferentiated, neural crest-like, hypopigmented state. These dedifferentiation changes involved Rho–F-actin remodeling and coordinated alterations in Hippo, MAPK, and c-Jun signaling pathways. Pharmacologic modulation, including JAK inhibition, partially restored melanocyte differentiation and pigmentation in mouse models and ex vivo human skin.
References
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Additional Reads
Optional additional studies from this edition.