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[3 min read] Research review: “Ring pressure sign” in dermoscopy
Have you ever noticed a ring around a cutaneous lesion you have been observing through the dermatoscope for a long time? Have you ever wondered what it stands for?
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Ring pressure sign: When long lasting dermoscopic observation leads the decision
We recently published a paper about that, naming this phenomenon the “ring pressure sign”.
We usually take less than one second to decide whether a cutaneous lesion is benign or suspicious through dermoscopy by using the “blink approach”, but sometimes we stop upon a lesion and take more and more time to take a decision.
In that occasion, long lasting dermoscopic observation with contact dermatoscopy may produce a pressure ring on the skin around the lesion due to the “think approach”.
In our experience, whatever the expertise of the dermoscopist, the appearance of this sign may be a good individual guide for the detection of suspicious lesions.
In a few words, if we take longer to decide about a lesion, maybe it’s because it’s suspicious.
– Dr Vincenzo Piccolo
Full paper:
Piccolo V, Russo T, Argenziano G. Ring Pressure Sign: When Long Lasting Dermoscopic Observation Leads the Decision. Dermatol Pract Concept. 2021 Sep 1;11(4):e2021125. doi: 10.5826/dpc.1104a125.
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I have generally follower the 5-second rule. If you need to think about the diagnosis – benign v malignant – for 5+ seconds it needs a biopsy. Let’s not forget about ‘halo’ nevi.