BACKGROUND
Keratoacanthoma (KA) is a common skin tumour in dermatology. It manifests as a rapidly growing, well-differentiated, squamoid lesion with a predilection for sun-exposed sites in the elderly1. KA is composed of keratin-plugged, cutaneous, crater-shaped nodules that arise spontaneously. Some KAs tend to spontaneously involute, and they may grow to a size of 1–2 cm before involuting2. However, owing to their tendency for regression, KAs have been categorized as biologically benign tumours with distinct pathophysiological mechanisms from those of malignant cSCC1. Thus, rare cases of distant metastasis purported to originate from KA can be found in the literature1. Here, we have reported the case of adjacent tissue skip metastasis of KA on the nose.