ABSTRACT
Keratoacanthomas (KAs) originally considered benign tumour, but some researchers believe that KA is a borderline tumor or a subtype of squamous cell carcinoma. Few distant metastasis of Kas has been reported. A 42-year-old woman presented with a 1.8 x 1.8 cm keratoacanthoma (KA) of the nose tip. After 1 month of her radiotherapy, two neoplasms of KA developed from the bridge of the nose, 1cm and 3.4 cm away from the primary focus. To the best of our knowledge, no case of adjacent tissue skip metastasis of KA on the nose tip have been reported to date.
Keywords: Case report; Metastasis; Keratoacanthomas; Superficial X-ray therapy