A case of Waldenström macroglobulinemia with nephrotic syndrome is reported. Kidney biopsy, revealing only foot process fusion and response to steroid therapy, fits minimal change disease.

Collision tumours are a random association of two or more neoplasms arising in the same anatomical site. Dilated pore of Winer (DPW)an adnexal tumour of pilar originhas been described in collisions with basal cell carcinoma (BCC), squamous cell carcinoma (SCC) and trichoblastoma. We present a literature review of melanoma-associated skin lesions and describe the first collision of a DPW with a melanoma in situ (MIS) and the sequential dermoscopic examination for diagnosis.

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