1000 Basal-Squamous Cell Carcinoma Collision Tumour Of the Preauricular Region

Abstract Collision tumours are defined as multiple neoplasms adjacent to each other or combined in one area and particularly rare, with only basal-squamous cell carcinoma combination of the head neck region published literature. Case description An 87-year-old farmer presented Maxillofacial Surgery department following referral by his general practitioner concerned suspected skin neoplasms. Four lesions were identified, two which required surgical excision 4mm margins. Following histological investigation, lesion right preauricular was identified a collision tumour completely excised clear Discussion This case highlights possibility single site gives an insight into management while aiming increase clinician awareness especially high-risk sites such neck. suggests that 4-5mm margin may be sufficient removing similar presentations however importance appropriate examination specimens not correctly diagnose but ensure margins mitigate recurrence risk. It must noted systemic metastases more common squamous than basal cases therefore it is possible have higher rates traditional carcinomas.