Collision tumor of squamous cell carcinoma of the scalp and meningioma: A case report.

Finding 2 different histological tumor types at the same site is extremely unusual, especially in patients with no history of radiation exposure or a family history of cancer. We describe a rare case of co-occurrence of meningioma and squamous cell carcinoma at the same site. A 67-year-old woman with a 6-month headache and a verrucous ulcerative mass on her frontoparietal region is the subject of this case study. Her medical history and her family's medical history are both blank. Her bilateral frontoparietal regions were found to have large heterogeneous lesions with areas of necrosis and superficial ulceration on radiological examination. An extensive heterogeneous extra-axial lesion was discovered during further radiological analysis in the left parasagittal region. Histopathologic examination revealed an impinging tumor consisting of a meningioma and squamous cell carcinoma at the same site. It is extremely uncommon to have multiple primary scalp cancers of different cell types present at the same time. To identify these cancers and choose the best treatments, clinicians will benefit from the information in our case reports.