Misdiagnosis of sebaceous carcinoma.

Background: Sebaceous carcinoma is an aggressive malignant tumour. To prevent mutilating surgery and improve patient outcomes, early diagnosis and prompt treatment are necessary. When the tumour invades surrounding tissues, treatment may become complex.
Methods: We present a case report illustrating complex resection and reconstruction of a sebaceous carcinoma after initial misdiagnosis.
Results: A 74-year-old man with a sebaceous carcinoma to his right upper eyelid had a delay in treatment due to initial misdiagnosis. Upon the correct diagnosis, computed tomography scan showed tumour invasion of the medial rectus muscle and tumour spread to the right parotid gland. An orbital exenteration, partial parotidectomy and selective cervical lymphadenectomy were performed. Frozen section examination showed false-free margins, as additional paraffin embedded sections showed uncomplete tumour resection. Adjuvant radiotherapy was offered to the patient. The treatment was complicated by radio necrosis, necessitating surgical reconstruction by a paramedian forehead flap. Final reconstruction of the right orbit was accomplished by a personalised epithesis.
Conclusions: Sebaceous carcinoma is a tumour that is often misdiagnosed. The aim of this case report is to emphasize the possible consequences of its misdiagnosis. An overview of characteristic clinical findings is provided to help reduce the number of misdiagnoses.