4.2 Pathology
The diagnosis of ACC is usually made only by clinical examination. Because many patients refuse to undergo local biopsy and cannot be diagnosed pathologically, the diagnosis can only be made based on the patient’s age, demographics, and typical scalp involvement. The two children in this article refused the pathological examination. This disease’s pathological presentation in the literature is as follows: histopathological manifestations of non-healing lesions include epidermal and dermal loss and vascular proliferation. Scar tissue formed at the top of the patient is healed head defect shows a thin or flattened layer of the epidermis but no attachment structures.