Cutaneous adenosquamous carcinoma: a rare neoplasm with biphasic differentiation

Cutaneous adenosquamous carcinoma (cASC) is an extremely rare malignant neoplasm. Due to its disputed pathophysiology, ambiguity of presentation, and lack of definitive clinical research, cASC is a commonly misdiagnosed skin lesion. Although it is not commonly encountered in clinical practice, it is essential for clinicians to correctly recognize and treat cASC because of its malignant and recurrent nature. The images provided in this case report depict classic and complete presentation of cASC. A review of the literature also was conducted to provide insight into this rare atypical lesion.