Preauricular Leiomyoma: A Rare Presentation of a Cutaneous Smooth Muscle Tumor.

Cutaneous leiomyoma, also known as leiomyoma cutis, is a rare presentation of an extra-uterine leiomyoma, often found on the extremities, trunk, and genitalia. Solitary lesions rarely occur on the face. This case presents a 63-year-old man with a one-year history of a growing mass in the preauricular region. On examination, a well-defined, painless mass was noted. Given the unusual yet visible location on the face, the decision was made to excise it surgically. After surgical resection, the biopsy specimen stained positively for smooth muscle actin (SMA), confirming a cutaneous leiomyoma. To the best of our knowledge, this is the eighth reported case of a preauricular cutaneous leiomyoma and stresses the importance of an accurate diagnosis for timely surgical treatment.