SGc accounts for approximately 0.7% of all skin cancers and 0.2 to 4.6% of all malignant cutaneous neoplasms. Notable risk factors include age, gender, and race. Over 98% of SGc occur in patients over the age of 40. The mean age of diagnosis for periocular and extraocular SGc is around 67 years. Periocular SGc tends to be more common in women, while extraocular SGc tends to be more common in men. SGc is extraordinarily rare in children with only a few cases reported. There is a higher incidence of SGc in Caucasians, Asians, and Indians. While SGc affects Caucasians over 80% of the time, SGc tends to be more prevalent in the Eastern versus Western Hemisphere, contributing to 33% of eyelid malignancies in China versus 1-5.5% in Caucasians. The higher incidence of SGc in Asian populations may be due to the lower incidence of other eyelid tumors or genetic.
Sebaceous carcinoma
Medulloepithelioma
Lymphoepithelioma
Bartholin gland carcinoma
Basal-cell carcinoma
Trichoepithelioma
Pyogenic granuloma
Angiokeratoma