The etiology of<unk>  is unknown. It is likely directly induced by an underlying neoplasm secreting a growth factor. One candidate may be alpha-transforming growth factor, structurally related to epidermal growth factor, but antigenically distinct from it. The underlying cancer is most often gastric adenocarcinoma but also with breast cancer, bladder cancer, hepatobiliary cancer, ovarian cancer, uterine cancer, prostate cancer, lung cancer and cervical cancer. Other associated underlying malignancies include squamous cell carcinomas and lymphomas.
Florid cutaneous papillomatosis
Hydroa vacciniforme
Stasis papillomatosis
Keratosis pilaris atrophicans
Granuloma annulare
Diabetic dermadrome
Generalized granuloma annulare
Vitiligo