Table 1.

Summary of literature on dermatological paraneoplastic syndromes in cholangiocarcinoma

Ref.	Year	Paraneoplastic syndrome	Mediator
Dermatologic
Ravnborg et al[15]	1993	Acanthosis nigricans	TGF-alpha
Suchonwanit et al[19]	2018	Alopecia	T-lymphocytes
Antoniou et al[20]	2012	Alopecia	T-lymphocytes
Suh et al[23]	2016	Dermatomyositis
Yasuda et al[26]	2018	Dermatomyositis
Sotoodian et al[27]	2018	Disseminated superficial porokeratosis	p53
Cannavó et al[29]	2008	Disseminated superficial porokeratosis	p53
Chiyomaru et al[33]	2010	Necrolytic migratory erythema
Tzovaras et al[36]	2007	Persistent erythema multiforme
Shinojima et al[39]	2006	Sweet syndrome	G-CSF, IL-1, IL-6
Karabulut et al[43]	2006	Bazex syndrome
Liau et al[47]	2016	Erythema gyratum
Bar-Ilan et al[48]	2017	Pityriasis rubra pilaris
Morgenthau et al[51]	2019	Sign of leser- trelat	EGF-alpha
Opneja et al[53]	2015	Subacute cutaneous lupus erythematosus

TGF-alpha: Tissue growth factor-alpha; G-CSF: Granulocyte-colony stimulating factor; IL: Interleukin; EGF-alpha: Epidermal growth factor-alpha.