Case 1	Case 2	Case 3	Case 4
Sex	Female	Female	Female	Female
Previous autoimmune disease	Raynaud’s disease, Jaccoud’s arthropathy	None	Autoimmune thyroiditis	None
Diagnosis of Kikuchi-Fujimoto disease
Year	1990	2002	2008	2010
Age at KFD diagnosis	40 years	24 years	13 years	18 years
Lymph-node site	Axillary, inguinal	Laterocervical	Supraclavicular	Laterocervical
ANA	Negative	Positive	Positive	Negative
Anti-DNA	Negative	Negative	Negative	Negative
Concomitant autoimmune disesase	None	Idiopathic Thrombo-cytopenic Purpura	None	None
Diagnosis method	Lymph-node biopsy	Lymph-node biopsy	Lymph-node biopsy	Lymph-node biopsy
KFD recurrence	No	Yes	Yes	Yes
Clinical course
Autoimmunity findings	Pleuropericarditis, lymphopenia	Oral thrush, chilblain, lymphopenia	–	–
Serological markers	ANA+, Anti-DNA+, Anti-phospholipid+	ANA+, Anti-DNA+	–	–
Diagnosis of SLE
Year	1992	2006	–	–
Age at the time of SLE diagnosis	42 years	28 years	–	–