Table 1.

Sources of human keloid and normal skin tissues

Keloid tissues						Normal skin tissues
Age (years)	Sex	Cause	Location	Duration	Treatment history	Age (years)	Sex	Location
27	M	Acne	Back	1 year	Untreated	29	M	Abdomen
55	F	Surgery	Chest	5 years	Untreated	47	F	Lower limb
27	F	Surgery	Neck	1 year	Silicone	50	M	Abdomen
19	F	Ear piercing	Earlobe	10 months	Untreated	46	F	Head
28	M	Surgery	Chest	1 year	Silicone	52	F	Lower limb
20	M	Surgery	Abdomen	1 year	Untreated	18	F	Abdomen
39	F	Surgery	Abdomen	1 year	Untreated	66	M	Head
24	F	Ear piercing	Earlobe	18 months	Untreated	35	F	Abdomen
40	M	Surgery	Shoulder	18 months	Untreated	56	F	Lower limb
23	F	Acne	Back	2 years	Untreated	65	F	Abdomen
26	M	Insect bite	Chest	2 years	Untreated	53	F	Back
30	F	Unclear	Chest	1 year	Untreated	29	M	Lower limb
35	M	Trauma	Arm	18 months	Untreated	58	M	Abdomen
22	F	Ear piercing	Earlobe	6 months	Untreated	37	F	Abdomen
42	F	Surgery	Abdomen	20 months	Silicone	66	F	Head
18	F	Ear piercing	Earlobe	8 months	Untreated	65	M	Head
19	F	Unclear	Chest	1 year	Untreated	61	M	Abdomen
44	M	Burns	Chest	18 months	Silicone	33	M	Chest
56	M	Trauma	Chest	5 years	Untreated	28	F	Lower limb
60	F	Unclear	Chest	3 years	Untreated	59	M	Head

Abbreviations: F, female; M, male.