Effect of a single injection of autologous conditioned serum (ACS) on tendon healing in equine naturally occurring tendinopathies

Table 1 Description, clinical history, diagnostic data, and treatment of 15 horses with 17 SDFT lesions

Horse number	Breed	Age (years)	Gender	For which purpose used	Reported duration of SDFT tendinopathy until initial examination (days)	Reported initiating event	Limb affected	Maximal injury zone	Lesion type	Treatment
ACS group
2241/09	Thoroughbred	2	S	Racing	2	Training	RF	2b	Diffuse	ACS
2240/09	Thoroughbred	3	S	Racing	2–3	Training	RF	2b	Core	ACS
2489/09^a	Thoroughbred	4	M	Racing	7	Racing	RF	1b	Core	ACS
2539/09	Warmblood	3	S	Dressage	14	Blunt trauma	RF	2b	Marginal	ACS
1672/10	Arabian	17	G	Pleasure	14	Running free	RF	1b	Core	ACS
6264/10^b	Warmblood	8	G	Dressage	9	Unknown	RF	3a	Marginal	ACS
6335/10	Warmblood	10	G	Pleasure	10	Unknown	LF	2b	Diffuse	ACS
4793/10	Thoroughbred	3	S	Racing	7	Training	LF	2b	Core	ACS
6263/10	Warmblood	20	M	Pleasure	14	Stumbling at cross country ride	RF	1b	Core	ACS
2378/10	Warmblood	11	M	Pleasure	13	At ride	LF	2b	Diffuse	ACS
		Mean 8.1
Controls
2489/09^a	Thoroughbred	4	M	Racing	7	Racing	LF	1b	Diffuse	No
6264/10^b	Warmblood	8	G	Dressage	9	Unknown	LF	2a	Core	Saline
6111/10	Warmblood	5	M	Jumping	14	Kicking himself over the jump	RF	1b	Marginal	No
6265/10	Warmblood	5	M	Pleasure	7	Unknown	RF	1b	Marginal	Saline
6383/11	Warmblood	18	M	Pleasure	10	At cross country ride	LF	2a	Marginal	No
5461/11	Warmblood	14	G	Police horse	4	At gallop on beach	LF	2b	Diffuse	No
6384/11	Half-blood	8	G	Eventing	1	After eventing competition	LF	2a	Core	No
		Mean 8.86

^{a, b}Horses had bilateral SDFT lesions and served for the ACS group and as control. ACS autologous conditioned serum (treated with single intralesional injection of autologous conditioned serum); G gelding, LF left front limb, M mare, RF right front limb, S stallion, Saline treated with single intralesional saline injection, SDFT superficial digital flexor tendon