Is three-dimensional–printed custom-made ultra-short stem with a porous structure an acceptable reconstructive alternative in peri-knee metaphysis for the tumorous bone defect?

Table 1 The demographics of the fifteen patients who received reconstruction with endoprosthesis with three-dimensional–printed custom-made ultra-short porous stem in peri-knee metaphysis

	Age (year)	Gender	Diagnosis	Tumor location	Enneking staging [41]	Neo-adjuvant chemotherapy	Follow-up (month)	Oncologic outcome	Complications	MSTS-93 score	Knee ROM (°)
Patient
1	27	F	Ewing sarcoma	Femur, D	IIB	Two circles	42	NED	PPF	30	140
2	61	M	Chondrosarcoma	Femur, P	IIB	No	39	NED		25	110
3	50	M	Chondrosarcoma	Femur, P	IIB	No	50	NED		24	100
4	11	F	Osteosarcoma	Femur, D	IIB	Two circles	48	NED		27	130
5	57	F	MLC	Femur, D	NA	No	36	AWD		27	120
6	30	F	Osteosarcoma	Femur, P	IIB	Two circles	43	NED		24	120
7	14	M	Osteosarcoma	Femur, P	IIB	Two circles	45	NED		25	110
8	45	M	POS	Femur, D	IIB	No	40	NED		28	120
9	13	M	Osteosarcoma	Tibia, D	IIB	Two circles	41	NED	PPF+EAL	29	120
10	19	F	Ewing sarcoma	Tibia, D	IIB	Two circles	34	NED		30	140
11	22	F	Osteosarcoma	Tibia, D	IIB	Two circles	54	NED		23	110
12	38	F	Osteosarcoma	Tibia, D	IIB	Two circles	48	NED		28	130
13	16	F	Osteosarcoma	Tibia, D	IIB	Two circles	37	NED		26	120
14	12	M	Ewing sarcoma	Tibia, D	IIB	Two circles	43	NED		26	120
15	15	F	Osteosarcoma	Tibia, D	IIB	Two circles	42	NED		25	110
Median	22						42			26	120

MLC, metastatic lung cancer; POS, periosteal osteosarcoma; P, proximal; D, diaphysis; NA, not applicable; NED, no evidence of disease; AWD, alive with disease; PPF, periprosthetic fracture; EAL, early aseptic loosening; MSTS, musculoskeletal tumor society; ROM, range of motion.

ISSN: 1477-7819