Table 1.

Case reports of bilateral femoral neck insufficiency fractures.

Author	Sex	Age (years)	Pathogenesis	Fracture classification	Treatment
Gupta[9]	Female	10	Vitamin D deficiency	Bilateral displaced fracture	L: valgus intertrochanteric osteotomy
					R: internal fixation with cannulated screw
Kalaci[10]	Female	18	Osteoporosis	Bilateral nondisplaced fracture (tension side)	Bilateral internal fixation with cannulated screw
Kerim[11]	Female	26	Vitamin D deficiency	Bilateral nondisplaced fracture (compression side)	L: DHS
					R: DHS
Santiago[12]	Female	27	Vitamin D deficiency	Bilateral nondisplaced fracture (compression side)	L: DHS
					R: DHS
Jacques[13]	Female	38	Osteoporosis and anorexia nervosa	Bilateral nondisplaced fracture (compression side)	L: DHS
					R: DHS
Tomofumi[14]	Female	41	Osteoporosis and vitamin D deficiency	Bilateral nondisplaced fracture	L: DHS
					R: DHS
Sivas[15]	Female	42	Osteomalacia	R: nondisplaced fracture (compression side)	Expectant treatment
				L: nondisplaced fracture
Joseph[16]	Female	46	Osteoporosis and steroid use	Bilateral nondisplaced fracture (compression side)	L: DHS
					R: DHS
Haddad[17]	Female	56	Steroid use	L: displaced fracture	Bilateral internal fixation with cannulated screw
				R: nondisplaced fracture
Tomar[18]	Female	58	Vitamin D deficiency	L: nondisplaced fracture (compression side)	L: THA
				R: nondisplaced fracture (tension side)	R: THA
Martin[19]	Female	65	Osteoporosis	R: displaced fracture	R: hemiarthroplasty
Chamseddine[20]	Female	71	Osteoporosis and vitamin D deficiency	L: displaced fracture	L: hemiarthroplasty
				R: nondisplaced fracture	R: Hemiarthroplasty
Sathyanarayana[21]	Male	23	Renal osteopathy	Bilateral displaced fracture	L: hemiarthroplasty
					R: hemiarthroplasty
Mariani[22]	Male	24	Vitamin D deficiency	Bilateral displaced fracture	L: THA
					R: THA
Chouhan[23]	Male	32	Osteoporosis and connective tissue tumor	Bilateral nondisplaced fracture (compression side)	Bilateral expectant treatment after tumor resection
Saisunder[5]	Male	35	ART treatment	L: displaced fracture	L: DHS
				R: nondisplaced fracture (compression side)	R: expectant treatment
Nagao[24]	Male	36	Osteoporosis and vitamin D deficiency	Bilateral displaced fracture	Bilateral hemiarthroplasty
Kiyokazu[25]	Male	51	Vitamin D deficiency and osteoporosis	Bilateral nondisplaced fracture (compression side)	Bilateral internal fixation with cannulated screw
Narra[26]	Male	52	Osteoporosis and HAART treatment	Bilateral displaced fracture	L: hemiarthroplasty
					R: expectant treatment
Tan[27]	Male	55	Osteoporosis	Bilateral displaced fracture	L: THA
					R: internal fixation with cannulated screw

DHS = dynamic hip screw, L = left side, R = right side, THA = total hip arthroplasty.