Entrapment neuropathy of common peroneal nerve by fabella: A case report

Table 3 Reported cases of neuropathy of the common peroneal nerve due to compression by the fabella

Ref.	Age	Gender	Symptom	Tinel sign	Fabella size	NCV	EMG	Treatment	Outcome
This case	46	Female	Inverted foot with evertors atrophy	+	25 mm × 19 mm × 27 mm	Conduction block	AD and R-MUAP in PL, PB	Surgery	Partially resolved
Mangieri[7]	46	Female	Sensory impairment	+	22 mm × 14 mm	Focal slowing	Normal	Surgery	Completely resolved
Takebe and Hirohata[6]	49	Male	Drop foot with sensory impairment	+	9 mm × 7 mm × 6 mm	Focal slowing	AD and R-MUAP in TA, PL	Surgery	Slight functional disturbance
	34	Male	Drop foot with sensory impairment	+	11 mm × 9 mm × 7 mm	Focal slowing	AD and R-MUAP in TA, PL	Surgery	Completely resolved
	36	Male	Drop foot with sensory impairment	-	10 mm × 10 mm × 8 mm	Focal slowing	AD, R-MUAP and polyphasia in TA, PL	Surgery	Completely resolved
	53	Male	Drop foot with sensory	-	11 mm × 11 mm × 8 mm	Conduction block	R-MUAP in TA, PL	Conservative	Satisfactory improvement
	40	Male	Drop foot with sensory impairment	+	8 mm × 8 mm × 6 mm	Focal slowing	AD in PL, R-MUAP in TA, PL	Conservative	Completely resolved
	22	Male	Drop foot with sensory impairment	-	9 mm × 9 mm × 7 mm	Focal slowing	R-MUAP in TA, PL	Conservative	Completely resolved
	25	Male	Drop foot with sensory impairment	-	7 mm × 5 mm × 4 mm	Focal slowing	AD in TA	Conservative	Satisfactory improvement
Patel et al[3]	67	Male	Drop foot with sensory impairment	-	23 mm × 20 mm	Focal slowing	Normal	Surgery	Completely resolved
Lee et al[8]	79	Female	Drop foot with sensory impairment	+	16 mm × 20 mm × 15 mm	Conduction block	AD in TA	Surgery	Completely resolved
Kubota et al[9]	50	Female	Drop foot with sensory	-	5 mm × 5 mm	Focal slowing	AD in TA, PL, EDL	Conservative	Partially resolved

Sensory impairment indicating sensory disturbance of anterolateral region of the lower leg and dorsal region of the foot; focal slowing of conduction velocity and conduction block indicating NCV test results across fibular neck; Surgery indicating resection of fabella and neurolysis of common peroneal nerve. AD: Active denervation; R-MUAP: Reduced motor unit action potential; TA: Tibialis anterior; PL: Peroneus longus; PB: Peroneus brevis; EDL: Extensor digitorum longus.