Table 1.

Previously reported cases of proximal upper extremity cervical flexion myelopathy

First author [Ref.], year	Sex	Age at on-set, years	Age at diagnosis, years	Muscle weakness	Level of cervical cord compression	Treatment	Prognosis
Masaki [4], 1990	Male	18	24	Bilateral deltoid, right biceps brachii	C4/C5	Operation	Improved
Ando [5], 1993	Male	16	16	Right deltoid, biceps brachii, brachioradialis	C4/C5	Observation	Improved
Yaguchi [6], 2007	Male	16	23	Right triceps, serratus anterior	C4/C5	Observation	No progression
Jung [7], 2013	Male	18	19	Right biceps brachii	C4/C5	Neck collar	No progression
Paeng [8], 2015	Male	18	19	Right biceps brachii	C4/C5	Neck collar	No progression
This report, 2018	Male	18	18	Bilateral deltoid, supraspinatus, infraspinatus, biceps brachii	C4/C5	Neck collar	Improved