Degenerative intraspinal cyst
The cervical spine is a relatively rare location for a degenerative intraspinal cyst compared to the lumbar spine 1).
see Ganglion cyst.
1)
Sharma S, Vaishya S, Ahlawat S, Gupta RK. Intraspinal Degenerative Cyst
Causing Compression Of The Cervico-Medullary Junction. World Neurosurg. 2019 Jun
26. pii: S1878-8750(19)31787-5. doi: 10.1016/j.wneu.2019.06.141. [Epub ahead of
print] PubMed PMID: 31254712.