This article describes a retrospective study on
myelopathy, induced by monosegmental prolapsed disc and
spondylosis. To assess pre- and postoperative clinical and
radiological findings related to myelopathy, and factors
influencing the outcome, 20 disc herniation (group A) and
11 spondylosis patients (group B) were studied. Average
duration of myelopathy in groups A and B were 3 and
8.7 months, respectively. Anterior decompression and fusion
were performed. Pre- and postoperative clinical and radiological
findings and outcomes were assessed. Average preoperative
disc heights were 85.9% of normal in group A and
72.7% in group B. Average anteroposterior canal diameter and
Pavlov ratio at diseased level were 13.9 mm and 0.81 in group
A, respectively, and 12.1 mm and 0.78 in group B. Five group
A (25.0%) and four group B cases (36.4%) had radiculopathy.
Cord compressions among 20 group A patients were median
in seven and paramedian in 13. In the 11 group B patients,
nine were median and two were paramedian. High signal
intensity was observed in 19 group A and ten group B
patients. Postoperative regression of T2-weighted high signal
intensity in 14 group A (73.7%) and two group B patients
(20.0%) was observed. Preoperative JOA scores in groups A
and B were 10.3 and 12.8, respectively, which became 66.2