Adverb
posterolaterally (comparative more posterolaterally, superlative most posterolaterally)
In a posterolateral manner
The external layer is anteriorly continuous with the pretracheal fascia and posterolaterally continuous with the carotid sheath. Source: Internet
The upper third are the levator ani muscles (transcervical, pubocervical ) and the sacrocervical ligaments; these areas are also described as the cardinal ligaments laterally and uterosacral ligaments posterolaterally. Source: Internet