"circumstantial difficulties" is correct and usable in written English.
It can usually be used to refer to unexpected issues that arise due to external factors. For example: "We encountered many circumstantial difficulties due to the sudden economic downturn."
Checklists and prediction scores developed to improve the circumstantial difficulty of airway management in the ICU have had only modest outcomes [ 7, 34].
From the latest research posted on its website, and updated today, it appears the researchers find many of the same trends we have already encountered - measurement difficulties, circumstantial differences, and the unequal impact on wages up and down the pay scale.
Gentes are not given taxonomic designations but are sometimes known by their host species ("redstart cuckoo," "dunnock cuckoo," etc).. Evidence for this theory is largely circumstantial because of the difficulty in establishing the identity of individual cuckoos, but no plausible alternative theory has been proposed.
Anticipating considerable experimental difficulties to target repetitive sequences by mutagenesis approaches, we discuss circumstantial evidence for potential functions of MER41 repeats in IFN-γ induced gene regulation.
"Because of the inherent difficulty in obtaining direct evidence of copying, it is usually proved by circumstantial evidence of access to the copyrighted work and substantial similarities as to protectible material in the two works". Reyher, 533 F.2d at 90, citing Arnstein v. Porter, 154 F.2d 468, 468 (2d Cir.1946).
The difficulty of that issue for the jurors was compounded by the fact -stressed by both prosecution and defense lawyers - that the evidence against Mr. Roth was entirely circumstantial.
See also circumstantial evidence.
Talk about circumstantial luck.
"The evidence was circumstantial".
