The phrase "a growing mass of" is correct and usable in written English.
It can be used to describe an increasing quantity or number of something, often in a context where the growth is significant or noteworthy.
Example: "There is a growing mass of evidence supporting the theory of climate change."
Alternatives: "an increasing number of" or "a rising tide of".
I was a teenage girl, a growing mass of longing, and Paris was accommodating.
"The US faces the prospect of an institutional failure, which might be triggered by a growing mass of real-life problems".
What the ELSPA figures quietly confirm, alongside a growing mass of comparable data, is that society really is moving beyond the age of mass non-interactive entertainment.
There's already a growing mass of writers who are simultaneously contributing to games, films, comics and novels, combining narrative methods as entertainment evolves.
The "finished" film Lucas prizes so dearly barely feels like a film at all, but rather the centrepiece of a vast global brand, there to provide an anchor for a growing mass of follow-up material.
Rather, it is a divide between the mainstream political institutions that champion technocratic managerialism, and through which politicians often seek to bypass democratic processes, and a growing mass of people who feel alienated and politically voiceless.
Welcome to the Brave Old World – a dystopic Britain where an endlessly growing mass of grey-haired incontinents are financially supported by a dwindling trickle of ever-more-burdened young people.
It must either end its hostility toward private businesses — or accept that a sharply growing mass of unemployed will nullify the progress of the last three years.
We report a case of POS with a growing mass but no evidence of metastasis.
More fundamentally, legislation in Italy is too often made by emergency decree, resulting in an ever growing mass of regulation.
In all cases pain, a growing mass or a limitation of motion was the clinical presentation of the sarcoma.
