It has all the characteristics of a concerto, and is indeed a truncated one-much more so than Schumann's F minor Sonata, called Concert Sans Orchestre.
"Chopin: The Man and His Music"
James Huneker
The chef d'Orchestre rose from his chair and shook his head, pointing to the beads of moisture upon his sallow forehead.
"Burning Sands"
Arthur Weigall