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Near-infrared surveys of high-mass star-forming regions start to shed lightonto their stellar content. A particular class of objects found in theseregions, the so-called massive Young Stellar Objects (YSOs) are surrounded bydense circumstellar material. Several near- and mid-infrared diagnostic toolsare used to infer the physical characteristics and geometry of thiscircumstellar matter. Near-infrared hydrogen emission lines provide evidencefor a disk-wind. The profiles of the first overtone of the CO band-heads,originating in the inner 10 AU from the central star, are well fitted assuminga keplerian rotating disk. The mid-infrared spectral energy distributionrequires the presence of a more extended envelope containing dust at atemperature of about 200 K. CRIRES observations of CO fundamental absorptionlines confirm the presence of a cold envelope. We discuss the evolutionarystatus of these objects.

An infrared view of (candidate accretion) disks around massive young stars