  We present high-resolution observations of Henize 2-10 in Ks (2.2um), L'
(3.8um), M' (4.8um) bands. These allow for the first time to track accurately
the structures at the heart of the galaxy from the optical to the radio. All
radio knots previously observed can now be associated with L' and Ks emitting
regions. This implies a revision of their physical nature. Instead of highly
extinguished ultra-dense HII regions, we propose that two of the 5 radio knots
are either supernova remnants or "normal" HII regions, while the remaining
three are bona fide ultra-dense HII regions, although less obscured than was
previously thought.
