When comparing with YWCA, I was thinking of the entrance porch, the periscope like core treatment, vertically proportioned openings. The edges of the overall form ( corners, skyline) is also similar. No fins on this one.

© Thomas Oommen/Prof. Oommen Thomas Architecture Archive

Service Block, Sree Chitra Tirunal Institute for Medical Sciences and Technology. 
Architects: Prof. Oommen Thomas and Ar. N.Mahesh

The tallest dedicated hospital service block in Kerala at the time of its design and construction ( 1976-77), this building contained laboratories with its ancillary services, associated offices, mortuary, staff canteen and so on. These services supported the main hospital block designed by architect Thomas Panicker. The entry canopy was inspired by the canopies of local tea shops in Kerala (called 'Thatti' in malayalam) that keep out the sun. The point here was to make clear the restricted entry into the building, since its functions were not meant to be accessed by patients.  

The service block was also sited to make sure that any future expansion to the hospital would preserve the open space in front and create a public court in between. The third block was added in the 1980s by Bennet Pithvadian and associates. In the photograph it can be seen to the right.