/usr/share/vtk/Medical/ is in vtk-examples 5.8.0-14.1ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/vtk/Medical/Cxx/
/usr/share/vtk/Medical/Cxx/CMakeLists.txt
/usr/share/vtk/Medical/Cxx/GenerateCubesFromLabels.cxx
/usr/share/vtk/Medical/Cxx/GenerateModelsFromLabels.cxx
/usr/share/vtk/Medical/Cxx/Medical1.cxx
/usr/share/vtk/Medical/Cxx/Medical2.cxx
/usr/share/vtk/Medical/Cxx/Medical3.cxx
/usr/share/vtk/Medical/Cxx/Medical4.cxx
/usr/share/vtk/Medical/Cxx/TestMedical1.cxx
/usr/share/vtk/Medical/Cxx/TestMedical2.cxx
/usr/share/vtk/Medical/Cxx/TestMedical3.cxx
/usr/share/vtk/Medical/Cxx/TestMedical4.cxx
/usr/share/vtk/Medical/Python/
/usr/share/vtk/Medical/Python/Medical1.py
/usr/share/vtk/Medical/Python/Medical2.py
/usr/share/vtk/Medical/Python/Medical3.py
/usr/share/vtk/Medical/Python/Medical4.py
/usr/share/vtk/Medical/Tcl/
/usr/share/vtk/Medical/Tcl/Medical1.tcl
/usr/share/vtk/Medical/Tcl/Medical2.tcl
/usr/share/vtk/Medical/Tcl/Medical3.tcl
/usr/share/vtk/Medical/Tcl/Medical4.tcl