  We briefly outline the two popular approaches on radiative corrections to
neutrino masses and mixing angles, and then carry out a detailed numerical
analysis for a consistency check between them in MSSM. We find that the two
approaches are nearly consistent with a small discrepancy of a factor of 13
percent in mass eigenvalues at low energy scale, but the predictions on mixing
angles are almost consistent. We check the stability of the three types of
neutrino models, i.e., hierarchical, inverted hierarchical and degenerate
models, under radiative corrections, using both approaches, and find consistent
conclusions. The neutrino mass models which are found to be stable under
radiative corrections in MSSM are the normal hierarchical model and the
inverted hierarchical model with opposite CP parity. We also carry out
numerical analysis on some important conjectures related to radiative
corrections in MSSM, viz., radiative magnification of solar and atmospheric
mixings in case of nearly degenerate model having same CP parity (MPR
conjecture) and radiative generation of solar mass scale in exactly two-fold
degenerate model with opposite CP parity and non-zero reactor angle (JM
conjecture). We observe certain exceptions to these conjectures. Finally the
effect of scale-dependent vacuum expectation value in neutrino mass
renormalisation is discussed.
