Vor die Therapie setzten die Gotter die Diagnose. Otto NiigeJi Renal
biopsy has decisively enriched renal diagnostics. Kidney diseases may be
monitored during their entire course, and new techniques - such as
immunofluorescence and electron microscopy - may be systematically
applied, resulting in novel insights into the morphogenesis,
pathogenesis, and etiology of kidney lesions. These insights, in turn,
have served as new starting points, in the spirit of the quotation
above, for the institution of causal therapy by the clinician. This work
presents our findings based on 20 years of experience in evaluating
renal biopsies. As of the end of 1974, our computer-supported,
systematic clinical, morphologic, and follow-up evaluation of case
material consisted of over 2000 biopsies, including 679 examined by
electron microscopy and 400 by immunofluorescence microscopy. The
subsequent 500 biopsies (400 studied by electron microscopy and 300 by
immunofluorescence) were con- sidered qualitatively only. In order to
enhance qualitative findings with quantitative data, it was necessary to
devise new methods for quantifying electron-microscopic findings.
Additionally, we attempted to correlate cyto- logic and
immunofluorescent observations to integrate the isolated findings of
electron microscopy into a vital cytologic pattern of reactions. We also
attempted to evaluate the almost overwhelming flood of publications,
especially those appearing within the last 10 years. The idea for this
book was conceived a decade ago. At that time, however, our own
experience in renal biopsy diagnostics seemed insufficient to sup- port
such a major undertaking.