[Possibilities of morphological diagnosis of amyloid in the subcutaneous adipose tissue biopsy specimens].

Objective: To retrospectively analyze the results of histological examination of subcutaneous adipose tissue (SAT) biopsy specimens versus the diagnostic value of drugs manufactured by different procedures.

Material And Methods: The investigators selected and analyzed the results of biopsy studies with the simultaneous production of two different types of tissue specimens (squashed native specimens, sections from the paraffin blocks) from the abdominal SAT biopsy specimens obtained from 118 patients. In each case, the tissue specimens were stained with Congo red and examined in polarized light, concurrently using the positive control. The criterion for amyloid was the ability of congophilic deposits to birefringence with a characteristic luminescence spectrum when examined in polarized light.

Results: Compared to the sections from the paraffin blocks, the native specimens were shown to be of high diagnostic value. The advantages of different types of tissue samples made from SAT biopsy specimens were formulated.

Conclusion: The SAT biopsy specimens are characterized by the minimal risk to a patient and by the easy way of sampling and are a frequent subject for screening biopsies. In addition to the type of amyloid, the volume, quality, and method of processing the biopsy specimen are responsible for the diagnostic value of SAT examination. The study of squashed native specimens stained with Congo red is most informative when using polarized light.