Histological Accommodation
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
Histological accommodation refers to the change in shape of a cell or cellular complex in response to external conditions without altering specific structural and functional properties. It is considered similar to metaplasia but is distinguished as pseudometaplasia, commonly occurring in inflammatory and hyperplastic processes.
Encyclopedia entry (1928–1936)
HISTOLOGICAL ACCOMMODATION, change in the shape of a cell or cellular complex under the influence of external conditions as an adaptation to them. Since this does not involve changes in the specific, structural, and functional properties of cells, histological accommodation has only an external similarity to metaplasia (see), and is also called pseudometaplasia. Examples of histological accommodation: flattening of the cylindrical epithelium in a cyst with increased internal pressure, transformation of the vascular endothelium (e.g., in lymphatic vessels) or serous epithelium (e.g., of the pericardium) during inflammation, or of the alveolar epithelium of the lungs with a decrease in intra-alveolar pressure (e.g., in atelectasis) into high cylindrical cells. Connective tissue cells in the process of histological accommodation may also take on an epithelial-like character. The majority of cases of histological accommodation occur in inflammatory and hyperplastic processes.
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“Histological Accommodation.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/histological-accommodation/