Prevalence, number and morphological types of multinucleated histiocytic giant cells in equine inflammatory dermatoses: a retrospective light microscopic study of skin-biopsy specimens from 362 horses.

The research focuses on the investigation of prevalence, count, and types of multinucleated histiocytic giant cells (MHGC) in skin biopsies of horses that show inflammatory skin conditions. The study records that these cells are more prevalent in granulomatous dermatoses and are likely to have no diagnostic significance.

Research Objective and Methodology

• The primary objective of the study is to discover the prevalence, quantity, and morphological types of the Multinucleated Histiocytic Giant Cells (MHGC) present in skin-biopsy specimens originating from horses with inflammatory dermatoses. The research also aims to verify whether these cells are linked with particular conditions.
• Researchers scrutinized skin-biopsy specimens obtained from 335 horses with inflammatory skin disorders and 27 horses with normal skin, investigating the prevalence, number, and morphological kind of MHGC.

Research Findings

• An increased prevalence and number of MHGC were discovered in granulomatous dermatoses compared to nongranulomatous dermatoses. Granulomatous dermatoses are characterized by a specific type of inflammation in tissues, often in response to infections, where immune cells form granulomes.
• Despite the cause of dermatoses, whether infectious or noninfectious, there was no significant difference recorded in the prevalence or morphological types of MHGC.
• Foreign-body MHGC was the prevalent type in almost all examined cases.
• Conversely, MHGC weren’t observed in normal skin samples.

Conclusions and Implications

• The investigation concluded that MHGC are frequently present in a wide range of equine inflammatory dermatoses, particularly those that are granulomatous.
• However, the study denotes that the frequency, number, and morphological kind of MHGC have less diagnostic importance.
• As the prevalence, quantity, and types of MHGC do not hold significant diagnostic value, other research strategies and tools like special stains and tissue cultures become necessary to confirm specific diagnoses. Accordingly, this ensures a more accurate and comprehensive diagnosis.