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Summary: This report describes a rare case of chronic intestinal pseudo‐obstruction (CIPO) in a 12‐year‐old Quarter Horse gelding, caused by lymphocytic myenteric ganglionitis (MG) associated with equine herpesvirus 1 (EHV‐1) and equine herpesvirus 5 (EHV‐5) infection. The horse presented with recurrent colic and weight loss over 1.5 years. Repetitive transrectal examinations consistently revealed small colon impaction and enlargement. During postmortem examination alternating segments of enlarged and reduced luminal diameter were observed throughout the entire intestinal tract. MG with lymphocytic infiltrates and neuronal degeneration of the large intestine were found on histopathological analysis. Additionally, polymerase chain reaction (PCR) analysis confirmed the presence of EHV‐1 and EHV‐5 DNA in affected intestinal tissues. Further research is needed to understand the pathophysiology of MG and its association with herpesviruses. Early recognition and diagnosis of MG‐associated CIPO may improve treatment approaches and outcomes for future cases. [ABSTRACT FROM AUTHOR]

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A skin lesion classified as a vascular malformation is reported in a young-adult, female guinea pig. The physical examination revealed a 3 × 2-cm irregularly shaped violaceous plaque located on the left caudal flank. The surface of the plaque was ulcerated and bled intermittently, resulting in fatal blood loss. On histology the mass consisted of variably sized vascular spaces filled with red blood cells and variable amounts of extramedullary haematopoietic cells, lined by well-differentiated endothelial cells often surrounded by one layer of spindle-shaped cells. Based on immunohistochemistry, the spindle cell population was confirmed to be smooth muscle cells and no proliferation of endothelial cells was found with the Ki67 proliferation marker. Histological and immunohistochemical findings were consistent with a vascular malformation. Classification of vascular malformations and potential treatments are discussed. To the authors’ knowledge, this is the first reported case of a cutaneous vascular lesion in a guinea pig. [ABSTRACT FROM AUTHOR]

The article presents a case study of a 5-year-old intact male cane corso dog who was presented for the complaint of recurrent episodes of alopecia. The dog had developed alopecia on the face in March or April with spontaneous regrowth in July for three consecutive year. A complete alopecia of the dorsal muzzle, facial folds and convex and concave sides of both pinnae have been revealed with the dermatological examination.