Nem tudo que parece ser, é lesão: aspectos anatômicos, não lesões, artefatos, lesões sem significado clínico e alterações post mortem encontrados na necropsia de suínos domésticos e selvagens (Sus scrofa)

Abstract

Nem tudo que parece ser, é lesão: aspectos anatômicos, não lesões, artefatos, lesões sem significado clínico e alterações post mortem encontrados na necropsia de suínos domésticos e selvagens (Sus scrofa) The interpretation of the changes observed at necropsy is an important step for the success of the final diagnosis. This article aims to describe and illustrate the anatomical structures, non-lesions, artifacts, lesions without clinical significance and postmortem changes observed in domestic and wild pigs. Moreover, the article also recommends collection techniques of organs or structures for the diagnosis of diseases affecting this species. The main anatomical structures and non-lesions described are marginal lingual papillae, pars oesophagea of the stomach, torus pyloricus, and well demarcated lobular pattern of the liver (gastrointestinal system); tonsils of the soft palate, gastric lymphoid tissue, Peyer's patches of the small intestine, marginal folds of the spleen (hematopoietic system); prominent mediastinum testis and placental areolae (reproductive system); pulmonary atelectasis and periople (fetus); and carpal glands (integumentary system). The discussed artifacts related to euthanasia are petechiae on the surface of the lung and kidney, false anemia due to exsanguination, subdural hemorrhage due to cerebral concussion, pseudoinfarcts of the spleen, and cerebriform appearance of the small intestine. Lesions without clinical significance described are renal cysts, lymph nodes with iron pigment, papillomas and hemangiomas on the scrotum, osseous metaplasia in the mesentery, and hyperemia of the gastric mucosa. Commonly found postmortem changes are livor mortis, pale muscles, pseudomelanosis, and serosanguinous fluid in the thoracic and abdominal cavities of fetuses.

Primary skin diseases and cutaneous manifestations of systemic diseases in swine

“…Papilloma occurred in a slaughter pig, with no information on the anatomical location, but it can affect growing pigs, especially around the neck, along the back and in the ears (Torrison & Cameron 2019). Hemangioma was observed in the scrotum of an adult pig, corroborating with Rech et al (2013) who described that papillomas and hemangiomas can be seen in the scrotum of old necks and are considered lesions with no clinical significance. Papilloma and scrotal hemangioma represented 0.6% each of the total skin lesions diagnosed.…”

A taste of pathology

“…After death, the process of decomposition of a body, involves autolysis and bacterial putrefaction. As a result of bacterial putrefaction, body cavities and organs become distended by gas bubbles (Brooks 2016) which along with the discoloration of the autolyzed tissues, as the liver, also impart the appearance of aerated chocolate (Rech et al 2013).…”

Neoplasmas em suínos: 37 casos

“…O segundo caso é de um suíno adulto que apresentava lesões papilomatosas difusas na pele do escroto, uma alteração sem significado clínico que é comumente descrita para cachaços velhos (Rech et al 2013). Em ambos os casos, as as lesões macroscópicas eram proliferativas, semelhantes a verrugas, com 1-1,5 cm de diâmetro.…”