Ectopic Splenic Nodules in the Pancreas of a Capuchin Monkey ( Cebus albifrons)

Abstract

Ectopic splenic tissue was found on the pancreas of a capuchin monkey (Cebus albifrons), although it had no connection to the main body of the spleen. Both the ectopic tissue and the spleen itself were histologically normal.

Ectopic splenic nodules in the olive baboon (Papio cynocephalus anubis)

“…Spontaneous developmental anomaly of body organs among monkeys and apes have been summarized [3], but there has been no report regarding ectopic splenic nodules in baboons. The occurrence of three nodular spleens in our study is unique in that, unlike in the previous case report of ectopic spleens in capuchin monkeys [6], a normal spleen was absent. Instead of normal spleen, three small nodules, about 0.5–1 cm in diameter were found embedded in the tail of the pancreas on the left side of the stomach.…”

“…Instead of normal spleen, three small nodules, about 0.5–1 cm in diameter were found embedded in the tail of the pancreas on the left side of the stomach. Ectopic spleen and splenic lobulation are commmon in humans [10] but occur infrequently in non‐human primate [6]. Other less common conditions such as wandering spleen and polysplenia have particular clinical significance [5] and are often associated with digestive tract disorders [9], cardiac anomalies [13] and partial visceral hereotaxia and concomitant levoisomerism [5].…”

“…Spleen anomalies include absence of the spleen (asplenia), multiple small spleens (polysplenia) and occurrence of accessory spleens or ectopic splenic nodule [9]. Cases of ectopic spleen in non‐human primates is usually an incidental finding during routine necropsy [6]. The pathogenesis of this spleen anomaly in primates is a result of abnormality of embryonic curvature [2] or foetal trauma [6].…”

“…Cases of ectopic spleen in non‐human primates is usually an incidental finding during routine necropsy [6]. The pathogenesis of this spleen anomaly in primates is a result of abnormality of embryonic curvature [2] or foetal trauma [6]. Although of common occurrence in humans [11], ectopic splenic nodules are rare in non‐human primates.…”

Morphology of Pancreatic Tissue-containing Accessory Spleen in an APA Hamster

“…There have been many reports on the incidence and histology of accessory spleen (AS) in the human being [2,4-61, ape [8], rabbit [3,9], and mouse [7], but none in hamster to our knowledge. Recently, we have examined 71 golden hamsters of APA strain, and found AS in 19 animals (27%) ( Table 1).…”