Pathology in practice. Jejunal duplication cyst, with minimal segmental lymphoplasmacytic and eosinophilic jejunitis in a dog

Surgical management of a cervical oesophageal duplication cyst with tracheal communication in a dog

Foregut duplication cysts can arise anywhere in the gastrointestinal system, leading to non-specific clinical signs in small animals. There are few reports of foregut duplication cysts in the literature that have been managed surgically. This report describes a case of multilevel foregut duplication cysts in a dog, including a cervical oesophageal duplication cyst with tracheal communication. Surgical treatment by resection resulted in the resolution of clinical signs. No clinical evidence of recurrence was noted at 12 months post-operatively. Surgical resection may be a feasible option for the management of foregut duplication cysts that cause clinical signs in dogs.

Colonic mucinous adenocarcinoma in a tufted deer: differential diagnosis and literature review

An 18-y-old female tufted deer (Elaphodus cephalophus) had a short history of chronic diarrhea, progressive weight loss, and hindlimb instability. Given the poor prognosis, the deer was euthanized and submitted for postmortem examination. The most significant gross finding was segmental and multinodular mural thickening of the proximal colon. On cut surface of the affected colonic segments, 0.5-2-cm diameter, intramural, multiloculated, cystic structures containing gray, translucent, gelatinous material elevated the edematous mucosa. Microscopically, the intramural cystic structures were filled with mucinous matrix admixed with foamy macrophages, and lined by discontinuous segments of well-differentiated columnar, pancytokeratin-positive epithelium with basilar nuclei. Multifocally, transition was observed from hyperplastic mucosal crypt epithelium to dysplastic or neoplastic columnar and flattened epithelium lining submucosal and serosal cysts. Cyst lumina were irregularly disrupted by polypoid ingrowths of collagenous tissue covered by attenuated epithelium. Based on these findings, we diagnosed a well-differentiated mucinous adenocarcinoma. Although intestinal adenocarcinomas have been described in humans and animals, they are considered uncommon in most domestic species, except for sheep, for which genetic and environmental factors appear to influence occurrence. Our report addresses the knowledge gap regarding intestinal adenocarcinomas affecting cervids and specifically the tufted deer, a less-studied, near-threatened Asian cervid.