Primary small intestinal lymphangiosarcoma in a dog presenting with a segmental partial mesenteric volvulus.

Area of Science:

• Veterinary Medicine
• Surgical Pathology
• Canine Oncology

Background:

• Chronic vomiting and diarrhea are common presenting signs in dogs.
• Mesenteric volvulus is a rare but serious cause of intestinal obstruction.
• Primary intestinal tumors can present with non-specific gastrointestinal signs.

Purpose of the Study:

• To report the first case of primary small intestinal lymphangiosarcoma in a dog.
• To describe the diagnostic approach and findings for this rare condition.
• To emphasize the role of immunohistochemistry in diagnosing intestinal lymphangiosarcoma.

Main Methods:

• Abdominal computed tomography (CT) for initial imaging.
• Exploratory laparotomy for surgical intervention.
• Histopathology and immunohistochemistry for definitive diagnosis of jejunal lymphangiosarcoma.

Main Results:

• A perforated, segmental partial mesenteric volvulus of the distal jejunum was identified.
• Surgical resection of the affected jejunal segment was performed.
• Histopathology and immunohistochemistry confirmed jejunal lymphangiosarcoma.

Conclusions:

• This is the first documented case of primary jejunal lymphangiosarcoma in a canine patient.
• Early diagnosis and surgical management are crucial for intestinal volvulus.
• Immunohistochemistry is essential for differentiating lymphangiosarcoma from other intestinal neoplasms.