Solid carcinoma of the glandula superficialis palpebrae tertiae in a horse.

The research outlines a case of solid carcinoma in a seven-year-old Dutch warmblood mare, particularly in the glandula superficialis palpebrae tertiae, an eye gland. The cancerous tumor extensively infiltrated and metastasized to various surrounding structures, including the neighboring region of the eye, mandibular region, salivary glands, nearby part of the esophagus, and regional lymph nodes.

Identification of Carcinoma

• The study describes a rare case of solid carcinoma in the superficial gland of the third eyelid, scientifically known as the glandula superficialis palpebrae tertiae, of a seven-year-old Dutch warmblood mare, a breed of horse.

Degree of Metastasis

• The paper notes that the cancerous cells did not remain localized to the initial site but rather had shown extensive infiltration. This means the cancer cells spread and grew into surrounding tissues from the initial location, the gland of the third eyelid.
• The researchers found metastases in several areas around the horse’s body. Unlike infiltration, metastasis involves the spread of cancer cells to different parts of the body via the bloodstream or the lymphatic system.

Sites of Metastasis

• The metastasis involves the surrounding area of the eye, pointing to the aggressive nature of this particular tumor as it could spread close to the initial site.
• The cancer was found to have spread and developed tumors in the mandibular region, or the lower jaw area, indicating that it was capable of reaching relatively distant sites.
• The salivary glands, involved in producing saliva, also showed signs of metastasis.
• Moreover, the researchers found metastases in the proximal part of the esophagus, the tube that connects the throat to the stomach, and in the regional lymph nodes, which are small, bean-shaped structures that produce and store cells that fight infection and disease.