Primary renal lymphoma in domestic cat (Felis catus)

Case report

Abstract

Renal primary neoplasms in cats are rare and account for less than 2% of all cancers, the
majority of malignant feature. Hematopoietic tumors are the most common in cats and 90%
are diagnosed as lymphoma, being between 30 and 50% of all malignant tumors found in this
species. This cancer originates in lymphoid cells found in solid organs such as lymph nodes,
liver and intestine, and is currently the most common cancer in domestic cats with an average
age of 11 years. The most common forms of presentation are mediastinal, nodal, extranodal
and digestive. Clinical signs are diverse and related to the anatomical site in which the disease
develops. Chemotherapy is the treatment for systemic forms, while radiotherapy and surgery
associated or not with chemotherapy treatments are indicated for localized forms. The
prognosis of this disease is variable, depending on the clinical condition of the animal, the
type and stage of lymphoma and response to treatment. The objective of this study was to
conduct a case report of a cat, male, mixed breed, neutered, 13 years old, who presented the
following clinical signs: cachexia, increased abdominal volume, dehydration, polyuria,
polydipsia and loss of appetite. The pathology and clinical findings confirmed the renal
lymphoma; the primary renal lymphoma was confirmed primarily by the lack of involvement
of other sites of cancer