Laryngeal neoplasia in dogs and cats
Neoplasms originating from the larynx are uncommon in dogs and cats. More commonly, tumors originating in tissues adjacent to the larynx, such as thyroid carcinoma and lymphoma, compress or invade the larynx and distort normal laryngeal structures. Clinical signs of extrathoracic (upper) airway obstruction result. Laryngeal tumors include carcinoma (squamous cell, undifferentiated, and adenocarcinoma), lymphoma, melanoma, mast cell tumors and other sarcomas, and benign neoplasia. Lymphoma is the most common tumor in cats.
The clinical signs of laryngeal neoplasia are similar to those of other laryngeal diseases and include noisy respiration, stridor, increased inspiratory efforts, cyanosis, syncope, and a change in bark or meow. Mass lesions can also cause concurrent dysphagia, aspiration pneumonia, or visible or palpable masses in the ventral neck.
Extralaryngeal mass lesions are often identified by palpation of the neck. Primary laryngeal tumors are rarely palpable and are best identified by laryngoscopy. Laryngeal radiographs, ultrasonography, or computed tomography can be useful in assessing the extent of the disease. Differential diagnoses include obstructing laryngitis, nasopharyngeal polyp, foreign body, traumatic granuloma, and abscess. For a definitive diagnosis of neoplasia to be made, histologic or cystologic examination of a biopsy specimen of the mass must be done. A diagnosis of malignant neoplasia should not be made on the basis of the gross appearance alone.
The therapy used depends on the type of tumor identified histologically. Bening tumors should be excised surgically if possible. Complete surgical excision of malignant tumors is rarely possible, although ventilation may be improved and time may be gained to allow other treatments such as irradiation or chemotherapy to become effective. Complete laryngectomy and permanent tracheostomy can be considered in select animals.
The prognosis in animals with bening tumors is excellent if the tumors can be totally resected. Malignant neoplasms are associated with a poor prognosis.
We would love to hear your pet's story. Please add a comment.
The clinical signs of laryngeal neoplasia are similar to those of other laryngeal diseases and include noisy respiration, stridor, increased inspiratory efforts, cyanosis, syncope, and a change in bark or meow. Mass lesions can also cause concurrent dysphagia, aspiration pneumonia, or visible or palpable masses in the ventral neck.
Extralaryngeal mass lesions are often identified by palpation of the neck. Primary laryngeal tumors are rarely palpable and are best identified by laryngoscopy. Laryngeal radiographs, ultrasonography, or computed tomography can be useful in assessing the extent of the disease. Differential diagnoses include obstructing laryngitis, nasopharyngeal polyp, foreign body, traumatic granuloma, and abscess. For a definitive diagnosis of neoplasia to be made, histologic or cystologic examination of a biopsy specimen of the mass must be done. A diagnosis of malignant neoplasia should not be made on the basis of the gross appearance alone.
The therapy used depends on the type of tumor identified histologically. Bening tumors should be excised surgically if possible. Complete surgical excision of malignant tumors is rarely possible, although ventilation may be improved and time may be gained to allow other treatments such as irradiation or chemotherapy to become effective. Complete laryngectomy and permanent tracheostomy can be considered in select animals.
The prognosis in animals with bening tumors is excellent if the tumors can be totally resected. Malignant neoplasms are associated with a poor prognosis.
We would love to hear your pet's story. Please add a comment.
MORE VETERINARY ARTICLES
-
System venous and right heart filling pressures are reflected at the jugular veins in dogs and cats . These veins should not be distended wh...
-
Bronchoscopy is indicated for the evaluation of the major airways in animals with suspected structural abnormalities; for visual assessment...
-
The strength and regularity of the peripheral arterial pressure waves and the pulse rate are assessed by palpation of the femoral or other p...
-
Mucous membrane color and capillary refill time (CRT) are used to estimate the adequacy of peripheral perfusion. Normally the oral membranes...
-
Brand Name Heartgard Plus (Merial), Iverhart Plus (Virbac) Generic Name Ivermectin, Pyrantel pamoate What is the most important inform...
-
Canine Coronaviral Enteritis | Coronaviral Enteritis in Dogs Coronaviral enteritis in dogs occurs when coronavirus invades and destroys ma...
-
Canine Bronchitis | Bronchitis in Dogs Chronic bronchitis in dogs refers to long-term airway inflammation. There is generally a component ...
-
Renal enlargement is usually detected by physical examination or by abdominal radiography or by ultrasonography . A quick rule of thumb is ...
-
Canine Skin Disease | Skin Infections in Dogs Staphylococcus intermedius is the most common cause of pyoderma in dogs and cats. Deep py...
-
Dog Allergies | Allergies in Dogs Allergies in dogs are basically an immune system overreaction. The nasal cavity is an uncommon primary...
