L20: Chronic Vomiting In Dogs And Cats (Hill) Flashcards
Causes of dysphagia/regurge/vomiting
Intestinal vs. non-intestinal
- inflammation/infection
- extraluminal compression
- intraluminal obstruction
- toxin
- neuromuscular dysfx
2 main categories of dysphagia
Oral (more common)
Pharyngeal (less common)
Causes of oral dysphagia
Congenital: cleft lip/palate (brachycephalics)
Acquired:
- dental/gingivitis/periodontal dz
- eosinophilic and other ulcers ex. Colici (cats)
- stomatitis in cats
- benign mucosal hyperplasia (collies, boxers, drugs like cyclosporine, amlodipine)
- ranula
- vesicular dz
- FB
- retrobulbar abscess
- sialocele/sialodenitis
- craniomandibular osteopathy
- masticatory muscle myositis
- trigeminal neuritis (dropped jaw)
- neoplasia
Chronic Ulcerative Paradental Stomatitis (CUPS)
- gingiva reacting to tooth tartar, or sometimes assoc. with outflow of salivary duct
- Tx: immunosuppression therapy or removing teeth
Sialoadenitis
- causes inflammation behind the eye
- opening mouth can put pressure on salivary ducts and back of eyes
- can cause a form of seizures which –> chronic vomiting
Benign neoplasia or the oral cavity
- epulides
- papillomas
Malignant neoplasia of the oral cavity
- SCC
- Melanoma
- Fibrosarcoma
Pharyngeal dz differentials
- inflammation
- compression
- luminal mass
- MOST common: neuromuscular dz: cricopharyngeal achalasia or dyssynchrony, rabies
*pharyngeal dz can look like other things ie. Trigeminal palsy
Cricopharyngeal achalasia more common in younger or older dogs?
Younger
Eval for oral dz or dysphagia
-Hx/PE
-watch try to eat or drink
-exam of mouth and pharynx under general anesthesia!
-look for odynophagia (painful swallowing) and when it occurs
+/- blood tests/rads/fluoro/EMG/Ab test
Swallowing disorders and tx
Cricopharyngeal achalasia (failure of UES to open): sx or botox injections Cricopharyngeal dyssnchrony (bad timing of UES opening): tx as megaesophagus
4 causes of regurgitation
1) Neuromuscular dysfx
2) Intraluminal obstruction
3) Inflammatory dz
4) Extraluminal compression
Causes of neuromuscular dysfx –> regurgitation
- megaesophagus (acquired or idiopathic)*
- esophageal dysmotility (+/- LarPar) due to myasthenia*, polymyositis/neuritis, SLE hypoadrenocorticism, hypothyroidism, organophosphate or lead toxicity, distemper
Causes of intraluminal obstruction –> regurgitation
- FB/hairball*
- stricture*
- hiatal hernia*
- granuloma spirocerca lupi*
- tumor
- esophageal diverticulum
- gastroesophageal intussussception (stomach herniates into esophagus)
Inflammatory diseases that –> regurgitation
- Esophagitis (thermal, chemical, or reflux ie. Post-anesthesia)
- Myositis
- Granuloma (fungal, bacterial, parasitic*)
Causes of extraluminal compression that –> regurgitation
Vascular ring anomaly
Intrathoracic tumors (thymoma, lymphoma)
Hilar lymphadenopathy