Tumors of the thoracic cavity Flashcards Preview

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Flashcards in Tumors of the thoracic cavity Deck (28)
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1
Q

Chest wall tumors

A

Large dogs, middle ages (4-6)
Rare in cats
non specific CS - discomfort, weight loss, lanes, respiratory
Incidental finding

2
Q

Differential chest wall tumors

A

Osteosarcomas (73%)
Chondrosarcomas

ACT VERY DIFFERENTLY

3
Q

Chest wall tumor work up and staging

A

thoracic radiographs - underestimate
Cytology - not specific: sarcoma
Open wedge biopsy - subtype!
CT

4
Q

Chest wall tumor treatment

A

en bloc resection and reconstruction. place chest tube
max 6 ribs removed.
caudal lung lobectomy?
OSA - adjunct chemo

5
Q

Chest wall prognosis

A

OSA - much better with chemo added

CSA 5-6x better than OSA

6
Q

Chest wall tumor Prognostic factors

A

type and complete resection

5.6x recurrence w/o complete resection

7
Q

Lung tumors DOG

A

uncommon
older
boxer, doberman, irish setter, bernese MD
non productive cough, ex. into., respiratory signs

8
Q

Lung tumors CAT

A

rare.
older (persian?)
lameness!!!

9
Q

lung tumor differentials

A

CARCINOMAS: bronchial, broncho-alveolar, alveolar

10
Q

lung tumor differentials dog

A
bronchoalveolar AVA (85%)
SCC

Histiocytic sarcoma - multiple multilobutated masses

11
Q

lung tumor differentials cat

A

bronchial ACA

12
Q

Lung tumor work up and staging

A

Caudal lobes, diffuse
rads
Dog: demarcated, spherical, cavitated
Cat: 3 patterns
Transthoracic FNA/Cytology- not recommended.
Biopsies - high complications

13
Q

Cat lung tumor radiograph presentations

A

pulmonary mass w/ cavitation (56%)
Mixed bronchoalveolar pattern (33%)
Ill-defined mass (22%)

14
Q

Lung digit syndrome

A

Cats - weight bearing digits, 3rd phalanx

DO NOT AMPUTATE W/O rads

15
Q

Lung tumor treatment

A

Lateral thoracotomy w/ hilar lnn biopsy

compete lobectomy preferred

16
Q

Dog lung tumor prognostic variables

A

*tumor size
*Location (peripheral)
*CS at presentation
Clinical stage (CT)
Histo score (excision biopsy)

17
Q

Cat lung tumor prognostic variables

A

HISTOLOGIC GRADE
well differentiated is much better
lnn involvement
pleural effusion :(

18
Q

Histiocytic sarcoma

A

bernese MD, Flat coat retriever
malignant tumor of AG presenting dendritic cells
mets to lnn, kidney, liver, cns
surgery and CCNU good px

19
Q

Cranial mediastinal tumor

A

9y dog, 10y cat
mass effect in thorax
caval syndrome
Paraneoplastic syndromes

20
Q

Thymoma PNSs

A

67% have signs

Myasthenia gravis!!

21
Q

Cr mediastinal tumor differentials

A

LSA > thymoma

22
Q

Thymoma classification

A
invasive (cranial vena cava, thoracic wall, pericardium)
Non invasive (well encapsulated)
23
Q

Thymoma work up/staging

A

unremarkable labs
rads - mass effect, pleural effusion, MG
Transthoracic FNA/cytology

24
Q

Thymoma FNA/Cytology results

A

large number of small mature lymphocytes and intermittent mast cells

25
Q

Thymoma Treatment

A
Surgery (GS)
exploratory - invasive or not
avoid cranial vena cava and phrenic nerves
RT - very responsive
Chemo - ineffective
Medical manage MG
26
Q

Thymoma Prognosis dogs

A

good.
Sx > RT
negative factors: young, megaesophagus, histo subtype

27
Q

Thymoma Prognosis cats

A

Excellent

MG is rare in cats

28
Q

Myasthenia Gravis

A

Ab destruction of Ash-receptors at neuromuscular junction

striated m in canine esophagus = megaesophagus