Shared Flashcard Set

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Surgery Case Files
Cases 31-35
138
Medical
Professional
09/05/2012

Additional Medical Flashcards

 


 

Cards

Term
What are some complications associated with acute pancreatitis?
Definition
hemorrhage,necrosis, fluid collection, infection, splenic vein thrombosis, pseudocyst, abscess; systemic complications= pulmonary, cardiac, and renal dysfunction
Term
T/F Amylase and lipase correlate with the severity of pancreatitis.
Definition
false
Term
During hospital stay, a pt with pancreatitis should be monitored for what complications?
Definition
distant organ dysfunction including respiratory insufficiency, renal insufficiency, cardiac dysfunction, and neurologic dysfunction, rapid loss of lean body mass
Term
When does infected pancreatic necrosis occur after pancreatitis?
Definition
within the first few weeks of onset
Term
How do you treat infected pancreatic necrosis?
Definition
operative debridement
Term
When after pancreatitis onset does a pancreatic abscess occur?
Definition
3 to 6 weeks after onset
Term
How do you treat pancreatic abscess?
Definition
surgical drainage
Term
When does infected pancreatic psuedocyst occur after onset of pancreatitis?
Definition
more than 6 weeks after onset of severe pancreatitis
Term
What percent of pancreatitis is mild versus severe?
Definition
85% are mild and selflimited; 15% are severe and complicated
Term
What characterizes mild pancreatitis?
Definition
edema of the pancreas is characterized by edema of the pancreas and rarely proceeds to necrosis or infection
Term
What is severe pancreatitis?
Definition
necrosis of the pancreas and may be complicated by infection
Term
How often is severe pancreatitis complicated by infection?
Definition
50%
Term
Whatcauses intravascular volume loss in pancreatitis?
Definition
increased microvascular permeability
Term
What are teh most important elements in preventing multiple organ failure in pancreatitis?
Definition
fluid resuscitation and intensive monitoring
Term
How many ranson criteria do you need to have more severe disease and an increased risk of complications?
Definition
3
Term
What can be used to determine prognosis in patients with pancreatitis?
Definition
ranson criteria, APACHE II, CRP (all have similar sensitivity and specificity)
Term
When should contrast enhanced CT be performed?
Definition
if the diagnosis of pancreatitis is in question or in pts who do not improve clinically in 3 to 5 days or who have severe pancreatitis based on teh Ranson score (to determine necrosis)
Term
What are the Ranson criteria on admission?
Definition
WBC >16,000; Glucose >200, Age >55, AST >250, LDH >350
Term
What are the Ranson criteria two days later?
Definition
hematocrit fall of 10%; calcium <8, BUN increas of 5, fluid requirement of >6L, Base excess of >4; PO2 <60
Term
What imaging should all pts with pancreatitis get?
Definition
U/S of gallbladder for stones
Term
Initial treatment of acute pancreatitis is nonoperative and focuses on...
Definition
fluid resuscitation, pain management, maintenance of ventilation, adequate oxygenation, and renal perfusion
Term
What should you do for a pt with pancreatitis with N/V?
Definition
gastric decompression
Term
What percent of pts with pancreatitis improve after supportive measures?
Definition
85%
Term
Name an antibiotic that is effective in penetrating the pancreatic tissue?
Definition
imipenem/cilastatin
Term
What is the managment of a pt with biliary pancreatitis?
Definition
abdominal U/S on admission and daily monitoring of LFTs; if total bilirubin does not decrease pt should undergo ERCP to clear duct of stones; need cholecystectomy before or soon after discharge
Term
T/F Feeding pts with pancreatitis causes pain associated with acinar stimulation and further injury and destruction of the gland.
Definition
false; acinar stimulation does not exacerbate the injury and that the pain that some pts experience is not associated with worsening of pancreatitis
Term
Why is glycemic control indicated in pancreatitis?
Definition
help prevent infections
Term
What arethe indications ofr operative debridement and drainage in pts with pancreatitis?
Definition
infected pancreatic necrosis and clinical deterioration in pts with sterile necrosis; in chronic pancreatitis= intractable pain, bowel or biliary obstruction, and persistent pseudocysts
Term
What characteristics of nipple discharge are concerning?
Definition
spontaneous, being bloody or blood tinged, unilateral
Term
Do solitary papilloas increase the risk of breast cancer?
Definition
no
Term
What are the four most common causes of bloody nipple discharge?
Definition
intraductal papilloma, duct ectasia, carcinoma and infection
Term
squamous carcinoma of the nipple is called...
Definition
bowen disease
Term
What is the most common reason for nipple discharge?
Definition
pregnancy
Term
What tests should you perform if you suspect infection and/or mastitis or abscess of the breast?
Definition
gram stain and culture of discharge; complete blood count
Term
Describe the appearance of galactorrhea?
Definition
bilateral milky white discharge
Term
At what prolactin level can you start to see a prolactinoma with MRI?
Definition
around 100 ng/mL
Term
What medications can cause galactorrhea?
Definition
pts taking phenothiazines, metoclopramide, oral contraceptives, alpha methyldiphenylalanine, reserpine, or TCAs
Term
Name some causes of galactorrhea.
Definition
pituitary prolactinoma, medications, hypothyroidism
Term
T/F Fibrocystic change varies with the menstrual cycle.
Definition
true
Term
Describe the discharge that is typical with fibrocystic change?
Definition
yellow, brown, or green
Term
What are the tests you should use to evaluate a nipple discharge you suspect to be due to fibrocystic change?
Definition
hemoccult test; u/s is helpful in delineating cystic lesions and fibroglandular tissue; mammogram may be appropriate
Term
What tests can be used for intraductal papilloma?
Definition
ductogram; ultrasound may be helpful during workup
Term
Describe the nipple discharge associated with diffuse papillomatosis?
Definition
serous rather than bloody discharge; often involves multiple ducts more distant from the nipple and can be bilateral
Term
T/F Diffuse papillomatosis is associated with an increased risk of breast cancer.
Definition
true
Term
What tests are useful in diagnosing diffuse papillomatosis?
Definition
ductogram to identify duct system; needle localization following ductogram may assist in excision; ultrasound may be helpful during workup
Term
Why is a hemoccult test useful for discharge characteristic of fibrocystic change?
Definition
occasionally the discharge of fibrocystic changes can be difficult to delineat from old blood; however this drainage is rarely spontaneous
Term
Which is better, a cytologic examination of the drainage or a ductogram?
Definition
ductogram because cytologic exam has false negative and false positive results and can cause further delay and cost without adding any useful data
Term
What must a patient have in order to justify performing a ductogram?
Definition
ongoing discharge
Term
What is the significance of an abnormal ductogram?
Definition
means surgical biopsy is necessary
Term
How are breast ducts excised?
Definition
duct is cannulated with a fine lacrimal probe used as the guide for excision; methylene blue dye is injected into the duct with a fine angiocatheter and may also serve as a guide in directing the excision whichis done through a circumareolar incision
Term
What percent of patients with nipple discharge without an associated breast mass have breast cancer?
Definition
4-6%
Term
In a patient with nipple discharge, what other features of the history and exam increase their risk of it being cancer?
Definition
associated mass; postmenopausal pt
Term
In patients with bilateral severe carotid artery stenosis, which side should be operated on first?
Definition
the side producing symptoms
Term
What is the leading cause of disability in adults?
Definition
stroke
Term
Stroke is ranked as the # ___ cause of death.
Definition
3
Term
T/F As a general rule, the more severe the stenosis of a carotid artery, the higher the incidence of symptoms.
Definition
true
Term
What other tests besides ultrasound can be done to evaluate for CEA?
Definition
magnetic resonance angiogram, conventional carotid angiogram, or a CT reconstruction angiogram; an additional workup fora patient with carotid disease should include a thorough assessment of cardiopulmonary risks
Term
What were the results of the NASCET trial?
Definition
for pts with symptomatic carotid stenosis >70%, the 5 year stroke risk was 24% for conservative therapy and 7% for CEA
Term
What were the results of the ACAS trial?
Definition
pts with asymptomatic carotid stenosis >60%, the five year stroke risk was 11.1% for conservative therapy and 5.5% for CEA
Term
To apply the findings of the ACAS and NASCET data, the complication rate must be...
Definition
5% or less for symptomatic patients; 2% or lessfor asymptomatic patients
Term
What surgical techniques can be used to reduce risk of perioperative stroke with CEA?
Definition
intraluminal shunt, cerebral monitoring, and a patch angioplasty
Term
How long is the average hospital stage after CEA?
Definition
majority are home after 24 hrs
Term
What recent advancement has improved the short term safety of carotid artery stenting?
Definition
cerebral protection devices during the procedure that trap embolic debris
Term
What types of patients should be considreed for CAS over CEA?
Definition
those iwth previous neck radiation or recurrent stenosis
Term
What were the results of the SAPPHIRE trial?
Definition
patients with more than 80% asymptomatic stenosis and more than 50% symptomatic stenosis and high risk operative profiles were randomized to stenting versus endarterectomy and it appears that there is no significant difference acording to a 3 year followup
Term
In a patient with stroke, when is the highest risk of a second stroke?
Definition
during the first 6 months following the first event
Term
What are the two most common severe complications following carotid CEA?
Definition
acute MI and stroke
Term
What symptoms seem like they might be caused by cerebral ischemia but in fact are almost never caused by cerebral artery stenosis?
Definition
dizziness, syncope, and confusion
Term
When should cough be further evaluated in smokers?
Definition
if it is new and persistent
Term
What percent of patients with lung cancer have multiple primaries?
Definition
less than2%
Term
What percent of nodules found incidentally on CXR are cancers in pts who are smokers?
Definition
70%
Term
If a mass looks like it could be a pneumonia, what should you do?
Definition
treat with 10 to 14 day course of antibiotics with mandatory radiographic examination on completion; presistence of the mass demands further evaluation
Term
What are the tests you can use to further workup an incidental nodule found on CXR?
Definition
contrast chest CT, PET imaging, sputum cytologic studies, transthoracic FNA, bronchoscopic boipsy, and surgical resection
Term
How do you manage pts with an incidental finding of pulmonary nodule who are high risk for lung cancer?
Definition
some form of biopsy or surgical resection
Term
Is PET with CT useful for evaluating pulmonary nodules?
Definition
sensitivity for detecting malignancy is 82-100%; specificity is 75-100%; but is less effective for smaller lesions (<1cm) or when concomitant infection is present
Term
Is sputum cytology useful in obtaining a tissue diagnosis for pulmonary nodule?
Definition
establishes a diagnosis in 10 to 15% of cases (higher if lesion is located centrally)
Term
How do you biopsy loung lesions?
Definition
transthoracic FNA for peripheral lesions; bronchoscopic biopsies for central lesions
Term
What kind of advanced imaging can you get to further evaluate an incidental nodule found on CXR?
Definition
CT with IV contrast including liver and adrenals to assess for metastasis
Term
What are the five most common sites of metastasis for lung cancer?
Definition
contralateral and ipsilateral noninvolved lung, liver, adrenals, bone and brain
Term
What is T1 for lung cancer?
Definition
a tumor that is less than or equal to 3 cm; surrounded by pleura, no evidence of invasion proximal to a lobar bronchus on bronchoscopy
Term
What is a T2 for lung cancer?
Definition
a tumor more than 3 cm or a tumor of any size that either invades the visceral pleura or has associated atelectasis or obstructive pneumonitis extending to the hilar region. On bronchoscopy involves the lobar bronchus or at least 2 cm distal to the carina. any associated atelectasis or obstructive pneumonitis must involve less than the entire lung
Term
What is T3 for lung cancer?
Definition
a tumor of any size with direct extension into the chest wall (including superior sulcus tumors), diaphragm, or mediastinal pleura or pericardium without involving the heart, great vessels, trachea, esophagus, or vertebral body, or a tumor in the main bronchus within 2 cm of the carina without involving the carina, or associated atelectasis or obstructive pneumonitis of the entire lung
Term
What is T4 for lung cancer?
Definition
a tumor of any size with invasion into the mediastinum or involving the heart, great vessels, trachea, esophagus, vertebral body or carina or with the presence of malignant pleural or pericardial effusion or with satellite tumor nodules within the ipsilateral primary tumor lobe of the lung
Term
What is N1?
Definition
metastasis to lymph nodes in teh peribronchial or ispilateral hilar region or both, including direct extension
Term
What is N2?
Definition
metastasis to ipsilateral mediastinal lymph nodes and subcarinal lymph nodes
Term
What is N3?
Definition
metastasis to contralateral mediastinal lymhp nodes, contralateral hilar lymph nodes, ipsilateral or contralateral scalene, or supraclavicular lymph nodes
Term
What is stage IA lung cancer?
Definition
T1, N0, M0
Term
What is stage 1B lung cancer?
Definition
T2, N0, M0
Term
what is stage IIA lung cancer?
Definition
T1, N1, M0
Term
What is stage IIB lung cancer?
Definition
T2, N1, M0
T3, N0, M0
Term
What is stage IIIA lung cancer?
Definition
T3, N1, M0; T3, N2, M0; T1, N2, M0; T2, N2, M0
Term
What is stage IIIB lung cancer?
Definition
T4, N0,1,2, or 3
T1, N3
T2, N3
T3, N3
Term
What is stage IV lung cancer?
Definition
any T, any N, M1
Term
How do you stage small cell lung cancer?
Definition
can have limited disease, extensive disease or extrathoracic metastasis; if discovered at an early stage you can use the TNM staging system
Term
What are the paraneoplastic syndromes associated with small cell lung cancer?
Definition
EatonLambert, hypercalcemia, Cushings, SIADH, paraneoplastic cerebellar degeneration
Term
What tests should you get before lung cancer resection to test pts physiologic reserve?
Definition
pulmonary function testing and sometimes exercise oxygen consumption studies; smoking cessation for at least 2 weeks is mandatory and pulmonary function can be improved dramatically with thissingle intervention
Term
What is the treatment for small cell lung cancer?
Definition
limited disease treated with combo chemo and radiation therapy; extensive disease is offered palliativechmo with radiation reserved for symptomatic relief only
Term
What is the minimum necessary criteria to remove pulmonary metastasis?
Definition
local control of the primary tumor, metastatic disease confined to the lung parenchyma, disease that is resectable, and adequate pulmonary reserve to tolerate the process
Term
What is the five year survival rate for resection of pulmonary metatastasis if the minimum necessary criteria are met?
Definition
5 year survival rates approximate 30%
Term
Can you screen for lung cancer?
Definition
screening with sputum cytology or by CXR isn't sensitiveenough but there is an ongoing trial involving screening of high risk patients using CT scans
Term
When can you resect lung cancer?
Definition
stage I or II disease with adequate pulmonary function testing
Term
What is the primary purpose of getting a CT scan of chest masses found on CXR?
Definition
to determine anatomic location of the lesion
Term
What percent of patients with lung cancer present with symptoms versus incidental finding on CXR?
Definition
95% with symptoms; 5% with asymptomatic chest findings
Term
What is the most common presenting symptom of lung cancer?
Definition
cough (75% present with cough)
Term
What percent of patients with lung cancer have paraneoplastic syndromes and what types of cancer are they associated with?
Definition
10-20% are affected by paraneoplastic syndromes; mostly small cell and squamous cell
Term
What clinical presentation suggests malignant extrahepatic biliary obstruction?
Definition
painless jaundice with a palpable nontender gallbladder (courvoisier sign), weight loss and new onset diabetes type II
Term
What is the best initial test if you suspect malignant extrahepatic biliary obstruction?
Definition
U/S to look for cholelithiasis, choledocholithiasis, etc. then CT to further differentiate between extrinsic compression and stricture and to stage the tumor
Term
What makes a pancreatic tumor no longer resectable?
Definition
absoulute contraindications= if it invades the SMA, presence of distant metastasis
relative contraindications= involvement of the superior mesenteric vein or a portal vein by tumor
Term
How do you treat pancreatic cancer?
Definition
surgical resection if possible with adjuvant chemotherapy either before or after surgery
Term
Name some common periampullary tumors?
Definition
pancreas, distal bile duct (cholangiocarcinoma), duodenum, and ampulla of Vater; less commonly= mucinous cystic tumors of the pancreas and pancreatic lymphoma
Term
What is a pancreaticoduodenectomy?
Definition
operation involving resection of the duodenum, head of the pancreas, the common bile duct, and sometimes the distal stomach
Term
When is pancreaticoduodenectomy indicated?
Definition
pts with tumors and benign disease located in the area surrounding the ampulla of Vater
Term
What is a whipple resection?
Definition
classic form of pancreaticoduodenectomy
Term
What is teh operative mortality and complication rate of pancreaticoduodenectomy?
Definition
0-2% mortality; 20-40% complication rate
Term
Name the new chemotherapy agent that appears to prolong the survival of patients with pancreatic carcinoma and other periampullary carcinomas?
Definition
gemcitabine
Term
What is gemcitabine?
Definition
deoxycytidine analogue that is effective for periampullary carcinomas and radiation sensitizer, so sometimes given in conjunction with external beam radiation therapy
Term
What percent of cancers are pancreatic? How many cancer deaths are due to pancreatic cancer?
Definition
2%; 5% (or fourth leading cause of cancer death)
Term
What percent of pancreatic cancers are located in the head of the pancreas?
Definition
70%
Term
What are common clinical manifestations of carcinoma in the head of the pancreas?
Definition
obstructive jaundice, weight loss, diabetes mellitus, abdominal pain, and gastric outlet obstruction
Term
How do patients with tumors in the body or tail of the pancreas typically present?
Definition
after tumor growth has caused obstruction or chronic pain from splanchnic nerve invasion
Term
What symptoms indicate advanced disease and a worse prognosis of pancreatic cancer?
Definition
significant weight loss and chronic abdominal and/or back pain
Term
What is the next step after CT imaging demonstrates a mass in teh head ofthe pancreas?
Definition
some people say CTguidedbiopsy to confirm diagnosis and initiate chemoradiation therapy; others say laparoscopy folloed by open exploration and resection if the tumor looks resectable
Term
In patients who undergo neoadjuvant therapy, what percent eventually undergoes resection?
Definition
1/3
Term
What is T1 for pancreatic cancer?
Definition
primary tumor limited to pancreas and measures less than 2cm in diameter
Term
What is T2 pancreatic cancer?
Definition
primary tumor limited to the pancreas and measures more than 2 cm in diameter
Term
What is T3 pancreatic cancer?
Definition
primary tumor involvesthe duodenum, bile duct, or peripancreatic tissue
Term
What is T4 pancreatic cancer?
Definition
primary tumor involves the stomach, colon, or adjacent vessels
Term
What is stage 1 pancreatic cancer?
Definition
T1-T2, N0, M0
Term
What is stage II pancreatic cancer?
Definition
T3, N0, M0
Term
What is stage III pancreatic cancer?
Definition
T1-T3, N1, M0
Term
What is stage IVa pancreatic cancer?
Definition
T4, N0-N1, M0
Term
What is stage 4B pancreatic cancer?
Definition
any T, any N, M1
Term
T/F The majority of patients with pancreatic carcinoma have unresectable disease at thetime of diagnosis.
Definition
true
Term
What is the prognosis of pancreatic cancer with unresectable disease?
Definition
months to 1-2 years
Term
How can you palliate pts with obstructing pancreatic cancer?
Definition
placement of a biliary stent or percutaneous and/or operative approaches to facilitate biliary drainage
Term
What percent of patients with pancreatic cancer develop gastric outlet obstruction and how do you palliate that?
Definition
10-20%; creation of internal bypass (gastrojejunostomy)
Term
How do you paliate severe, persistent abdominal and back pain seen in pts with pancreatic cancer?
Definition
some have good resutls with the injection of alcohol ito the celiac plexus during abdominal exploration or percutaneous celiac injections for nonoperative patients
Term
T/F The presence of ascites is a contraindication to resection of pancreatic cancer.
Definition
true; ascites likely indicates poor hepatic reserve or disseminated cancer
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