EXAM 7 Flashcards
CNS
A middle-aged patient who sustained RTC 6 months ago presents with progressive visual lossand exophthalmos on the right. MRI demonstrated a dilated superior ophthalmic vein withflow voids in the cavernous sinus. What is the likely diagnosis?
A. Buphthalmos
B. Carotid-cavernous fistula
C. Orbital pseudotumour
D. Arteriovenous malformation
E. Dural fistula
B. Carotid-cavernous fistula
Carotid-cavernous fistula (also described as caroticocavernous fistula) is an abnormalcommunication between the internal carotid artery (ICA) and the veins of the cavernous sinus.
It is mostly due to trauma with laceration of the ICA within the cavernous sinus usually due to a skull base fracture or penetrating trauma. Ultrasound and MRI usually show arterial flow in the cavernous sinus and superior ophthalmic vein.
PED
A preterm neonate on the intensive care unit develops gross abdominal distension andbleeding per rectum. A supine abdominal radiograph is performed demonstrating multipleloops of dilated bowel loops.
Given the likely diagnosis, all of the following would be expected findings on the supine radiograph, except:
A. Mottled gas shadows within the bowel wall
B. Branching gas pattern overlying the liver shadow
C. Foci of calcification projected over the renal angles
D. Generalised lucency overlying the liver shadow
E. Rounded area of lucency within the central abdomen
MSK
Which of the following is a recognised cause of a ‘bone within bone’ appearance?
A. Renal osteodystrophy
B. Paget’s disease
C. Hyperparathyroidism
D. Melorheostosis
E. Osteopathia striata
GU
A 25-year-old woman with recurrent urinary tract infections and post-void dribbling attendsthe urology clinic. The urologist suspects a urethral diverticulum. What is the mostappropriate first-line test?
A. Micturating cystourethrogram
B. Urodynamics
C. Transvaginal ultrasound
D. Double balloon catheter positive pressure urethrography
F. Pre- and post void magnetic resonance imaging of urethra
GIT
A 40-year-old male and intravenous drug user, is on your barium list. The history on the cardsays ‘c/o dysphagia. Exclude pouch!’. During the barium swallow, you notice no oesophagealpouch but there are at least three giant 3- to 4 cm flat ulcers noted within the oesophagus near the gastro-oesophageal junction. The intervening oesophagus appears normal. Which of the following is the most likely diagnosis?
A. Cytomegalovirus oesophagitis
B. Caustic oesophagitis
C. Candida oesophagitis
D. Behcet’s disease
E. Crohn’s disease
CVS
A 16-year-old girl with a history of recurrent bronchitis undergoes chest X ray. The lungs are clear but there is tracheal deviation to the left, with a focal indentation of the right wall of the trachea. Underlying vascular anomaly is suspected, and the patient undergoes a magnetic resonance imaging scan for further evaluation. All of the following will explain the above Chest X-ray appearance, except:
A. Double aortic arch
B. Right aortic arch with aberrant left subclavian artery and patent ductus arteriosus
C. Aberrant left pulmonary artery
D. heft aortic arch with aberrant right subclavian artery and patent ductus arteriosus
E. Common origin of innominate and left common carotid artery
CNS
A 50 year-old man was recently diagnosed with a thyroid cancer following an ultrasound guided FNA of a thyroid lesion. Regarding malignant thyroid nodules, which of die following statements is true?
A. Punctate calcification is a feature of papillary carcinoma.
B. Anaplastic carcinoma is associated with MEN syndrome.
C. Echogenic foci seen in medullary carcinoma are due to calcitonin deposits.
D. Characteristic lymphadenopathy in medullary carcinoma is hypoechoic to muscle.
E. Follicular carcinoma can he differentiated from follicular adenoma on US.
CNS
A 6-year-old boy presents with a 1-month history of progressive left-sided proptosis. An orbital MRI reveals a large, lobulated, retro-orbital mass without any intracranial or globe invasion. The mass is isointense to muscle on Tl and hyperintense on T2 with uniform enhancement post-contrast. The patient is afebrile, and inflammatory markers are not significantly raised. What is the most likely diagnosis?
A. Dermoid cyst
B. Orbital cellulitis with abscess formation
C. Lymphangioma
D. Capillary’ haemangioma
E. Rhabdomyosarcoma
MSK
A 30-year-old woman was involved in a severe road traffic accident and sustained direct high-energy trauma to her pelvis. Among other injuries, she was found to have a fracture on her left sacroiliac joint and left ischiopubic ramus. What type of fracture has she sustained?
A. Open book
B. Straddle
C. Bucket handle
D. Duverney
E. Malgaigne
GIT
A patient undergoes a routine abdominal ultrasound for generalised abdominal pain.
Unfortunately, the spleen cannot be detected. Which of the following is the least likely cause for this?
A. Myelofibrosis
B. Sickle cell anaemia
C. Polysplenia syndrome
D. Traumatic fragmentation of the spleen
E. Wandering spleen
CNS
A 6-year-old boy presents with adrenal insufficiency and developmental delay. Magnetic resonance imaging demonstrates diffuse T2 hyperintensity in the deep white matter, most predominant in the posterior parieto-occipital region and splenium of the corpus callosum. Which of the following is the most likely cause for this finding?
A. Metachromatic leukodystrophy
B. Acute disseminated encephalomyelitis
C. X-linked adrenoleukodystrophy
D. Alexander disease
F. Canavan disease
GU
A 26-year-old woman who had an intrauterine contraceptive device (IUCD) coil inserted 6 years ago presents to her general practitioner complaining of right iliac fossa pain, constipation, night sweats and fevers. The practitioner refers her for a transvaginal ultrasound, which shows a right-sided convoluted cobra-shaped structure containing fluid echogenicity and some polypoidal outgrowths from the wall. Adjacent to this is a cystic left adnexal mass containing internal echoes. Which of the following is the likely diagnosis?
A. Actinomycosis
B. Appendix abscess
C. Diverticulitis with pericolic abscess
D. Migrated IUCD causing hydroureter
E. Salpingitis secondary to tuberculosis
CHEST
A 75-year-old man had a history of dyspnoea associated with haemoptysis and weight loss. Computed tomography (CT) showed a 1.5 cm spiculated mass in the anterior segment of the right upper lobe, 5 cm deep to the pleural surface on a background of widespread emphysematous change. The case was referred for discussion at multidisciplinary team meeting to consider safety of undergoing a CT-guided lung biopsy. In this patient’s case, which of the following statements concerning CT-guided lung biopsy is correct?
A. The patient carries a 10%-15% risk of developing pneumothorax.
B. As the lesion is not contiguous with the pleural surface, there is a lower risk of pneumothorax.
C. The patient carries an increased risk of developing pulmonary haemorrhage post-procedure.
D. If a pneumothorax were to develop as a complication, he is less likely to require subsequent intercostal drain insertion.
E. The procedure is relatively contraindicated because pulmonary function tests revealed a forced expiratory volume in 1 second (FEV1) of 45% predicted.
CVS
A 58-year-old man, who underwent coronary artery bypass grafting 8 years ago, presents to the cardiology clinic with symptoms of progressive shortness of breath on exertion, associated with increase in abdominal girth and peripheral oedema. Clinical examination elicits raised jugular venous pressure, with bibasal fine inspiratory crackles, shifting dullness and bilateral ankle pitting oedema. Elective ECG-gated spin-echo cardiac MRI demonstrates limited ability of the right ventricle to distend during filling (diastole), assuming a tubular shape, with limited change in cavity size during the end-systolic phase. Pericardial thickening of 6 mm and calcification is evident, with a moderate pericardial effusion and dilated superior vena cava and azygos vein. Which of the following is the most likely diagnosis?
A. Cardiac tamponade
B. Restrictive cardiomyopathy
C. Constrictive pericarditis
D. Dressier syndrome
E. Hypertrophic cardiomyopathy
GIT
An 8-month-old boy presents with a right upper quadrant mass. Blood results reveal a raised alpha fetoprotein (AFP). Ultrasound of the abdomen demonstrates a large 7-cm, hypervascular, heterogeneous hyperechoic mass in the liver with a few cystic regions.
There is no vascular invasion. No renal or suprarenal lesions are present. Which of the following differential diagnoses is most likely?
A. Hepatoblastoma
B. Infantile haemangioendothelioma
C. Hepatic haemangioma
D. Mesenchymal hamartoma of the liver
E. Fibrolamcllar hepatocellular carcinoma
MSK
What is the purpose of the heel-toe manoeuvre in ultrasound examination of the shoulder?
A. To decrease the beam angle incidence
B. To minimise anisotropy
C. To increase the field of view
D. To minimise posterior reverberation artefact
E. To minimise beam width artefact
GU
A 23-year-old woman presents with left iliac fossa pain. The uterus and both ovaries are within normal limits. There is an anechoic left adnexal cyst adjacent to the uterus that appears separate from the ovary. You note that the patient has had a previous ultrasound for left adnexal pain, and that a left adnexal cyst with similar dimensions was noted then. Which of the following is the most likely diagnosis?
A. Theca lutein cyst
B. Paraovarian cyst
C. Endometrioma
D. Adenomyosis
E. Dermoid cyst
GIT
A patient undergoes pancreatic transplantation. Which of the following statements is least likely?
A. The transplanted pancreatic duct is normally dilated.
B. Indistinct pancreatic margins on ultrasound may indicate graft rejection.
C. Most patients have a simultaneous renal transplant
D. The donor pancreas is normally grafted onto the external iliac vessels.
E. Most patients achieve insulin independence.
GU
A 30-year-old woman presents with bilateral foot drop 2 days post-partum. What finding on MRI would explain this?
A. Posterior disc protrusion at L3/L4
B. Bilateral common peroneal nerve entrapment
C. Bilateral sciatic nerve compression
D. Paracentral disc protrusion at L3/L4
E. Spinal canal stenosis at L3/L4
PED
On an antenatal ultrasound, a foetus is found to have an intracranial anomaly. At birth, the cranial ultrasound reveals a large cystic mass in the posterior fossa communicating with the fourth ventricle with hypoplasia of the cerebellar vermis.
What other associated abnormality would you not expect to be associated with the underlying condition?
A. Subependymal calcification
B. Corpus callosum agenesis
C. Grey matter heterotopia
D. Schizencephaly
E. Occipital encephalocoele
MSK
A 13-year-old boy presents with symptoms and radiographic evidence of a slipped capital femoral epiphysis (SCFE). It is noted on his radiographs that the physes are generally wide with flaring of the metaphyses. Which of the following is the most likely diagnosis?
A. Rickets
B. Hypophosphatasia
C. Blounts disease
D. Achondroplasia
E. Renal osteodystrophy
GU
A 76 year-old woman is having a pelvic magnetic resonance imaging (MRI) scan to assess for a possible hernia. She is noted to have a 6 cm very low intensity lesion within the right ovary on both Tl and T2. Some fluid is also noted within the pelvis. Which of the following is the most likely diagnosis?
A. Ovarian mucinous cystadenoma
B. Krukenberg tumour
C. Ovarian fibroma
D. Dermoid cyst
E. Clear cell carcinoma of the ovary
CHEST
You are reviewing the X-rays of a 44-year-old male patient who has complained of mild breathlessness and a cough but otherwise well. Several chest radiographs performed over an 18 month period demonstrate diffuse ground glass shadowing with several scattered confluent areas of air-space consolidation. The lung changes do not appear to have any zonal predilection, and no mediastinal, hilar or cardiac abnormality is evident. HRCT also showed fairly extensive smooth interlobular septal thickening.
The intervening lung appears normal, and there is sharp demarcation between the abnormal and normal lung parenchyma. Which of the following is most likely given the radiological findings described?
A. Pulmonary vasculitis
B. Pulmonary oedema
C. Primary tuberculosis
D. Alveolar proteinosis
E. Extrinsic allergic alveolitis
GIT
An otherwise healthy 44-year-old patient presents acutely unwell with new-onset epigastric pain and is found to have a significantly raised amylase level. Which of the following clinical scenarios is least likely?
A. Alcoholic patient, recent 48-h binge
B. Previous bouts of right upper quadrant abdominal pain
C. Recent flu like symptoms
D. Computed tomography report describing a 6 cm pseudocyst
E. Fulminant haemolytic-uraemic syndrome
GU
A 73-year-old woman with weight loss, previous history of endometriosis and a CA-125 of 983 μg/mL, attends for an magnetic resonance imaging (MRI) scan of the pelvis after a cystic mass with nodules was noted in the left adnexa on ultrasound. There is a 6 cm predominately unilocular cystic mass in the left adnexa, which is bright on T1W & T1W fat-saturated images with enhancing solid mural nodules along its wall. It remains high signal on fat-saturated imaging. Which of the following is the most likely diagnosis?
A. Dysgerminoma
B. Brenner tumour of the ovary
C. Endometrioma
D. Ovarian dermoid
E. Clear cell carcinoma of the ovary
CNS
A 32-year old lady presents with acute sudden onset headache to the A&E department. CT shows haemorrhage within the fourth ventricle. Which vessel is most likely to be involved?
A. Anterior cerebral communicating artery
B. Anterior cerebral artery
C. Posterior cerebral artery
D. Posterior cerebral communicating artery
E. Posterior inferior cerebellar artery
CVS
A 4-year-old child undergoes a CXR for suspicion of chest infection. The request mentions that the child has a congenital cardiac anomaly, which is, as yet, untreated. No further information regarding the type of anomaly is provided. The only abnormalities you can detect on the CXR include mild generalised cardiomegaly and increased pulmonary arterial flow. You note from the A&E department notes that the child is not cyanosed. What is the most likely diagnosis?
A. Ebstein anomaly
B. Ventricular septal defect
C. Tetralogy of Fallot
D. Atrial septal defect
E. Truncus arteriosus
MSK
An elderly patient presents to the orthopaedic clinic with progressive hip pain. He has a history of a hip replacement performed 5 years ago. A radionuclide bone scan is ordered and demonstrates increased uptake around the proximal aspect of the prosthesis. This finding is sensitive and specific for which of the following conditions?
A. Prosthetic fracture
B. Mechanical loosening
C. Periprosthetic fracture
D. Particle disease
E. None of the above
GIT
A 68-year-old male patient presents with painless jaundice. Abdominal ultrasound reveals both intrahepatic and extrahepatic biliary dilatation. The gallbladder is thin walled and there are no gallstones. No other significant abnormality is detected, but the report mentions that ‘… the pancreas was not visualized due to overlying bowel gas What is the most likely underlying diagnosis?
A. Pancreas divisum
B. Pancreatic acinar cell carcinoma
C. Pancreatic adenocarcinoma
D. Pancreatic islet cell tumour
E. Pancreatic pseudocyst
CHEST
A 55-year-old man presents with a several-week history of worsening stridor. He has had several chest infections over recent months, with repeated courses of antibiotics providing little relief of symptoms. Mediastinal lymph adenopathy is evident on chest radiograph, with a few intrapulmonary nodules in the periphery of both lungs. Computed tomography confirms the presence of multiple nodules, most numerous in the subpleural region of the right lower lobe. Also of note is a mucosal polypoid lesion in the upper trachea and a further endobronchial lesion just distal to the carina in the right main bronchus. Which condition encompasses these clinical and radiographic findings?
A. Amyloidosis
B. Alveolar proteinosis
C. Pulmonary vasculitis
D. Histoplasmosis
E. Hydatid disease
CVS
A neonate is noted to be markedly cyanosed, worsening when she cries. A CXR performed on day 1 is normal. Which of the following types of congenital cardiac anomaly is most likely?
A. Patent ductus arteriosus
B. Ebstein anomaly
C. Coarctation of the aorta
D. Tricuspid atresia
E. Tetralogy of Fallot
CNS
Pick’s disease affects which of the following?
A. Fronto-parietal lobe
B. Temporo-parietal
C. Temporo-frontal
D. Parieto-occipital
E. Frontal
MSK
A 36-year-old woman is being investigated for possible renal stones with CT KUB.
An incidental “polka-dot” appearance to the T12 vertebral body is noted on the axial CT images. MRI at the same level shows characteristic high signal in the vertebral body on Tl and T2W images. All of the following statements regarding this entity are true, except
A. They may extend to involve the posterior element.
B. They are commonly multiple.
C. Compressive lesions are common in the lumbar spine.
D. Low T1W lesions are more likely to be active.
E. Most are asymptomatic.
GIT
An alcoholic patient is referred for an ultrasound from the A&E department of your hospital. The request states that the patient has deranged liver function tests and raises the possibility of underlying liver cirrhosis. Which of the following findings would not help you to confirm this diagnosis?
A. Caudate lobe hypertrophy
B. Increased echogenicity of the liver parenchyma
C. Coarse echotexture to the liver
D. Decreased resistive index in hepatic artery
E. Hepatofugal flow within the portal vein
GIT
A 53-year-old man is assessed by the receiving surgeon, having presented with severe chest pain, vomiting and sepsis. Mediastinal emphysema is evident on chest radiograph and
computed tomography confirms oesophageal perforation. Which of the following statements is incorrect with regard to this condition?
A. Plain chest radiography is normal in approximately 10% of cases.
B. Iatrogenic injury is the most common single cause of oesophageal perforation.
C. Upper oesophageal perforations typically result in right-sided pleural collection.
D. In blunt chest trauma, the perforation usually occurs in the lower third of the oesophagus.
E. Water-soluble contrast agents should be used for fluoroscopic assessment.
CHEST
A normally well 8-year-old child presents to the A&E department short of breath and pyrexial complaining of joint pain. Chest X-ray shows an enlarged heart with upper lobe venous blood diversion and small bilateral pleural effusions. No focal collapse/consolidation is evident, but there are patchy interstitial infiltrates in a perihilar distribution. Further questioning reveals that the child recently had a sore throat. What is the most likely underlying diagnosis?
A. Toxic synovitis
B. Juvenile rheumatoid arthritis
C. Reiter’s disease
D. Rheumatic fever
E. Septicaemia
CNS
All the following cause basal ganglia calcification except?
A. Pseudohypoparathyroidism
B. Lead poisoning
C. Ageing
D. Hypothyroidism
E. Wilson’s disease
GU
An 82-year-old woman presents with postmenopausal bleeding. Transvaginal ultrasound shows a thickened endometrium and a left adnexal lobulated multicystic lesion, which has some solid elements. Some of the cysts contain fluid-fluid levels and have thick septa. Which of the following is the most likely diagnosis?
A. Endometriosis
B. Granulosa cell tumour
C. Endometrial hyperplasia and haemorrhagic corpus luteal cyst
D. Serous cystadenocarcinoma
E. Fibrothecoma
MSK
A 33-year-old woman with progressive increase in back pain and perineal pain was sent for further evaluation to the spinal surgeons. Axial and coronal reformatted O’ image showed a well-defined lytic lesion of the right upper part of the sacrum with extension through the right sacroiliac joint and absence of a sclerotic rim. All the following arc features of this lesion except?
A. Most commonly affected bone is sacrum.
B. Extension into intervertebral disc helps to differentiate GCT from ABC.
C. Septa show intense enhancement post-contrast injection.
D. Doughnut sign on scintigraphy usually suggests an alternate diagnosis.
E. Fluid-fluid level is not specific for this lesion.
GU
A 38-year-old woman is undergoing investigations for infertility. She is otherwise asymptomatic. On hysterosalpingography, there is a large filling defect within the uterine fundus with a linear defect that extends into the filling defect. She subsequently has an MRI scan, which demonstrates a myometrial mass with indistinct margins, which abuts the junctional zone and has lower signal on T2 when compared with the adjacent myometrium. There are a few focal high T2 signal intensity areas within, some which
appear more linear. It demonstrates less enhancement than its adjacent myometrium.
Which of the following is the most likely diagnosis?
A. Leiomyosarcoma
B. Leiomyoma
C. Endometrial carcinoma
D. Adenomyosis
E. Hydatidiform mole
GIT
Before being referred for a CT colonography, a patient asks to speak with a radiologist to clear up a few points regarding colon cancer; Of the following statements, which is most correct?
A. Smaller polyps are more likely to be malignant than larger ones.
B. Most colonic polyps are malignant.
C. Gardener syndrome carries an increased risk of cancer but Peutz-Jeghers syndrome does not.
D. Most colon cancers start as an adenomatous polyp.
E. Inflammatory bowel disease carries no increased risk of cancer.
GIT
A 75-year old man presents with abdominal pain after eating and mesenteric angina is suspected. You decide to perform a celiac axis angiogram using a mechanical contrast pump. What is an appropriate volume and flow rate of contrast to use?
A. 32 mL @ 8 mL/s
B. 20 mL @ 20 mL/s
C. 40 mL @ 20 mL/s
D. 30 mL @ 20 mL/s
E. 20 mL @ 6 mL/s
GU
A 62-year old postmenopausal woman has a magnetic resonance imaging (MRI) scan to look for a hernia. In the right ovary is a 1 cm sharply demarcated low T1 and T2 signal solid mass with adjacent calcification. There is also a multilocular cystic lesion within the same ovary, containing multiple thin-walled septa. Which of the following is the most likely cause of the well-demarcated low-signal lesion?
A. Ovarian fibroma
B. Ovarian Brenner tumour
C. Ovarian dermoid cyst
D. Endometrioma
E. Corpus luteal cyst
MSK
Which of the following is specific for osteomalacia?
A. Brown tumour
B. Looser zones
C. Cloaca
D. Cyclops lesion
E. Wimberger’s sign
MSK
AP radiograph of the leg of a 3-year-old girl shows periosteal reaction in the mid-fibula. Exuberant periosteal reaction was worrisome for malignancy, and MRI was performed. Coronal STIR images showed a low signal intensity fracture line surrounded by extensive soft tissue and bone marrow oedema. No mass was depicted. Other sites commonly affected in toddlers fracture include all the following, except:
A. Tibia
B. Humerus
C. Talus
D. Calcaneum
E. Cuboid
CNS
A 63-year old man presents with progressive vertical gaze abnormality and cognitive symptoms. MRI of the brain demonstrates volume loss of the mid brain, which was described by the reporting radiologist as Hummingbird sign. What is the diagnosis?
A. Multisystem atrophy
B. Progressive supranuclear palsy
C. Parkinson’s disease
D. Shy-Drager syndrome
E. Amyotrophic lateral sclerosis
GIT
A patient is diagnosed with Helicobacter pylori infection. Which of the following findings would you not expect?
A. Gastric ulcer
B. Duodenal ulcer
C. Linitis plastica
D. Polypoid gastritis
E. Thickened gastric folds
CVS
You performed a catheter angiogram and angioplasty for right popliteal stenosis on a patient in the vascular ward and are there to review him the following day. The nurse asks you to prescribe him some analgesia because, overnight, his limb has become painful and pale with loss of power and intolerable tingling. Which of the following is your next step?
A. Review the puncture site (you find no significant haematoma) and prescribe analgesics
B. Arrange for the patient to be taken back to the suite for further angiography
C. You immediately page the vascular surgeon on call
D. Organise urgent CTPA to exclude pulmonary embolism
E. You start the patient on low molecular weight heparin and organise US leg veins