Case of the Week Answers
Answers to Case of the Week From 11/12/17
History: Rectal CancerWhat is the MRI sequence? What is most important to tell the surgeon
What is the MRI sequence? High Res T2 weighted image perpendicular to the rectal axis.
What is most important to tell the surgeon based on the MRI findings? Ill definition of the rectal wall consistent with a T3 tumor.
Answers to Case of the Week From 11/5/17
History: Breast cancer. Left pubic symphysis lesion.
What is the most likely diagnosis? How would you manage this patient?
Probably a benign pubic symphyseal subchondral cyst related to degenerative change with slight growth over 6 years.
How would you manage this patient?
Followup CT scan or MRI to check for continued stability.
6 years ago
Answers to Case of the Week From 10/29/17
History: Difficulty Swallowing.
What are the studies?
CT scans, Ultrasound, Iodine-123 scan
What is the most likely diagnosis?
Ectopic thyroid tissue.
Answers to Case of the Week From 10/22/17
What are the studies?
Tagged Tc99m-RBC scan and CT scan
What is the most likely diagnosis
Hyperemia likely related infectious or inflammatory colitis (Activity in the right upper quadrant is stationary)
Answer to Case of the Week From 10/15/17
1. What are the studies?
- Pyp scans 2. CT scan without contrast
2. What is the diagnosis?
transthyretin-related cardiac amyloidosis
Answer to Case of the Week From 10/8/17
1. What are the studies?
- Gallium Scan 2. Oral Sulfur Colloid 3. CT scan of the chest at the level of the shoulders. 4. Right shoulder plain film
2. What is the presumptive diagnosis? What is the management?
Given a positive gallium scan at the right shoulder with negative right shoulder CT scan and negative right shoulder series with a history of shoulder pain consider early septic joint/osteomyelitis of the right shoulder.
3. What is the management?
Recommend MRI for confirmation of diagnosis if lower clinical suspicion. Alternatively, can tap the joint if there is continued high clinical suspicion.
Answer to Case of the Week From 10/1/17
Findings: Edema within the hamstring musculature consistent with a muscle strain/partial muscle tear
Answer to Case of the Week From 9/24/17
Scan type: Indium 111 labeled octreotide scan
Findings: Left hepatic lobe lesion on first two images (6 months ago) is more intense on the next two images (today) and corresponds to a hepatic lesion on CT scan
Final Diagnosis: Interval progression of carcinoid liver metastasis.
Answer to Case of the Week From 9/17/17
First two images on the left- 3 months ago, round oil cyst with almost imperceptible walls at the lower inner quadrant
Two images on the right- New thickening and irregularity of the walls of the oil cyst- likely an infected oil cyst.
Management- Can followup in 3 months to check for interval resolution. BIRADS-3
Answer to Case of the Week From 9/10/17
Findings: Bright T2 dark signal instead of the normal T2 dark signal near the plantar fasica insertion site at the plantar calcaneus with thickening. Abnormal thickening on T1 weighted imaging.
Diagnosis: Full thickness plantar fascia tear
Answer to Case of the Week From 9/3/17
Findings: Meniscal chondrocalcinosis with relatively increased osteophytosis and joint space narrowing at the patellofemoral joint.
Diagnosis: Most likely CPPD (Calcium Pyrophosphate Deposition Disease). Also, consider atypical osteoarthritis.
Answer to Case of the Week From 8/27/17
Radiopharmaceutical: Gallium-68 Dotatate (Similar mechanism of action to octreotide)
Diagnosis: Normal variant uptake in the pituitary. Unremarkable Ga-68 Dotatate PET-CT Scan
Answer to Case of the Week From 8/20/17
Enhancing infiltrative hepatocellular carcinoma (HCC). In this case, there was abnormal arterial enhancement at the periphery of the liver.
Gallium is often warm or hot at the site of HCC. In this case, it was of similar uptake compared to the remainder of the liver.
Answer to Case of the Week From 8/13/17
(Right Image) New Right Iliacus Retroperitoneal Hemorrhage
Answer to Case of the Week From 8/6/17
Leftmost study: CT scan with subtle sclerotic lesion at the left ischial tuberosity
2nd to left study: Bone scan showing a cortically active left ischial tuberosity lesion likely corresponding to the CT scan findings
Three right most studies: Axumin PET-CT showing left inguinal adenopathy and no Axumin active lesion corresponding to the sclerotic lesion on PET
Even though the lesion on Axumin lesion is not active, it is still highly suspicious for a bone metastasis give the positivity on bone scan. Axumin is not reliable as a predictor of bone metastases and sclerotic bone lesions if negative (less active than blood pool). These lesions on if not active on Axumin and seen on CT scan should be treated with caution and worked up further!!!
Answer to Case of the Week From 7/29/17
Right adnexal dermoid. Pelvic kidney.
Answer to Case of the Week From 7/22/17
Narrowing/stricture from duodenitis/duodenal ulcer
Answer to Case of the Week From 7/15/17
Non displaced glenoid fracture. Here is the film showed previously and the MRI confirmation.
Answer to Case of the Week From 7/8/17:
Right inguinal hernia with entrapped small bowel causing small bowel obstruction