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I had a CT scan for pelvic pain. What does the film indicate?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

My complaint is a pain in the right pelvic area. Could you suggest what the images of my CT film indicate? There are some lesions on my bone. What do they mean? What should be the treatment? I am currently on Amlodipine or Valsartan 2.5/40 mg.

Please help.

Thank you.

Answered by Dr. Vivek Chail

Hello,

Welcome to icliniq.com.

I understand your concern.

Thanks for writing to us, and I have gone through the CT scan images (attachment removed to protect patient identity).

There is a lesion in the right intertrochanteric area that is showing characteristics of an osteoma, which is almost always a benign condition. One must look out for any severe pain and any abnormal bone growth in the area. Many osteomas might disappear with time, and no active treatment is needed. In cases when the pain is severe, then surgery and bone curettage might help.

There is a likely area of excess calcium deposition showing a white spot in the left iliac bone near the left sacroiliac joint area, and it is called a bone island. A bone island is usually not treated. However, to confirm a bone island and to rule out other lesions, a nuclear bone scan can help. The thickening of the left anterior pararenal fascia is likely not significant. The gall bladder is not well visualized.

I hope this helps.

Kindly follow up if you have more concerns.

Thank you.

Patient's Query

Hi doctor,

I heard from a radiologist that the lesion on the intertrochanteric area could either be an osteoid osteoma or a liposclerosing myxofibrous tumor. I will certainly need your advice and go for a bone scan. What does your observation favor between osteoid osteoma versus LSMFT?

Please help.

Answered by Dr. Vivek Chail

Hello,

Welcome back to icliniq.com.

I understand your concern.

By definition, an osteoma is usually smaller than 0.7 inches in size. In your case, the lesion in the intertrochanteric area of the right femur measures 15 mm and fits the definition of an osteoma. Osteoid osteomas are more common in a younger age group, from 10 to 35 years. A central sclerotic dot is seen in many lesions, but not in all lesions.

However, the other differential diagnoses can include LSMFT (liposclerosing myxofibrous tumors), keeping in mind the location and lucent center with sclerotic margins, and it is slightly more common in males aged 30 to 40 years.

Both conditions can cause vague pain and discomfort in the area of the lesion.

Treatment options in both cases are confirmation by biopsy and surveillance. Surgery is a thought only in cases of suspected aggressive activity in the lesion.

In view of the size and the lesion being minimally expansile and a smaller lucent component, I would prefer to go for an osteoid osteoma as the first diagnosis and keep LSMFT as the second diagnosis.

Other less likely differentials for this condition might include fibrous dysplasia, non-ossifying fibroma, polymorphic fibro-osseous tumor of bone, myxofibroma, lipoma, cyst, bone infarct, Paget's disease, and chondroma.

I hope this helps.

Kindly follow up if you have more concerns.

Thank you.

Patient's Query

Hi doctor,

Appreciate the insight. I will be going for a bone scan tomorrow, nonetheless, which I hope will give me a more accurate picture.

Kindly suggest.

Answered by Dr. Vivek Chail

Hi,

Welcome back to icliniq.com.

1. The lesion in the neck of the right femur does not show up on the bone scan and, therefore, is likely confirmed as a benign etiology and does not show any cell activity. A nuclear scan does not specify the exact cause

2. There is moderate uptake in the lower end of the right radius, which can mean that some activity is taking place at the cell level. The results of the bone scan are non-specific and therefore, an X-ray followed by a higher diagnostic radiology imaging like a CT (computerized tomography) scan or an MRI(magnetic resonance imaging) scan might be needed to know in detail about the area.

3. Mild uptake in the medial part of the left iliac bone can be due to the previously mentioned and suspected bone island.

I hope this helps.

Please feel free to reach out in case of further queries.

Thank you.

Patient's Query

Thank you for your thorough review.

I have a couple of questions:

  1. With this one, I am between 2 possible diagnoses- osteoid osteoma and LSMFT. This is the area I seem to be having mild/ moderate pain in, which is relieved by Ibuprofen. Does this report, along with the CT film, help derive a conclusive diagnosis on this? Either OO or LSMFT? If not, what is the best way to conclude? Also, what is your suggestion on the treatment option?
  1. On the bone scan report, it states "in the thoracic case and upper extremities, exam is showing moderate uptake in the region of the distal shaft on the left". Plain film is recommended here. Please advise whether the narration indicated moderate uptake also in the thoracic case? Is the activity taking place on the left forearm or the right forearm? Could you help me identify the exact place on the right or left forearm where the activity is happening?
  1. You have previously suggested that a bone scan might help rule out a bone island vs other lesions. Please advise that a bone island is indeed a final diagnosis. Finally, does any of this (CT + bone scan) indicate any remote chance of a cancerous or malignant lesion that should be of worry?

Thank you.

Answered by Dr. Vivek Chail

Hi,

Welcome back to icliniq.com.

Going by basics, osteooid osteoma almost always shows uptake on bone scan, but LSMFT can show mild uptake on bone scan in some cases. Therefore, I would choose LSMFT as the first possibility over osteoid osteoma. In most cases, treatment is towards pain relief as long as the lesion is not significantly growing on follow-up scans. If pain is severe, then surgery can help. If the pain is tolerable, then please try medicines for 6 to 12 months and then follow up as needed to look for an increase in the lesion. At any time, if the pain gets severe, then a surgical treatment might be indicated.

The thoracic cage is the rib area, and the distal shaft of the left radius is the wrist area. I am not sure if you have had any old injury in the areas or any sort of discomfort or pain due to any low-intensity trauma, such as sports activity. The exact area of activity in the ribs is clearly not mentioned. However, the distal left radius is a bone in the thumb side of the left forearm and wrist area, in simple language.

To me, it looks like a bone island as the activity is mentioned as mild. In a cancerous condition, the activity is significant. However, follow-up imaging of the area may be done in a year, when checking out the femur lesion.

I hope this helps.

Please feel free to reach out in case of further queries.

Thank you.

Patient's Query

Thank you for the reply.

I got an MRI of this area for additional screening. I have shared the MRI images for your reference. Please correlate these images with the CT images that you have in the past, and let me know your opinion.

Thank you.

Answered by Dr. Vivek Chail

Hi,

Welcome back to icliniq.com.

After viewing the MRI images, there is a sclerotic rim with a relatively isointense central area on T1 and hyperintense on T2 STIR images, and no significant bone edema in the right neck of femur lesion. The lesion is not aggressive in nature. Features are more like an LSMFT. Osteoid osteoma is less likely, but cannot be completely ruled out, as you know. The lesion in the left iliac blade is most likely a bone island.

I hope this helps.

Please feel free to reach out in case of further queries.

Thank you.

Patient's Query

Hello doctor,

Thank you for your answer.

I picked up the MRI report today, which indicated the following:

  1. Finding a compatible with the bone island on the left iliac bone.
  2. Tumor on right femur - MRI is suggesting nonossifying fibroma, however, with uncertain etiology.
  3. Prostate gland: There is a diffuse heterogeneity in the peripheral zone, but no discrete prostate lesion is identified. The intrapelvic structures are otherwise unremarkable.

Question for are:

  1. Your review of the previous report is consistent with this MRI report. Based on the 2nd opinion, can we conclude 100 percent with bone island? Or do you suggest an appointment with an orthopedic doctor?
  2. Based on your review of CT images/ MRI images, do you agree or disagree with this lesion being a non-ossifying fibroma? Or do you still stick with LSFMT / or remotely still OO?
  3. What is your take on the prostate gland? It states a diffuse heterogeneity, but otherwise normal.

Thank you.

Answered by Dr. Vivek Chail

Hi,

Welcome back to icliniq.com.

1. I feel the chances of a bone island are almost certain in the left iliac bone area.

2. I shall think of LSMFT due to the imaging characteristics and typical location, and NOF is also among the list of lesions due to the features of a high signal surrounded by low signal. Osteoid osteoma is unlikely, and I will put it lower down in the list.

3. There is an alarm only if we see a T2 hypointense lesion in the peripheral zone of the prostate. An inhomogeneity in the area is not of concern.

I hope this helps.

Please feel free to reach out in case of further queries.

Thank you.

Answered byDr. Vivek Chail

Medically reviewed byDr. Hemalatha

Published At January 18, 2020
Reviewed AtJune 3, 2026

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