<![CDATA[Bone and Soft Tissue Neoplasms: Appendicular Bone Lesions]]>https://www.bstneoplasms.com/s/bone-tumorshttps://substackcdn.com/image/fetch/$s_!LzdO!,w_256,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2Fd6bd471b-f449-4994-a7ca-020df9f523ff_947x947.pngBone and Soft Tissue Neoplasms: Appendicular Bone Lesionshttps://www.bstneoplasms.com/s/bone-tumorsSubstackSat, 11 Apr 2026 08:09:10 GMT<![CDATA[Case 58: A Milwaukee Shoulder in Mumbai]]>https://www.bstneoplasms.com/p/case58https://www.bstneoplasms.com/p/case58Mon, 23 Mar 2026 13:08:45 GMT

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Case:

66-years old man with gradually progressive pain, without fever in the right shoulder.

MRI showed a destructive arthropathy, as did a CT scan. Neuroarthropathy was ruled out with an MRI cervical spine.

The video describes the findings and the final diagnosis obtained on USG guided aspiration.

Full Video

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]]><![CDATA[Case 57: Hemosiderin Blooming]]>https://www.bstneoplasms.com/p/case57https://www.bstneoplasms.com/p/case57Mon, 16 Mar 2026 01:14:52 GMT

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Case:

23-years old known to have tenosynovial giant cell tumor - the gradient image (lower left image) shows blooming of hemosiderin (green arrows).

The nodular synovitis is T2 dark in the sagittal and axial images. This used to be earlier called pigmented villonodular synovitis (PVNS).

To know more about the tumor.

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]]><![CDATA[Case 56: A Benign Aggressive Tibial Lesion]]>https://www.bstneoplasms.com/p/case56https://www.bstneoplasms.com/p/case56Mon, 09 Mar 2026 00:41:18 GMT

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Case:

25-years old with knee pain.

X-ray shows an osteolytic lesion with a sclerotic rim - this is a benign lesion.

MRI shows marrow edema - this is now a “benign aggressive” lesion.

The lesion is partly T2 dark and shows a lamellated pattern of enhancement and is eccentric juxtamedullary.

A biopsy was done.

The findings are characteristic of chondromyxoid fibroma.

To know more about the tumor.

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]]><![CDATA[COD 180 - Sequestrum, Involucrum, Cloaca]]>https://www.bstneoplasms.com/p/cod180https://www.bstneoplasms.com/p/cod180Sun, 01 Mar 2026 23:52:02 GMT

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Case:

26-years old presented with progressive pain in the left thigh and fever.

The first MRI showed marrow edema with mild periosseous edema and no other pathology. The radiograph 16 days later showed permeative cortical involvement and then a PET was done followed by a CT scan and CT guided biopsy.

The video discusses the case and shows the rapid progressive of disease in 24 days and the evolution of a sequestrum, involucrum and cloaca.

The final diagnosis was Staphylococcus aureus hematogenous osteomyelitis of the femur.

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]]><![CDATA[COD 151 - The Enigmatic Calcaneal Lesion in Diard Area 6]]>https://www.bstneoplasms.com/p/cod151https://www.bstneoplasms.com/p/cod151Thu, 05 Feb 2026 00:44:23 GMT

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Case:

16-years old with an osteolytic lesion in this specific Diard 6 area of the calcaneum.

Is it cyst? lipoma? Does it matter? Are they perhaps part of the same continuum?

The video describes the case and revisits another case -

- to understand all these concepts and the possible etiology of these uniquely situated lesions.

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]]><![CDATA[COD 136 - A Swollen Metatarsal Bone]]>https://www.bstneoplasms.com/p/cod136https://www.bstneoplasms.com/p/cod136Mon, 01 Dec 2025 01:11:22 GMT

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Case:

10-years old girl with a left 1st metatarsal lesion with marrow edema, but no cortical break or extra-osseous soft tissue mass or collection.

A biopsy showed inflammation, ruled out tumor, with no evidence of obvious infection.

A whole body MRI was done to clinch the diagnosis.

The video explains the case and the final diagnosis.

Video

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]]><![CDATA[COD 134 - Epiphyseal Involvement and The Skip Lesion]]>https://www.bstneoplasms.com/p/cod-134-epiphyseal-involvement-andhttps://www.bstneoplasms.com/p/cod-134-epiphyseal-involvement-andMon, 24 Nov 2025 12:59:50 GMT

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Case:

15-yrs old diagnosed with osteosarcoma of the distal left femur.

This video describes the case, the different aspects of staging, specifically why it is important to look for transphyseal spread - epiphyseal involvement and skip lesions in the same bone and how to go about doing this.

Video

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]]><![CDATA[Case of the Day - 094 - 2025 09 01 - Between a Rock and a Hard Place]]>https://www.bstneoplasms.com/p/case-of-the-day-094-2025-09-01-betweenhttps://www.bstneoplasms.com/p/case-of-the-day-094-2025-09-01-betweenTue, 02 Sep 2025 00:32:50 GMT

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Case:

13-yrs old with a proximal tibial, bone forming, aggressive lesion, likely osteosarcoma with one failed biopsy.

What do you biopsy? How? Why?

The video discusses the case and the thought behind the path chosen and the final diagnosis.

Video

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]]><![CDATA[Case 55: Typical or Atypical?]]>https://www.bstneoplasms.com/p/case55https://www.bstneoplasms.com/p/case55Thu, 14 Aug 2025 01:16:17 GMT

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Case:

A 70-years old presented with a slowly growing mass in the right thigh.

An MRI was done.

Eventually a CT guided biopsy was done.

What do you think is the diagnosis?

The answer is up

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]]><![CDATA[Case of the Day - 084 - FAVA]]>https://www.bstneoplasms.com/p/case-of-the-day-084-favahttps://www.bstneoplasms.com/p/case-of-the-day-084-favaWed, 13 Aug 2025 01:15:42 GMT45-yrs old with a 15-yrs history of pain and swelling along the medial aspect of the elbow, without contracture or restriction of movement

MRI shows a typical appearance that is characteristic of FAVA, a newly introduced term.

The video explains the diagnosis and shows another similar case..

Video

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]]><![CDATA[Case 53: A Throbbing Finger]]>https://www.bstneoplasms.com/p/case53https://www.bstneoplasms.com/p/case53Tue, 06 May 2025 13:24:15 GMT

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Case:

A 60-years old presented with a 2-years history of throbbing pain in the distal phalanx of the thumb.

MRI

What do you think is the diagnosis?

The answer is up.

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]]><![CDATA[Lecture: Infection Mimics]]>https://www.bstneoplasms.com/p/lecture04https://www.bstneoplasms.com/p/lecture04Mon, 17 Feb 2025 00:46:52 GMT

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Lecture:

This is a lecture I gave on 15th Feb 2025 at an Orthopedic Infections conference.

It discusses common mimics of osteomyelitis in the appendicular skeleton including tumors with and without marrow edema, CNO and fractures. Many of these cases have already been discussed on this site.

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]]><![CDATA[Case 51: Long Femur Disease]]>https://www.bstneoplasms.com/p/case51https://www.bstneoplasms.com/p/case51Thu, 16 Jan 2025 01:03:06 GMT

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Case:

A 22-year old presented with pain and swelling in the right thigh for a month with a history of fall 3 weeks prior to the symptoms.

X-ray
MRI
CT

What do you think is the diagnosis?

The answer is up

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]]><![CDATA[Case 49: Femoral Levels]]>https://www.bstneoplasms.com/p/case49https://www.bstneoplasms.com/p/case49Wed, 23 Oct 2024 00:28:47 GMT

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Case:

A 5-years old presented with pain and swelling in the left distal thigh.

X-ray
MRI
CT scan

A biopsy was done. These histopath images are from another similar patient.

Histopath from another similar patient

What do you think is the diagnosis?

The answer is ready. Please view the video.

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CT Chest Review

https://www.ctchestreview.com/case104/

]]><![CDATA[Case 48: Surface Growth]]>https://www.bstneoplasms.com/p/case48https://www.bstneoplasms.com/p/case48Wed, 25 Sep 2024 00:49:15 GMT

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Case:

A 25-years old had ankle pain. X-rays and MRI were done.

X-ray
MRI

A biopsy was done.

Histopath

What do you think is the diagnosis?

The answer is here. The video discusses the case, the differentials, the diagnosis and other differentials with multiple examples.

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]]><![CDATA[Case 47: The Hole in the Calcaneum]]>https://www.bstneoplasms.com/p/case47https://www.bstneoplasms.com/p/case47Wed, 28 Aug 2024 00:18:47 GMTIndex & Table of Contents

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Case:

A 24-years old had mild pain in the heel.

Lateral radiograph of the heel
MRI

What do you think is the diagnosis?

The answer is here. 5 minutes video discussing the case and the differentials and the pathology.

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]]><![CDATA[Lecture: Approach to Cartilage Tumors]]>https://www.bstneoplasms.com/p/lecture03https://www.bstneoplasms.com/p/lecture03Mon, 29 Jul 2024 13:11:46 GMTIndex & Table of Contents

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Lecture:

This is a short lecture on how to diagnose and approach cartilage tumors, mainly central cartilage tumors.

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]]><![CDATA[Copy 46: A Scapular Enigma]]>https://www.bstneoplasms.com/p/case46https://www.bstneoplasms.com/p/case46Sat, 15 Jun 2024 06:40:43 GMTIndex & Table of Contents

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Case:

A 61-years old lady treated for carcinoma cervix 3 years ago, presented with a long-standing history of gradually progressive pain in the right upper back.

What do you think is the diagnosis?

X-ray
MRI
PET/CT
Color Doppler

What is the diagnosis?

The answer is up. This is a YouTube video.

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]]><![CDATA[Case 45: Shoulder in Ruin]]>https://www.bstneoplasms.com/p/case45https://www.bstneoplasms.com/p/case45Wed, 15 May 2024 00:08:43 GMTIndex & Table of Contents

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Case:

A 53-years old person presented with pain and swelling in the left shoulder.

X-ray
MRI - T1W coronal
CT scan - coronal, axial, sagittal
PET/CT

What do you think is the diagnosis?

The answer is up

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]]><![CDATA[Case 44: A Quintessential Proximal Tibial Lesion]]>https://www.bstneoplasms.com/p/case44https://www.bstneoplasms.com/p/case44Mon, 22 Apr 2024 13:19:24 GMTIndex & Table of Contents

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Case:

This 36-years old presented with pain in the knee for 2 months.

X-rays
MRI
CT
Histopath

What do you think is the diagnosis?

The answer and discussion video.

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