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In this section we have spot diagnoses posted on a daily basis since June 2010, now over 1700! You can review the archived cases and read the suggested diagnoses by users and the final comment by Dr Uma Sundram, the Editor-in-Chief and main spot diagnosis host. Case are uploaded each week day by 10 a.m. UK time with the correct diagnosis will generally be posted at 8 p.m. UK time. Why not view the most recent spot diagnosis and proffer a diagnosis?

Case Number : Case 2197 - 9 November 2018 Posted By: Dr. Richard Carr

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
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F70. Finger nodule. ?Giant cell tumour


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Alex-Ventura-Leon

Posted

Desmoplastic fibroblastoma is my spot. 

Fibroma of tendon sheat (hyalinized) is in the differential

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Stroma is collagenous and myxoid. I think it's a superficial acral fibromyxoma. 

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Hypovascular collagenous and focally myxoid tumor. Upper extremity. Not zonal pattern of fibroma of tendon sheath. Agree with Alex: Desmoplastic Fibroblastoma. 

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Kseniya Korchagina

Posted

Сollagenous fibroma/Desmoplastic Fibroblastoma

 

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Dr. Richard Carr

Posted

It appeared to be arising from tendon so I favoured a fibroma of tendon sheath.

I find these "bland" spindle / collagenous lesions a challenge and don't pretend to be correct! Maybe Raul will comment.

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Raul Perret

Posted

Differentiating desmoplastic fibroblastoma and fibroma of tendon sheath is sometimes difficult and sonewhat arbitrary. In general fibroma of tendon sheath tends to be deep and attached to tendons (usually from the hands and fingers),  lobulated and more vascularized than desmoplastic fibroblastoma. I tend to discuss this in my reports mainly when dealing with hydrid lesions. Anyway, these lesions are completely benign so I do not sweat a lot when signing them out. 

In this particular case, due to topography and the prominent blood vessels I would favour fibroma of tendon sheath. 

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