At the end of the post you can vote for the right diagnosis!

In a 10 months old Friesian calf a whitish nodule was observed in the muscular tissue of the esophagus.

La flecha señala el nódulo blanquecino encontrado en la musculatura del esófago.

La flecha señala el nódulo blanquecino encontrado en la musculatura del esófago.

What is your diagnosis? (8)

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The histopathological study shows a focal, chronic inflammatory infiltrate consisting of abundant polymorphonuclear eosinophilic leukocytes associated with progressive atrophy and degeneration of myocytes.

 

It is difficult to determine the cause due to the chronicity of the lesion but we can rule out neoplasia or cysticercosis. One of the most likely causes would be a hypersensitivity reaction against Sarcocystis, although protozoan elements have not been spotted in this case.

 

You can see more lesions associated with Sarcocystis in this post: Pyogranulomatous eosinophilic myositis.


Your answers are highlighted below.
Question 1
A
Granulomatous myositis by Cysticercus tenuicollis
B
Eosinophilic myositis by Sarcoystis spp.
C
Granulomatous myositis by Cysticercus bovis
D
Leiomyoma (smooth muscle fiber neoplasia)
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