Bovine granulomatous lymphadenitis
However other possible ethiologies are to be included in the differential diagnosis:
|
Histopathology |
Other diagnostic tests |
|
| Bovine Tuberculosis |
Necrotizing granulomatous lesions, with mineralization. |
Ziehl-Neelsen's stain. |
| Bacterial Granuloma: Rhodococcus equi Nocardia spp. Actinomyces spp. Other... |
Necrotizing-pyogranulomatous type lesons (with a significant suppurative componenet). Presence of bacterial colonies. |
Gram stain. |
| Fungal granuloma |
Necrotizing-pyogranulomatous type lesons. |
Fungal culture. |
| Neoplasia |
Presence of tumor cells. |
A. Characteristic granulomatous lesions in the mediastinal lymphnode. B. Culture medium with growth of colonies of Mycobacterium bovis. C. Granulomatous lesions characteristic of tuberculosis. D. PCR positive results to M.tuberculosis complex.
A: Tracheobronchial lymphnode with miliary granulomatous lesion, compatible with tuberculosis. In the microbiological culture Nocardia spp. was isolated B: Pyogranulomatous lesion characteristic of a bacterial infection.
Granulomatous lesion in the lymphnode. In the microbiological culture Rhodococcus equi was isolated.
Tracheobronchial granulomatous lymphadenitis in a 12 months old cattle. Histopathology showed the presence of fungal hyphae.
Retropharingeal lymphnode with metastasis of a squamous cell carcinoma.
