Luteinizing follicular cyst in a dog

Luteinizing follicular cyst in a dog
History: Tissue from an 11 month old female Great Dane.  The tissue was removed during a routine spay surgery and submitted for histopath due to abnormal appearance.
Ovary:  In each section examined there are primary follicles present in a fibrovascular stroma.  There are two normal corpora lutea present consisting of a large solid [...]

Interstitial Cell Tumor in a dog

Interstitial Cell Tumor in a dog
History:  The testicles from an 11 year old male German Shepherd were submitted for histopathology after castration. The dog had been showing signs of feminization and endocrine disease such as flank alopecia, pruritis, enlarged mammae, small prepuce, and testicular atrophy.
Histopathology:
Two testicles were submitted for histopathology.
The smaller testicle contains an expansile encapsulated neoplasm composed [...]