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 [...]

Pituitary Adenoma in a dog

History: A 9.5 year old female, spayed, mixed breed dog with progressive paresis.
Gross Findings: Pituitary mass
Grossly the tumor appears hemorrhagic and more invasive than compressive but doesnt extend into very far into the thalamus.
Histopathology:
Pituitary: The neoplastic cells are variable in size and shape but do occasionally form follicles with eosinophilic colloid (PAS positive). [...]