Journal of Veterinary Clinical Pathology

Question 1

A 6-year-old male lionhead rabbit presented with persistent male behavior despite reported castration. CT revealed a large caudal intra-abdominal mass. Cytology of the aspirate revealed abundant lipid-laden macrophages, vacuolated cytoplasm, and absence of sperm or germ cells. What is the most likely diagnosis?
A) Abdominal liposarcoma
B) Retained testicle with seminoma
C) Cystic adrenal gland hyperplasia

Answer 1

B) Retained testicle with seminoma

Question 2

A 1-year-8-month-old intact female rat presented with a subcutaneous mass on her right lower abdomen and an enlarged axillary lymph node. Cytology from the abdominal mass revealed scattered mesenchymal cells in a hemodiluted background and multinucleated giant cells. What is the most likely diagnosis?
A) Lymphoma
B) Sarcoma
C) Mast cell tumor

Answer 2

B) Sarcoma

Question 3

A 3-year-old female Dwarf rabbit presented with a slowly growing, fluctuant swelling in the left mandibular region. CT showed a cystic lesion that reformed after aspiration. Cytology of clear fluid collected by FNA revealed keratinaceous debris and squamous cells. What is the most likely diagnosis?
A) Abscess
B) Mucocele
C) Dermoid cyst

Answer 3

C) Dermoid cyst

Question 4

A 6-year-old intact male rabbit presented with right testicular enlargement and left testicular atrophy. Ultrasound revealed hypoechoic to anechoic foci, mineralized areas, and abnormal vascularization. What is the most likely diagnosis?
A) Sertoli cell tumor
B) Seminoma
C) Interstitial cell hyperplasia

Answer 4

B) Seminoma