title: Fibrolipoma of a cryptorchid testis in a young bull.
abstract: A six-month-old Japanese Black bull was found to have no left testis in the scrotum. A fist-sized mass was palpated per rectum. Two months later, hCG was injected and blood samples were collected before and after injection. No testosterone response to hCG was observed. On the cut surface of the excised mass, most of the mass was composed of homogeneous adipose-like tissue. The rest of the surface was composed of a well-circumscribed testicular parenchyma-like tissue (18 × 16 × 15 mm). Histology revealed diffusely distributed mature adipocytes and septa of fibrous connective tissue. Neither germ cells nor spermatozoa were observed in the seminiferous tubules. A diagnosis was made of fibrolipoma and aspermatogenesis of the left cryptorchid testis.
authors: Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, 3–18–8 Ueda, Morioka 020–8550, Japan. osawa@iwate-u.ac.jp
authors: Takeshi
authors: T
authors: Osawa
authors: Moe
authors: M
authors: Miura
authors: Norio
authors: N
authors: Yamagishi
authors: Danil
authors: D
authors: Kim
authors: Naruhiko
authors: N
authors: Fukuda
authors: Hiroyuki
authors: H
authors: Fukuoka
authors: Jun
authors: J
authors: Sasaki
authors: Masanobu
authors: M
authors: Goryo