An unusual case of a mature teratoma on the left perineal region of a young cat: surgical treatment and pathological description

Ober, Ciprian; Taulescu, Marian; Oană, Liviu; Bel, Lucia; Cătoi, C.; Farcas, L.; Peștean, Cosmin

doi:10.1186/1751-0147-55-51

Cited by 6 publications

(6 citation statements)

References 21 publications

(35 reference statements)

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“…On the other hand, mature sacrococcygeal teratoma had a higher gene activation of innate and adaptive immune effectors ( 21 ). In cats, most extragonadal teratomas were mature and benign and could be found anywhere in the body, such as intracranial ( 22 ), retrobulbar ( 1 ), temporal ( 2 ), perineal ( 3 ) of kitten or adult cats (age 4 months to 3 years old) except in the region of coccygeal vertebrae that had a mixture of mature and immature components ( 4 ). However, there was no recurrence observed after years of follow-up in all cases.…”

Section: Discussionmentioning

confidence: 99%

“…The unique feature of this tumor is the presence of multiple embryonic germ layers including ectoderm (hair, teeth, nervous tissue), mesoderm (fibrous or adipose tissue, bone, muscle, cartilage) and endoderm (respiratory tissue, salivary gland). Teratomas commonly occur in an ovary or cryptorchid testicle; however, a few cases of extragonadal teratomas have been reported in cats at retrobulbar, head, perineal and coccygeal areas (1)(2)(3)(4). Based on the histomorphology, it can be subdivided into immature and mature variants, depending on the degrees of differentiation of neoplastic components toward normal tissue structures.…”

Section: Introductionmentioning

confidence: 99%

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Case report: Mature extragonadal teratoma at the proximal part of the tail in a kitten

et al. 2022

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An 8-month-old, intact male, domestic shorthair cat was referred for a mass on the proximal ventral part of the tail which had been found since the animal was born, and due to the presence of a linear fissure with rows of ectopic teeth, the veterinarian suspected that the mass had recently ruptured. Tail amputation was elected and the entire mass was successfully surgically excised. From the gross examination, this mass had an open cyst-like structure with a prominent area composed of hair, teeth, and bone. Histopathology revealed two components of germinal layers including hair follicles, adnexal tissue, neural tissue, teeth, muscle, fat, bone, and lymphatic vessels. The histopathological diagnosis was consistent to mature teratoma. Although, complete excision could not be definitively confirmed histologically, this kitten is currently well and has not developed any recurrent mass at the surgical site after 2 years of post-operation.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Case report: Mature extragonadal teratoma at the proximal part of the tail in a kitten

et al. 2022

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“…Although most gonadal [ 6 ] and extragonadal teratomas [ 12 ] from animals are benign, malignant teratomas have also been recorded [ 17 ]. Histologically, malignant teratomas contain less well-differentiated embryonal elements in addition to mature structures, increased cellular atypia [ 13 ] and numerous mitotic figures [ 17 ].…”

Section: Case Presentationmentioning

confidence: 99%

“…The content of teratomas is complex, reflecting their heterogeneity of germ-cell origin. Neural tissue, woven bone, hyaline cartilage, hair follicles, sebaceous and apocrine glands, respiratory epithelium and adipose tissue have all been reported in animals [ 10 – 12 ]. These histological elements are either seen in associations that resemble normal organs or intermingled haphazardly [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Diagnosis and surgical management of malignant ovarian teratoma in a green iguana (Iguana iguana)

Bel¹,

Tecilla²,

Borza³

et al. 2016

BMC Vet Res

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BackgroundOvarian tumors in reptiles are uncommonly reported in the literature and for green iguanas previously reported cases include teratomas, one adenocarcinoma and one papillary cystadenocarcinoma. The present report is the first of a malignant ovarian teratoma in a green iguana. Complete and detailed pathological features, differential diagnosis and surgical management of malignant ovarian teratoma are discussed in this paper.Case PresentationA 9-year-old intact female green iguana (Iguana iguana) with a clinical history of persistent anorexia and progressive abdominal distension was referred to the surgery department. On physical examination, a presumptive diagnosis of follicular stasis was established. Radiographic evaluation showed a large radioopaque mass within the abdomen, which was visible both in latero-lateral and ventro-dorsal exposures. Abdominal ultrasonography showed a large intra-abdominal mass, with numerous cyst-like structures filled with liquid and a heterogeneous aspect with hypoechoic areas. Exploratory laparatomy was thus suggested and the mass was removed surgically. The histologic findings of the neoplasm were consistent with those of ovarian malignant teratoma. Surgical excision of the mass in our case was considered curative and after a follow-up period of 6 months the animal has recovered completely.ConclusionsA malignant ovarian teratoma has not been previously reported in green iguana and should be included in the list of differential diagnosis of ovarian tumors in this species. This report will contribute to a better understanding of the pathology of this rare tumor in green iguanas.

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“…One case was diagnosed as fibrolipomatous hamartoma in male calf and the two cases were diagnosed as choristoma in female calves (Simon et al 2010;Binanti et al 2012). Perineal teratoma was recorded in young cat (Ober et al 2013). The diagnosis perineal of hamartoma is treacherous, as teratoma exhibits similar entities (Shaul et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Histological and clinical outcome of a novel case of perineal hamartoma, atresia ani, and rectovaginal fistula in female Holestein calf

et al. 2021

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The association of anorectal congenital malformation and perineal mass are extremely rare at veterinary literature. The present report is a novel case of perineal hamartoma, atresia ani, and rectovaginal fistula in female calf, 2-day-old female Holstein Friesian calf. The animal had a fleshy, dark red, trailing perineal mass at the left side, imperforated anus and about 1 cm rectovaginal fistula. Imperforated anus and rectovaginal fistula were surgically corrected. The mass was firm, red in color and contain bean-shaped, white color tissues on cut section. It was misdiagnosed as teratoma, but the careful histological examination revealed disorganized mature fibrovascular tissue, mature adipose tissue, blood vessels, neural tissue. In addition to urogenital epithelium diagnosed as remnants of Mullerian duct, and the mass was diagnosed as perineal hamartoma, associated with atresia ani type II and rectovaginal fistula. To the best of our knowledge, this is the first perineal hamartoma, atresia ani, and rectovaginal fistula in Holestein Friesian calf with proper outcome upon surgical interference.

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An unusual case of a mature teratoma on the left perineal region of a young cat: surgical treatment and pathological description

Cited by 6 publications

References 21 publications

Case report: Mature extragonadal teratoma at the proximal part of the tail in a kitten

Case report: Mature extragonadal teratoma at the proximal part of the tail in a kitten

Diagnosis and surgical management of malignant ovarian teratoma in a green iguana (Iguana iguana)

Histological and clinical outcome of a novel case of perineal hamartoma, atresia ani, and rectovaginal fistula in female Holestein calf

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