Histologic features of hair follicle neoplasms and cysts in dogs and cats: a diagnostic guide

Wiener, Dominique J

doi:10.1177/1040638721993565

Cited by 13 publications

(15 citation statements)

References 43 publications

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“…(10,12). Curiously, the follicular tumors in dogs show an important prevalence in the head and neck regions, developing in these same locations described in the human warty dyskeratoma (10,14); however, it should be emphasized that in this present report the lesion occurred in the axillary region.…”

Section: Discussionsupporting

confidence: 48%

Warty Dyskeratoma with involvement of multiple hair follicles in a dog

Silva¹,

Conti²

2023

BJVP

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The warty dyskeratoma is a neoplasm of follicular origin, with uncommon incidence in veterinary medicine, and benign biological behavior. An excisional biopsy sample was received from a dog, female, Shih Tzu, 12 years old, from the left axillary region. Grossly, after section, green and friable multifocal areas were identified, streaked by solid white areas. Microscopically, the analysis revealed multifocal cystic structures, lined by stratified epithelium, with basal area including villous epithelial projections, toward the dermis, and the luminal region featured acantholysis and dyskeratosis, as well as parakeratosis. Those findings were compatible with a warty dyskeratoma affecting multiple hair follicles, thus being the first case report in veterinary medicine with such this unique pattern. Up to now, the literature encompassed only human medicine. This report, besides collaborating to the description of a rare presentation of an uncommon neoplasm, also contributes with new information found for epidemiological studies of this tumor.

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Section: Discussionsupporting

confidence: 48%

Warty Dyskeratoma with involvement of multiple hair follicles in a dog

Silva¹,

Conti²

2023

BJVP

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“…Ribbon or medusoid trichoblastoma. Trichoblastomas are derived from the primitive hair germ of embryonal follicular development (Wiener 2021). These slow-growing, benign tumors occur most commonly in the dog and cat with a predilection for the head and neck region (Goldschmidt & Goldschmidt 2017).…”

Section: Microscopic Findingsmentioning

confidence: 99%

“…Histologically, five subtypes are described: ribbon, spindle, granular cell, trabecular and with outer root sheath differentiation. In all of the subtypes, small clusters of mesenchymal cells may be seen in the stroma close to the epithelial neoplastic cells, resembling dermal papillae (follicular papillary mesenchymal bodies) (Wiener 2021). Histologically, trichoblastomas are composed of small, basaloid keratinocytes arranged in branching and radiating columns, usually 2-3 cells in width (ribbon trichoblastoma) (in Portuguese: tricoblastoma em fita) (Fig.…”

Section: Microscopic Findingsmentioning

confidence: 99%

Shapes of pathology

et al. 2021

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The shape is one of the key features of a lesion and a pathologist must be able to identify and interpret these forms in the context of any gross and microscopic changes. One of the principles of adult learning is to engage the learner with previously understood information. If, when presenting material that is new, a connection with something the student already has familiarity with, the learning process is accelerated. As the learners are already familiar with shapes they have encountered throughout their pre-pathology learning, these can be used to hasten the incorporation and understanding of lesions. This paper describes various shapes that are used in describing lesions in veterinary pathology.

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“…In this tumor, there was a large amount of glycogen-rich epithelium. The outer root sheath of hair follicles has abundant glycogen in the lower isthmus and suprabulbar inferior portions [ 24 ]. And during histogenesis, keratinocytes showed a clear cytoplasm with abundant glycogen deposition [ 10 , 19 ].…”

mentioning

confidence: 99%

A case of immature teratoma with nephroblastic components in the oral cavity of a cat

NAMIKI¹,

OKADA²,

SHINDO³

et al. 2023

The Journal of Veterinary Medical Science

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A 2-month-old female mixed cat was emaciated due to dysphagia, and inspection of the mouth revealed a 2 cm pedunculated mass elongated from the palate, which occupied the oral cavity. The mass was surgically removed, and histopathological examination revealed that the tumor was composed of three germ cell layers: ectodermal (skin and skin appendages), mesodermal (cartilaginous and osseous structures), and endodermal (glandular and respiratory mucosa) tissues. An immature teratoma was diagnosed because of the presence of immature neuroectodermal tissues, and the presence of nephroblastic components was a characteristic finding in this case. This is the first report of an oropharyngeal teratoma in cats and the first case of an immature teratoma with nephroblastic components in a domestic species.

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Histologic features of hair follicle neoplasms and cysts in dogs and cats: a diagnostic guide

Cited by 13 publications

References 43 publications

Warty Dyskeratoma with involvement of multiple hair follicles in a dog

Warty Dyskeratoma with involvement of multiple hair follicles in a dog

Shapes of pathology

A case of immature teratoma with nephroblastic components in the oral cavity of a cat

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