[B] 1.79 Benign epithelial tumors Flashcards Preview

Pathology A - General Pathology > [B] 1.79 Benign epithelial tumors > Flashcards

Flashcards in [B] 1.79 Benign epithelial tumors Deck (8)
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1
Q

Tumours of the epidermis

A

Papilloma

  • Benign epithelial proliferation
  • Exophytic growth
  • Fibrovascular stroma
  • Can be viral/non-viral
  • Cattle/horse
2
Q

Congenital papilloma is seen in which species

A
  • Foal
  • Calf
  • Piglet
3
Q

Oncogenic papillomavirus

A
  • Mostly on irritated skin areas
  • Usually multicentric
  • Usually labial in horses
  • On the head of dogs
  • p53 inhibition due to oncoproteins
4
Q

Oncogenic papillomaviruses: In cattle

A
  • 6 types, 2 subgroups
  • Different localisation for each
5
Q

Oncogenic papillomaviruses: Histopathology

A
  • Orthokeratototic & parakeratotic hyperkeratosis
  • Epidermal hyperplasia
  • Nuclear inclusion bodies
  • Koilocytes: In the upper cell layers of str. spinosum
6
Q

Inverted papilloma

A
  • Benign, endophytic growth
  • Epidermal proliferation
  • Dogs only
  • 1-2 cm diameter in the dermis → Expands to subcutis
  • Little pore on the surface of the lesion
7
Q

Adenoma

A
  • Benign tumour of glandular epithelium
  • Many histologic variations (tubular, lobular)
8
Q

List the benign epithelial tumours

A
  • Papilloma
  • Inverted papilloma
  • Adenoma

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