Cutaneous epithelial neoplasms can originate from any of the epithelial structures present in the skin and are classified based on the cell of origin and presence or absence of squamous…

•  Neutrophilic •  Macrophagic •  Eosinophilic •  Lymphocytic •  Mixed (in the absence of a prevalent cell type) The recognition of the inflammatory pattern helps the pathologist to restrict the list of differential diagnoses and…

Clinical features •  Relatively common in dogs, less frequent in cats. •  Age: most commonly seen in adult animals. •  They can occur in any location, but most commonly arise on the head…

Neoplasms included in this group originate from different cell lines, but have been historically grouped all together as they share similar cytological features. Round cell tumours include: •  Mast cell tumour…

2.1 Materials •  Needles (21–25G) and syringes (2–10 ml) for fine-needle sampling of cutaneous and subcutaneous masses with/without aspiration. •  Cotton swabs, ideally dampened with saline, for swab sampling. •  Glass slides, possibly…

Skin metastases of non-primary skin tumours are extremely rare in dogs and cats and only sporadic cases have been reported in the literature. In certain cases, cutaneous metastases may be…

5.1 Main Components of the Skin and Subcutis Epidermis The epidermis is mostly composed of keratinocytes. It also contains melanocytes, Langerhans cells (histiocytes) and pressure-sensing Merkel cells. It is formed…

A correct approach to slide examination is considered crucial for an appropriate interpretation of cytological samples and to reduce the chances of missing important details. A poor and superficial examination…