AFX - A diagnosis of exclusion
Dermatopathologist Dr Louis Pool,talks through the histology of atypical fibroxanthomas and explains why AFX is a diagnosis of exclusion and why immunohistochemistry is required to get to a definite histological diagnosis.
Dermatopathologist Dr Jill Magee presents a guided microscopy case on erythema nodosum, a type of panniculitis that presents with red bumps, usually on the lower extremities of young patients (10-30 years of age).
Is it really an SCC? How to spot a keratoacanthoma
Dermatopathologist Dr Angus Collins guides the viewer through how to identify a keratoacanthoma under the microscope and how to distinguish this lesion from a well differentiated squamous cell carcinoma (SCC). Examples include both active and regressed keratoacanthomas as well as SCCs.
The lichenoid reaction pattern
Dermatopathologist Dr Blake O'Brien presents a guided microscopy session exploring the histological features of the lichenoid reaction pattern including the changes that occur associated with keratinocyte apoptosis. The demonstration includes examples of neoplastic and inflammatory conditions including benign lichenoid keratosis and lupus.
Two cases of leukocytoclastic vasculitis, also known as hypersensitivity vasculitis, are presented by Dermatopathologist Dr Jill Magee. Inflammatory changes are described and the myriad of causes are considered.
The mysterious lentigo
Do you know the true meaning of lentigo? It is one of the most nebulous terms in dermatopathology, used for a variety of lesions including melanocyctic and non-melanocytic, malignant and benign. Dermatopathologist Dr Jill Magee clarifies the confusion surrounding the mysterious lentigo and presents a number of cases for consideration including solar lentigo, lentigo simplex, lentigo maligna and dysplastic lentiginous naevus.
Synonymous terms used by clinicians include dermatitis and eczematous dermatitis to describe spongiotic dermatitis. Dermatopathologist Dr Blake O'Brien talks about the histologic features that define dermatitis as spongiotic and discusses some of the common causes.
Squamous cell carcinoma
Squamous cell carcinomas (SCCs) are the second most frequently diagnosed carcinoma, behind BCCs. Dermatopathologist Dr Fiona Lehane reviews cases to provide details of various SCC features and explores the use of ancillary stains used to assist in the diagnosis of differentiated, moderately differentiated and poorly differentiated tumours.