Spot Diagnosis Flashcards
Solar lentigo:
A flat, well-circumscribed patch. Colour varies from skin-coloured, tan to dark brown or black, and size varies from a few millimetres to several centimetres in diameter. Solar lentigines are found on sun-exposed sites, particularly the face or hands.
Ink Spot Lentigo (aka Reticulated Lentigo).
Fewer in number compared to Solar Lentigines
Follows sunburn in very fair skinned individuals
(NB: Lentigo is a pigmented flat or sightly raised lesion with a clearly defined edge. Plural-Lentigines)
Lentigo Simplex
The most common form of Lentigo and may be present at birth or develop in early childhood.
Not associated with sun exposure
Round/Oval shaped macule 3-15mm diameter
Jagged or smooth margin
Symptomless, i.e. not painful or itchy
Distinguished from freckles by their darker colour and scattered distribution. Do not darken or increase in number on sun exposure, as do freckles.
Junctional Naevus
Has groups or nests of naevus cells at the junction of the epidermis and the dermis. A flat mole.
Compound naevus
Has nests of naevus cells at the epidermal-dermal junction as well as within the dermis. A central raised area surrounded by a flat patch.
Atypical melanocytic naevus
A mole with unusual features.
Often shortened to “atypical naevus”.
Can be defined as a mole with at least 3 of the following features.
Size > 5 mm diameter
Ill-defined or blurred borders
Irregular margin
Varying shades of colour (mostly pink, tan, brown, black)
Flat and bumpy components.
Lichenoid Keratosis
Inflammatory reaction arising in a regressing existing solar lentigo or seborrhoeic keratosis.
AKA benign lichenoid keratosis, solitary lichen planus, lichen planus-like keratosis and involuting lichenoid plaque. They are one of the causes of atypical solar lentigo.
Dermoscopy-Uniform clusters of grey dots and, depending on the stage of the lesion, may show signs of an original pre-existing lentigo or seborrhoeic keratosis.
Atrophie Blanche
Pattern often seen in scars on the lower leg
Dysplastic Naevus
Melanoma
Melanoma
Melanoma
BCC
Arrows indicate Dots
Benign Naevus
Plantar Naevus
Cherry Angioma
Solar Lentigo
Compound Naevus
Cellular Naevus
Seborrhoeic Keratosis
Seborrhoeic Keratosis
Demonstrates asymmetry of colour or structure in one or two axes
Melanoma in Situ
Demonstrates asymmetry of colour or structure in one or two axes
Congenital Naevus
Demonstrates asymmetry of colour or structure in one or two axes
Invasive Melanoma
Demonstrates asymmetry of colour or structure in one or two axes
BCC
Demonstrates asymmetry of colour or structure in one or two axes
Lentigo Simplex
Demonstrates asymmetry of colour or structure in one or two axes
Lentigo simplex is the most common form of lentigo. A single lesion or multiple lesions (lentigines) may be present at birth or develop in early childhood. Is not induced by sun exposure, not associated with any medical diseases or conditions. It is also referred to as simple lentigo and juvenile lentigo.
Plantar Naevus
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Atypical naevus due to the presence of streaming
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Atypical naevi due to the asymmetry and presence of 3 different colours.
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Atypical naevus due to asymmetry and multifocal pigment distribution.
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Spitz Naevus
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Spitz Naevus
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Seborrhoeic Keratosis
Exophytic (arising from outer surface) Papillary Structure
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Seborrhoeic Keratosis
Blood vessels can be prominent in some seborrhoeic keratoses, tending to arise as tiny hairpin shaped capillaries surrounded by a halo within a lobule.
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Seborrhoeic Keratosis
Starry and Cloudy Milia like cysts
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Seborrhoeic Keratosis with Brown dots
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Seborrhoeic Keratosis
Irregular Structures
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Seborrhoeic Keratosis, irritated lesion
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Seborrhoeic Keratosis, Tanning cream in krypts
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Seborrhoeic Keratosis
Globule like structures
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Seborrhoeic Keratosis with Milia like cysts
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Seborrhoeic Keratosis with Cerebriform pattern
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Seborrhoeic Keratosis, with indistinct structure
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Seborrhoeic Keratosis with ‘fat fingers’
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Seborrhoeic Keratosis with finger-print like structures
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Seborrhoeic Keratosis with multiple colours
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Seborrhoeic Keratosis with multiple colours
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Seborrhoeic Keratosis with Blue-grey Globules
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Seborrhoeic Keratosis
Irregular Crypts (recesses or tubes extending down from the skin surface)
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Seborrhoeic Keratosis with Horny cysts
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Seborrhoeic Keratosis
Fissures/Ridges
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Seborrhoeic Keratosis
Black Seb K
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Seborrhoeic Keratosis
Brown lesion
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Seborrhoeic Keratosis
Skin-coloured lesion
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Seborrhoeic Keratosis
Pink Lesion
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Seborrhoeic Keratosis
White lesion
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Pigmented BCC with focal ulceration
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Non-Pigmented BCC
Bluish Hue, Scale and Ulceration
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Non-Pigmented BCC
Superficial BCC
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Non-Pigmented BCC
Cystic BCC, Polarised View showing crystalline structures
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Non-Pigmented BCC
Cystic BCC, Non-Polarised View
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Non-Pigmented BCC
White Nodule, Telangiectasia
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Non-Pigmented BCC
Tiny Ulcers
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Non-Pigmented BCC
Superficial BCC
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Non-Pigmented BCC
Prominent Vasculature
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Non-Pigmented BCC
Vascular BCC
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Non-Pigmented BCC
Crusting, Telangiectasia
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Non-Pigmented BCC
Milia Formation
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Non-Pigmented BCC
Subtle blue colour
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Pigmented BCC
Large Nodule
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Pigmented BCC
Multicoloured lesion
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Pigmented BCC
Deeply pigmented border
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Pigmented BCC
Flecks of Pigment
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Pigmented BCC
Flecks of Pigment
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Pigmented BCC
Arborising Telangiectasia
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Pigmented BCC
Flecks of pigment
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Pigmented BCC
Spoke wheel pigmentation
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Pigmented BCC
Ulceration
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Pigmented BCC
Blue Ovoid Nests
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Pigmented BCC
Arborising blood vessels
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Actinic keratosis.
Likely to be on the body due to it’s prominent keratin (white or yellow scale).
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Actinic keratosis.
Likely to be on the face due to it’s strawberry pattern.
NB: Due to it’s pigmentation, it could be confused for a Lentigo Maligna
Name this skin lesion and where it is most likely to be on the body based on it’s distinguishing features.
Actinic keratosis.
Likely to be on the face due to it’s strawberry pattern.
NB: Due to it’s pigmentation, it could be confused for a Lentigo Maligna
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Actinic keratosis.
Likely to be on the face due to it’s strawberry pattern.
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SCC in situ/Bowen Disease/Intraepidermal Carcinoma.
Purple arrow indicates clusters of glomerular vessels (coiled vessels)
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SCC in situ/Bowen Disease/Intraepidermal Carcinoma.
Purple arrow indicates clusters of glomerular vessels (coiled vessels)
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SCC in situ/Bowen Disease/Intraepidermal Carcinoma.
Purple arrow indicates clusters of glomerular vessels (coiled vessels)
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Deeply pigmented SCC in situ/Bowen Disease/Intraepidermal Carcinoma.
Purple arrow indicates clusters of glomerular vessels (coiled vessels)
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Invasive SCC
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Invasive SCC
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Invasive SCC
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Invasive SCC
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Venous Lake on the Lip
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Cherry Angioma
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Haemorrhagic Lymphatic Malformation
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Haemorrhagic Lymphatic Malformation
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Cherry Angioma
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Cherry Angioma
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Angioma on the lip
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Reactive Haemangioma
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Cherry Angioma
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Cherry Angioma
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Thrombosed Haemangioma
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Haemorrhage within a Seborrhoic Keratosis
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Subungual haemorrhage
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Senile Purpura
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Talon Noir (macro)
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Talon Noir (dermoscopy)
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Talon Noir (dermoscopy)
What lesion is indicated in this clinical sign
Dermatofibroma
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Rainbow pattern dermoscopy of Dermatofibroma
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Dermatofibroma
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Dermatofibroma
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Dermatofibroma
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Dermatofibroma
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Neurofibroma
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Neurofibroma
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Neurofibroma
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Neurofibroma
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Lichenoid Keratosis.
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Lichenoid Keratosis.
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Lichenoid Keratosis.
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Lichenoid Keratosis. Yellow arrows show grey dots.
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Disseminated superficial Porokeratosis
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Follicular plugging in Porokeratosis
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Porokeratosis
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Porokeratosis of Mibelli
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Sebaceous Hyperplasia
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Sebaceous Hyperplasia
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Sebaceous Hyperplasia
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Sebaceous Hyperplasia
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Callus
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Corn
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Plantar wart
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Common wart
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Plane wart
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Common wart
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Epidermal Naevus
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Epidermal Naevus
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Epidermal Naevus
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Accessory Nipple
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Normal areola and naevus
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Normal areola and naevus
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Giant Comedo
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Xanthelasma (no skin opening)
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Large epidermal cyst
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Large epidermal cyst
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Clear Cell Acanthoma
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Clear Cell Acanthoma
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Clear Cell Acanthoma
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Clear Cell Acanthoma
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Trichoepithelioma/Trichoadenoma
Aka Benign hair follicle tumour.
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Trichoepithelioma/Trichoadenoma
Aka Benign hair follicle tumour.
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Trichoepithelioma/Trichoadenoma
Aka Benign hair follicle tumour.
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Lichen Planus (dermoscopy)
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Lichen Planus (macro)
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Psoriasis (dermoscopy)
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Psoriasis (macro)
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Cutaneous Larvae Migrans
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Scabies Burrow
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Scabies Burrow
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Cerebriform pattern
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Finger-like structures
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Comedo-like openings
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Milia-like cysts
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Pigmented BCC with Bizzare Structures
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Pigmented BCC with Spoke wheel areas
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Pigmented BCC with Ulceration (can also be present in Melanomas)
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Pigmented BCC with Multiple blue/grey globules
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Pigmented BCC with Multiple blue/grey/brown globules
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Pigmented BCC with Leaf-like structures
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BCC with arborising vessels
