A pigmented lesion on a shoulder

A 48-year-old man consulted for this pigmented lesion on his right shoulder.

Dermoscopy revealed:

• an atypical reticular pattern
• structureless areas with regression
• a retiform depigmentation (negative pigment network)

Pathology was in favor of a melanoma in situ.

Small, beware !

A 42-year-old man consulted for this small (4mm) pigmented lesion on his left calf.

Dermoscoy revealed:

• asymmetry of colors and structures
• some irregular blotches
• an atypical pigment network
• a radial streaming

Lesion was excised and pathology was in favor or a melanoma in situ.

Cheek lesion.

A 55-year-old man consulted for a pigmented lesion on his left cheek

Dermoscopy revealed:

• an irregular broadened network
• rhomboidal structures

Pathology was in favor of a lentigo maligna melanoma in situ.

Another back lesion.

A 34-year-old man consulted for a changing pigmented lesion on his back.

Dermoscopy revealed:

• asymmetry
• an atypical reticular pattern
• a regression area

Pathology revealed a melanoma in situ.

Back lesion

A 65-year-old man with many pigmented lesions on his back. One of this lesion was atypical.

Dermoscopy revealed:

• multiple colors
• an atypical reticular network
• regression
• a reticular depigmentation  (rectangle)

Pathology revealed a melanoma in situ.

Thoracic pigmented lesion

Man 52 years old; Acquired pigmented lesion on chest.

Dermoscopy revealed:

• multiple colors
• asymmetry of form and structures
• an atypical network
• a blue white veil
• irregular dots and globules

Pathology revealed a melanoma in situ.

Asymmetric pigmented lesion on a leg

A 25-year-old woman consulted for this pigmented lesion on her right leg.

Dermoscopy revealed:

• asymmetry of color
• atypical reticular network

Pathology was in favor of a melanoma in situ developed on a melanocytic nevus.

A slowly enlarging pigmented lesion

A 32-year-old woman consulted for a pigmented lesion on her left arm. This lesion was slowly enlarging for 3 years.

 Dermoscopy revealed:

• an atypical reticular pattern with a total disorganization
• multiple colors
• signs of regression

 Two punch biopsies were performed.
Pathology was in favor of a melanoma in situ.
Lesion was excised with a 0.5 margin.

Mole with an eccentric pigmentation

A 40-year-old woman consulted for a mole with an eccentric hyper pigmentation.

Dermoscopy revealed:

• an atypical reticular network
• an eccentric dark reticular network
• irregular brown dots

Lesion was excised and pathology revealed a melanoma in situ.

Emerging on a forearm

A 73-year-old man consulted for a pigmented lesion on his right forearm. This lesion was not symmetrical and been recently discovered by patient.

Dermoscopy revealed:

• an asymmetrical pigmentation
• a disorganised and atypical reticular network
• an homogeneous area

This lesion was excised and pathology revealed a superficial spreading melanoma in situ. 

Pigmented lesion on upper lip.

A 32 year-old woman consulted for this pigmented lesion present for 6 months.

Dermoscopy revealed:

• an atypical pseudonetwork
• rhomboidal structures
• irregular globules

A melanoma was suspected and this lesion was excised. Pathology revealed a superficial spreading melanoma in situ (Clark level I).

scalp melanoma

A 65-year-old man consulted for this pigmented lesion on his scalp.

Dermoscopy revealed a disorganised atypical reticular network, blue gray dots and regression, irregular branched streaks.

This lesion was excised and pathology revealed a melanoma in situ.

Melanoma in situ

A 65-year-old woman presented a changing of color and size of one of her nevi. This nevus was localized on her back.

Dermoscopy revealed a central part with aggregated globules and an atypical and asymmetric reticular pattern.

This lesion was excised and pathology revealed a melanoma in situ in association with a dermal nevus.

Asymmetry is one of the most important parameters of melanomas in situ.

Melanoma in situ

A 28-year-old man consulted for a pruritic pigmented lesion of his right shoulder.
Dermoscopy revealed an asymetric pattern with blue-gray globules and focal structureless areas. The lesion was excised and pathology revealed a melanoma in situ.






Other cases of melanoma
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Melanoma in situ

A 68-year-old man presented a pigmented lesion on his back. In dermoscopy the presence of a disorganized and broadened network, and a structureless area on the left side were in favor of a melanoma. The lesion was excised and pathology revealed a melanoma in situ.





Other cases of melanoma
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