A Case of Malignant Melanoma Arising From an Acquired Agminated Melanocytic Naevus

Corradin, Maria Teresa; Alaibac, Mauro; Fortina, Anna Belloni

doi:10.2340/00015555-0256

Cited by 11 publications

(8 citation statements)

References 8 publications

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“…f). In two cases, MM occurred within the involved segment, while in another case, BN were also present . One patient also had an ipsilateral achromic naevus .…”

Section: Blue Naevi Spitz Naevi and Common Acquired Melanocytic Naevimentioning

confidence: 88%

Melanocytic naevi clustered on normal background skin

Torchia

2015

Clin Exp Dermatol

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Several types of maculopapular melanocytic naevi can occur in a multiple form, and be arranged in a nonrandom fashion on the skin. The most frequently reported segmentally grouped naevi are lentigines. Two types of segmentally arranged lentigines probably exist. The first is associated with neurofibromatosis (NF)1 or NF1 signs, features scattered light-brown lesions and can be considered a type of mosaic NF1. By contrast, non-NF1 associated lesions are characterized by densely packed, dark lesions, and can be defined as 'non-NF1 checkerboard-arranged lentigines'. Blue naevi, Spitz naevi and common acquired melanocytic naevi can occur, clustered in an agminated (or cannonball) shape. However, if large enough, they always follow a checkerboard pattern. Hence, such mosaic conditions should be termed 'checkerboard-arranged blue naevi', 'checkerboard-arranged Spitz naevi' and 'checkerboard-arranged common acquired melanocytic naevi'. Segmentally arranged dysplastic melanocytic naevi probably represent a mosaic form of dysplastic naevus syndrome. Dysplastic melanocytic naevi confined to a cutaneous segment could be defined as 'isolated segmental dysplastic naevus syndrome', while segmentally arranged dysplastic melanocytic naevi co-occurring with widespread, nonsegmental dysplastic melanocytic naevi might configure a 'superimposed segmental dysplastic naevus syndrome'. Small congenital melanocytic naevi are always grouped along Blaschko lines. The only other instances following Blaschko lines are the so-called 'linear lentiginous naevus' and a unique case of multiple deep penetrating naevi.

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“…f). In two cases, MM occurred within the involved segment, while in another case, BN were also present . One patient also had an ipsilateral achromic naevus .…”

Section: Blue Naevi Spitz Naevi and Common Acquired Melanocytic Naevimentioning

confidence: 88%

Melanocytic naevi clustered on normal background skin

Torchia

2015

Clin Exp Dermatol

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“…The nevus spillus usually presents as lentigo simplex on the histological analysis whereas agminated nevus generally shows a junctional or compound melanocytic nevus. 9 …”

Section: Introductionmentioning

confidence: 99%

“…The first one, published by Corradin et al , described the development of an invasive melanoma in an acquired agminated nevus that appeared after thermal and solar burn. 9 Most recently Rezze et al reported the case of a patient affected by atypical mole syndrome and with personal history of melanoma who presented an agminated nevus on the anterior chest since puberty. 10 Some nevi within the agminated lesion presented clinical and dermoscopic criteria of atypic nevus.…”

Section: Introductionmentioning

confidence: 99%

Congenital agminated melanocytic nevus - case report

Rocha¹,

Grazziotin

Rey

et al. 2013

An. Bras. Dermatol.

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Agminated nevus is a cluster group of melanocytic nevi confined to a localized area of the body. There are many pigmented lesions described in the literature as agminated, such as blue nevi, multiple lentigines and Spitz nevi, but only a few cases of congenital agminated melanocytic nevi have been described. We report a case of a male child who presented with congenital agminated nevi, emphasizing the importance of physical examination, dermoscopy, histopathological evaluation, differential diagnosis and follow up to rule out the possibility of dysplastic or malignant changes.

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“…Since melanoma arising from acquired agminated melanocytic nevi has been described5 and the patient is relatively young, long-term follow-up for any malignant change as well as development of background pigmentation is warranted.…”

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confidence: 99%