A 41-year-old woman with a complex congenital nevus that possessed features of both a blue nevus and a nevus of Ota is described. She was found to have melanotic hyperpigmentation of the underlying subcutaneous tissue and dura mater. Two separate melanomas developed in the tissues underlying her nevus (one in the subcutaneous tissue and another intracranially, arising from the dura).

REFERENCES 1. Trattner A, Metzker A. Partial unilateral lentiginosis. J Am Acad Dermatol 1993;29:693-5. 2. González-Sixto B, Flórez A, De la Torre C, Cruces M. Bilateral segmental lentiginosis associated with malignant melanomas. J Eur Acad Dermatol Venereol 2008;22:1262-3. 3. Kang HY, Kang WH. Bylateral type of nevus of Ota presenting as agminated lentigines. Eur J Dermatol 2003;13:205-6. 4. S...

The article by Shapiro et al., which summarizes a survey of respondents on the words or phrases they use to identify the melanocytic nevus described by Clark et al. in 1978, shows that over 70% of The American Society of Dermatopathology (ASDP) members and nearly 85% of The American Academy of Dermatology (AAD) members preferred one of the following phrases: ‘‘dysplastic nevus’’, ‘‘nevus with a...

BACKGROUND Patients diagnosed with primary cutaneous melanoma have a greater lifetime risk of developing further melanomas. Most of these melanomas appear to arise de novo, but a proportion of them develop in pre-existing melanocytic nevi. OBJECTIVE To determine risk factors associated with the development of a second cutaneous melanoma arising on a nevus in patients diagnosed with cutaneous ...

Becker nevus syndrome is a phenotype characterized by the fundamental presence of Becker's nevus with ipsilateral hypoplasia of the breast or other skin, skeletal and/or muscular disorders. This syndrome generally originates at birth, intensifies significantly in adolescence and is one of the syndromes that constitute epidermal nevus syndrome. To the best of our knowledge, this is the first cas...

BACKGROUND Deep penetrating nevus (DPN) is a distinct variant of melanocytic nevus and remains a histopathologic challenge to pathologists because of its resemblance to blue nevus, malignant melanoma, pigmented Spitz nevus, and congenital melanocytic nevus. It often goes unrecognized due to its relative rarity. CASE PRESENTATION Here we report a case of DPN of the left anterior leg in a 51-ye...

We present a case of hair follicle nevus, a rare hamartoma composed of vellus hair follicles. Hair follicle nevus should be differentiated from accessory auricle, trichofolliculoma and hair nevus.

Nevus of Ota is a dermal melanocytic nevus seen predominantly in females. It is uncommon in India. Its association with nevus of Ito, another dermal melanocytic nevus, is extremely rare. We report this rare association in a male patient, which is another interesting feature of the present case.

A 49-year-old woman presented with a 30-year history of asymptomatic plaque on her right temple. The histological examination revealed nests of nevus cells throughout the entire dermis. Bony spicules were seen just beneath the nevus cell nests in the lower dermis. Cutaneous ossification is an unusual event. Herein, we present a case of intradermal melanocytic nevus with unusual ossification (ne...