Vascular Malformation and Common Keratinocytic Nevus of the Soft Type: Phacomatosis Pigmentovascularis Revisited

Phacomatosis pigmentovascularis is a rare syndrome characterized by the coexistence of a pigmented nevus and a cutaneous vascular malformation. We report a 5-year-old boy with all the typical findings of phacomatosis pigmentovascularis type Ia. Although its existence according to the traditional classification has been questioned, this case represents a very rare association of a capillary vascular malformation and a common keratinocytic nevus of the soft type.

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Phacomatosis pigmentovascularis type IIa - case report

Anais Brasileiros de Dermatologia ◽

10.1590/abd1806-4841.20132248 ◽

2013 ◽

Vol 88 (6 suppl 1) ◽

pp. 85-88 ◽

Cited By ~ 4

Author(s):

Majoriê Mergen Segatto ◽

Eloísa Unfer Schmitt ◽

Laura Netto Hagemann ◽

Roberta Castilhos da Silva ◽

Cristiane Almeida Soares Cattani

Keyword(s):

Case Report ◽

Systemic Disease ◽

Rare Syndrome ◽

Capillary Malformation ◽

Phacomatosis Pigmentovascularis ◽

Mongolian Spot ◽

Nevus Flammeus

Phacomatosis Pigmentovascularis is a rare syndrome characterized by capillary malformation and pigmentary nevus. A case of a 2-year-old patient is reported, who presented extensive nevus flammeus and an aberrant Mongolian spot, without systemic disease, manifestations that allow us to classify this case as type IIa Phacomatosis Pigmentovascularis, according to Hasegawa's classification.

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VP36.05: A rare syndrome with a rare association: Dandy‐Walker associated with an occipital meningocele

Ultrasound in Obstetrics and Gynecology ◽

10.1002/uog.24546 ◽

2021 ◽

Vol 58 (S1) ◽

pp. 251-251

Author(s):

G. Berraies ◽

M. Garci ◽

S. Armi ◽

C. Belghith ◽

T. Makhlouf ◽

...

Keyword(s):

Rare Association ◽

Rare Syndrome

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The value of Electron Microscope studies of imperfect natural diamonds

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100174102 ◽

1990 ◽

Vol 48 (4) ◽

pp. 194-195

Author(s):

J C Walmsley ◽

A R Lang

Keyword(s):

Electron Microscope ◽

Classification Scheme ◽

Natural Diamond ◽

Sudden Change ◽

Growth Conditions ◽

Diamond Growth ◽

Major Constituent ◽

Natural Diamonds ◽

Type Ia ◽

Platelet Defects

Interest in the defects and impurities in natural diamond, which are found in even the most perfect stone, is driven by the fact that diamond growth occurs at a depth of over 120Km. They display characteristics associated with their origin and their journey through the mantle to the surface of the Earth. An optical classification scheme for diamond exists based largely on the presence and segregation of nitrogen. For example type Ia, which includes 98% of all natural diamonds, contain nitrogen aggregated into small non-paramagnetic clusters and usually contain sub-micrometre platelet defects on {100} planes. Numerous transmission electron microscope (TEM) studies of these platelets and associated features have been made e.g. . Some diamonds, however, contain imperfections and impurities that place them outside this main classification scheme. Two such types are described.First, coated-diamonds which possess gem quality cores enclosed by a rind that is rich in submicrometre sized mineral inclusions. The transition from core to coat is quite sharp indicating a sudden change in growth conditions, Figure 1. As part of a TEM study of the inclusions apatite has been identified as a major constituent of the impurity present in many inclusion cavities, Figure 2.

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