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Related Concept Videos

Papillary Dermis01:11

Papillary Dermis

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Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen...
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Cells of the Epidermis01:24

Cells of the Epidermis

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The epidermis is made of four or five layers of epithelial cells, depending on its location in the body. From deep to superficial, these layers are the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.
The cells in all these layers except the stratum basale are called keratinocytes, a type of cell that manufactures and stores the protein keratin. The keratinocytes in the stratum corneum are dead and regularly slough away, being replaced by cells from...
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Skin Cancer01:30

Skin Cancer

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Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
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Reticular Dermis01:15

Reticular Dermis

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The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
Reticular Layer
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...
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Desmosomes01:05

Desmosomes

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The term desmosome derives from the Greek words "desmo" and "soma" meaning "adhesion bodies." This structure was first observed during the late 1800s and described as small, dense nodules in the epidermis. Desmosomes are button-like structures that help form an interlinked network of intermediate filaments across the cells. These junctions are  essential to hold cells together under mechanical stress and to maintain tissue integrity. Desmosomes are multi-protein...
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Accessory Structures of the Skin: Sebaceous Glands01:21

Accessory Structures of the Skin: Sebaceous Glands

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A sebaceous gland is a type of oil gland found almost all over the skin ( except palms and soles) and helps lubricate and waterproof the skin and hair. Most sebaceous glands are associated with hair follicles. They generate and excrete sebum, a mixture of lipids, onto the skin surface, thereby naturally lubricating the dry and dead layer of keratinized cells of the stratum corneum, keeping it pliable.
These glands that produce the oils on the skin and hair are holocrine glands. The mature...
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CUBIC Protocol Visualizes Protein Expression at Single Cell Resolution in Whole Mount Skin Preparations
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Warty Porokeratosis.

N Rajendran

    Indian Journal of Dermatology, Venereology and Leprology
    |January 24, 2017
    PubMed
    Summary

    A rare warty variant of porokeratosis of Mibelli was diagnosed in a 40-year-old male. This distinct clinical presentation, confirmed histopathologically, occurred on the foot and hand.

    Area of Science:

    • Dermatology
    • Histopathology

    Background:

    • Porokeratosis of Mibelli is a rare genodermatosis.
    • It typically presents with characteristic annular lesions.

    Observation:

    • A 40-year-old male presented with an unusual presentation of porokeratosis of Mibelli.
    • The lesions featured a distinct warty encrustation.
    • Affected areas included the left foot and hand.

    Findings:

    • Histopathological examination confirmed the diagnosis of porokeratosis of Mibelli.
    • The clinical presentation was identified as a rare, distinct warty variant.

    Implications:

    • This case highlights the diverse clinical spectrum of porokeratosis of Mibelli.
    • Recognizing rare variants is crucial for accurate diagnosis and management.

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  • Further research into the pathogenesis of warty porokeratosis may be warranted.