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Keratoacanthoma
A Keratoacanthoma is a benign, usually solitary, rapidly developing epithelial neoplasm that arises on the sun exposed areas of fair skinned, elderly individuals. These lesions are characterized by a...
![Angiolymphoid Hyperplasia with Eosinophilia [Kimura's Disease]](https://medtube.net/images/min/aa24e92aaef78a94fa92003013ec3244/149/112/1 "Angiolymphoid Hyperplasia with Eosinophilia [Kimura's Disease]")
Angiolymphoid Hyperplasia with Eosinophilia [Kimura's...
Kimura's disease or angiolymphoid hyperplasia with eosinophilia may present as raised angiomatous nodules arising on the pinna or superficial external auditory canal. These nodules usually persist, slowly...
Venous Lake
A venous Lake is a small, raised, soft blue lesion that may appear on the exposed surface of the pinna. These lesions may be caused by a localized venous capillary hemangioma or as in this case by a large...
Naevus Flammeus
In this patient with Sturge Weber syndrome, there is a large Naevus Flammeus involving the right side of the face.
Capillary Hemangioma
Capillary hemangioma or "strawberry" birthmark is a bright red, soft, lobulated benign tumor are consisting of numerous blood filled benign looking capillaries. Seventy percent of capillary...
Keloid
Keloids not only persist but extend beyond the site of the original injury. This keloid develop following ear piercing. Keloids occur more commonly in blacks than in whites and are more frequent in the...
![Infected Epidermal Inclusion Cyst [drained]](https://medtube.net/images/min/93a1fc620bea4c6f165c0d41cca253c5/149/112/1 "Infected Epidermal Inclusion Cyst [drained]")
Infected Epidermal Inclusion Cyst [drained]
An epidermal cyst may become infected. This is manifested by pain, tenderness and localized swelling. Incision and drainage of the cyst will release a foul-smelling purulent material containing necrotic...
Infected Epidermal Inclusion Cyst
The traumatic implantation of epidermis into the underlying soft tissue may produce a true epidermal inclusion cyst. This infected epidermal inclusion cyst in the lobule of this patient arose from the...
![Trichilemmal [Pilar] Cyst](https://medtube.net/images/min/e9b01aac2ff9b907f0d399d49e2fdc55/149/112/1 "Trichilemmal [Pilar] Cyst")
Trichilemmal [Pilar] Cyst
Trichilemmal cysts originate from the outer root sheath of the hair follicle [the trichilemma]. Pilar cysts occur most commonly on the scalp where they are clinically indistinguishable from epidermal...
![Epidermal Cyst [surgical specimen]](https://medtube.net/images/min/682d3e9584f601fc595604bcdf1a1f66/149/112/1 "Epidermal Cyst [surgical specimen]")
Epidermal Cyst [surgical specimen]
Histologically, epidermal cysts are lined with a true squamous epithelium similar to that seen on the surface of the skin. The cyst itself is filled with laminated layers of shed keratin.
Epidermal Cyst
Epidermal cysts are slow growing, round, firm intradermal or subcutaneous cysts that arise most commonly from the infundibula of hair follicles.
Milia
Milia are multiple superficially located small white cysts that arise from the lowest portion of the infundibulum of the sebaceous duct. These tiny cysts differ from epidermal cysts only in size.
Comedones
A comedone consist of a collection of keratin debris and sebum trapped at the opening of a pilosebaceous follicle. If the follicle is closed, this collection appears whitish and is referred to as a "whitehead"....
Primary Cutaneous Amyloid
The raised subcutaneous deposits in the posterior auricular crease of this patient ear of the result of the deposition of amyloid. Amyloid is a complex fibrillar protein believed to originate from plasma...
Gouty Tophus
Gouty tophi are the result of the subcutaneous accumulation of deposits of monosodium urate crystals. These tophi present as painful, skin coloured nodules occurring most frequency on the helix. Tophi...
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