ent cases
![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...
![Chondrodermatis Nodularis Helicus Chronica [Winkler's Nodule]](https://medtube.net/images/min/9e07572f9dcd5cd00406d1f235d398ed/149/112/1 "Chondrodermatis Nodularis Helicus Chronica [Winkler's Nodule]")
Chondrodermatis Nodularis Helicus Chronica [Winkler's...
Chondrodermatis Nodularis Helicus Chronica is the formal name given to a discrete, firm, raised and frequently painful nodule located on the pinna. This nodule is most commonly located on the apex of...
Herpes Zoster Of The Pinna
Over time, the pustules rupture, dry out and become crusted. When herpes zoster involves the sensory portion of the geniculate ganglion of the facial nerve, it may produce a lower motor neuron facial...
Acute Erysipelas
Erysipelas is an acute localized but superficial spreading cellulitis usually caused by group A beta hemolytic streptococci and characterized by involvement of the lymphatics. The cutaneous lesions are...
Idiopathic Cystic Chondromalacia of the Pinna
Idiopathic Cystic Chondromalacia is a cystic degeneration of the auricular cartilage of unknown origin, which may be mistaken both clinically and histologically for relapsing polychondritis. Clinically,...
Psoriasis of the External Ear Canal
Psoriatic dermatitis may extend into the external auditory canal. In this case, the superficial external auditory canal shows a collection of white, silvery, scaly debris.
Psoriasis Pinna
Note the sharply demarcated salmon coloured plaques of psoriasis just below the helical rim. The upper portion of the lesion is covered with the characteristic silvery scales.
Psoriasis
Psoriasis vulgaris is a hereditary disorder of skin characterized by an increased rate of epidermal cell replication.
Accessory Auricle
A preauricular appendage that contains a cartilaginous core is called an "accessory auricle". Accessory auricles represent a small ectopic remnant of one of the embryological hillocks.
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