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pseudoatrophoderma colli
Etiology:
- idiopathic
- vitamin A deficiency may be a contributing factor
- may be a form of parapsoriasis
Epidemiology:
- rare, 10-20 reported cases
- female predominance, all but 1 reported case in females
- reported cases 14-45 years
Pathology:
- benign disease
- no associated mortality or morbidity.
- skin biopsy
- hyperkeratosis of the epidermis
- occasional parakeratosis
- thinning of the granular layer
- pacanthosis of some areas
- vacuolation & pyknosis of prickle cells
- minimal perivascular lymphocytic infiltration in the dermis
- fragmentation of elastic tissue has been described
- may be helful distinguishin from
- atrophic lichen planus, lichen sclerosus, poikiloderma, or porokeratosis
Genetics:
- autosomal dominant
Clinical manifestations:
- pigmented macules & plaques with a wrinkled atrophic appearance
- plaques & macules are 3-7 mm in diameter, oval or irregular, white or pink
- some lesions coalesce in arcuate patches
- plaques may be shiny or wrinkled & may show some scaling
- lesions may contain hypopigmented & hyperpigmented areas
- distribution: neck & upper part of trunk
- usually 1st appears on back of neck, gradually circles the neck & spreads to trunk
- spread is gradual with partial regressions
- lesions persist for years or decades.
- generally asymptomatic but may be associated with pruritus
Laboratory:
- none indicated
Differential diagnosis:
- acanthosis nigricans
- confluent & reticulated papillomatosis
- ichthyosis vulgaris
- lichen planus
- lichen sclerosus
- poikiloderma of Civatte
- porokeratosis
- Tinea versicolor
- vitiligo
Management:
- prognosis
- spontaneous clearing in 1 patient
General
skin disease (dermatologic disorder, dermatopathy, dermatosis)
References
- Choczaj-Kukula A, Elston DM
Medscape: Pseudoatrophoderma Colli
https://emedicine.medscape.com/article/1118019-overview