30 - Parapsoriasis and Pityriasis Lichenoides Flashcards
Peak incidence of parapsoriasis
Fifth decade - disease of middle aged and older people
LPP lesions are typically larger than
5 cm
Poikiloderma is defined as the triad of
Atrophy
Mottled pigmentation
Telangiectasia
Rare variant of LPP than presents as an extensive eruption of scaly macules and papules in a net-like or zebra-stripe latter that eventually becomes poikilodermatous
Retiform parapsoriasis
Distinctive variant of SPP which follows the lines of cleavage of the skin and gives the appearance of a hug that left fingerprints on the trunk
Digitate dermatosis
Digitate lesions with a yellow hue
Xanthoerythrodermia perstans
Parapsoriasis and MF are associated with an increased risk of
Acute myocardial infarction and stroke
Subsequent hematologic and nonhematologic malignancies
_____ can be regarded as the clinically benign end of the MF disease spectrum, which eventuates in _____ at its malignant extreme
LPP
Transformed large cell lymphoma
Unifying feature of the parapsoriasis group of diseases (LPP, SPP, pityriasis lichenoides) is that all of them appear to be _____ disorders
Cutaneous T-cell lymphoproliferative
_____% of cases of LPP progress to overt MF
10-30
Said to progress to overt MF in most cases
Retiform variant
Pityriasis lichenoides is more common in
Children and young adults
Pityriasis lichenoides has a seasonal variation favoring
Fall and winter
Present as recurrent crops of erythematous scaly papules that spontaneously regress over several weeks to months
PLC
Manifest as recurrent crops of erythematous papules that develop crusts, vesicles, pustules, or erosions before spontaneously regressing within a matter of weeks
PLEVA
