What is a polycyclic lesion?
Polycyclic lesions present as configurations arranged in more than one ring. Some annular lesions may coalesce into a polycyclic shape; alternatively, the appearance of such lesions may be independent. For example, the annular lesions of tinea corporis can combine to create a polycyclic lesion.
What causes annular lesions?
In adults, the most common etiology of annular lesions is tinea, a superficial fungal infection of keratinized tissue. While tinea may be readily identifiable, a wide variety of clinical entities mimic these infections, leading to confusion and, often, misdiagnosis.
What is configuration of skin lesion?
Configuration of lesions Configuration refers to the shape or outline of the skin lesions. Skin lesions are often grouped. The pattern or shape may help in diagnosis as many skin conditions have a characteristic configuration. Nummular lesion — round (coin-shaped) lesions; also known as discoid.
What are annular lesions?
DEFINITION. Annular skin lesions are figurate lesions characterized by a ring-like morphology. Although plaques represent the most common presentation of annular lesions, lesions may also be macular, nodular, or composed of grouped papules, vesicles, or pustules.
What are Papulosquamous lesions?
Papulosquamous disorders are skin lesions consisting of red or purple papules or plaques with scale. A. Suspect pityriasis rosea when pink to red oval papules appear parallel to the lines of skin stress. A larger, erythematous, scaly plaque called the herald patch occurs in many cases.
What is a confluent lesion?
(1) of lesions or skin eruptions : having run or grown together and so no longer discrete The lesions begin as 1 to 3 mm macules that gradually become confluent assuming a reticulated lacelike pattern.— Pearl E. Grimes.
Are annular lesions itchy?
Annular lesions can be partial (arciform) and coalesce to form polycyclic (ringed), serpiginous (wavy), and gyrate (revolving) patterns. Classically, the annular or arciform lesions have an advancing outer erythematous edge with a trailing (inner) scaly edge. The rash may be itchy.
What causes Papulosquamous?
Papulosquamous disorders have many different causes and treatments. Some of the most common include psoriasis, lichen planus, and certain drug eruptions.
What is confluent and reticulated papillomatosis?
Confluent and reticulated papillomatosis (CARP) is an uncommon dermatosis characterized by hyperpigmented scaly macules or papillomatous papules coalescing into confluent patches or plaques centrally with a reticular pattern peripherally (picture 1A-D). It most commonly occurs on the trunk.