Inverse pityriasis rosea is an atypical type of pityriasis rosea. Pityriasis rosea usually develops on the chest, back, or abdomen. Instead, inverse pityriasis rosea affects the armpits or groin.

Pityriasis rosea may be said to be atypical when the diagnosis has been difficult. An atypical pityriasis rosea rash is often marked by: No one knows what causes pityriasis rosea. According to the ...

Pityriasis rosea is a common skin condition affecting 0.15% of the general population. This condition is more often than not diagnosed clinically by appearance and symptoms. The lesions of the ...

Pityriasis rosea, a rash that usually appears on the torso, upper arms, thighs, or neck, may sound worse than it really is. The condition has a name that’s hard to say: pit-ih-RIE-uh-sis ROW-zee-ah.

“While textbooks often describe the distribution of the rash as resembling a Christmas tree, atypical presentations often make diagnosis a challenge,” Friedman said. Pityriasis rosea can be ...

Pityriasis rosea lesions are characteristically oriented ... However, it is important to recognize atypical presentations. For example, the herald patch has been reported in unexpected locations ...

Pityriasis rosea is an oval-shaped rash that’s typically raised and scaley. The underlying cause isn’t clear, but experts suspect it’s related to viral infections. Skin rashes are common and ...

Diagnosing pityriasis rosea is nearly always made by history and physical examination alone. In certain atypical cases, a skin biopsy may prove useful in differentiating pityriasis rosea from ...

Pityriasis rosea tends to affect people between the ages of 10 and 35 and occurs more often during the spring and fall. Symptoms Although they have similarities, pityriasis rosea and ringworm lead ...