Pityriasis lichenoides chronica https://en.wikipedia.org/wiki/Pityriasis_lichenoides_chronica
Mae Pityriasis lichenoides chronica yn ddermatosis cynhyrchwyd anghyffredin, idiopathig, a nodweddir gan y grwpiau o papulau cennog, erythematig a all barhau am fisoedd. Mae angen biopsi ar gyfer diagnosis.

○ Diagnosis a Thriniaeth
Profion gwaed i ddiystyru siffilis
Biopsi i ddiystyru lymffoma croenol

Mwy o wybodaeth ― Cymraeg
References Pityriasis lichenoides chronica - Case reports 15748578
Daeth dynes 19 oed i mewn gyda hanes pum mlynedd o frechau bach, smotiog a thwmpathau melynaidd i liw croen wedi’u codi gyda chylch o glorian mân ar ei thorso a’i breichiau a’i choesau. Mae Guttate pityriasis lichenoides chronica yn gyflwyniad anghyffredin o'r clefyd sy'n cael ei reoli gan gelloedd T (T-cell-mediated disease).
A 19-year-old woman came in with a five-year history of small, spotty rashes and raised, yellowish to skin-colored bumps with a ring of fine scales on her torso and arms and legs. Guttate pityriasis lichenoides chronica is an uncommon presentation of this T-cell-mediated disease.