RARE DISEASE LEARNING CENTERS ++++

Generalized Pustular Psoriasis by Madaline Spencer| Published on: Mar 28, 2025 https://checkrare.com/generalized-pustular-psoriasis/ Generalized pustular psoriasis (GPP) is a rare, severe form of psoriasis characterized by sterile pustules across large areas of skin. The condition most commonly affects individuals between the ages of 40 and 59 years. GPP may occur alongside plaque psoriasis and other comorbidities. Erdheim-Chester Disease by Madaline Spencer| Published on: Aug 15, 2024 https://checkrare.com/erdheim-chester-disease-2/ Erdheim-Chester disease (ECD) is a rare condition affecting many parts of the body. Although diagnosed in some children, it most commonly affects adults. ECD causes the overproduction of histiocytes, which then accumulate in tissues and organs. Parts of the body that may be involved include the long bones, retroperitoneum, skin, eyes and eyelids, lungs, brain, heart, kidneys, and pituitary gland. However, various other tissues or organs can be affected. Cutaneous T-Cell Lymphoma by CheckRare Staff| Updated on: Jan 29, 2026 A Spotlight on Two Main Subtypes: Mycosis Fungoides and Sézary Syndrome https://checkrare.com/cutaneous-t-cell-lymphoma-2/ Cutaneous T-cell lymphoma (CTCL) belongs to the non-Hodgkin lymphoma class of hematologic T-cell lymphoproliferative disorders.[1] Cutaneous T-cell lymphoma is a rare group of malignancies, with an incidence of 6.4 cases per 1 million people.[1] This form of T-cell lymphoma represents around 70% of primary cutaneous lymphomas.[2] Recognizing and Diagnosing WHIM Syndrome by CheckRare Staff| Updated on: Jan 12, 2026 https://checkrare.com/recognizing-and-diagnosing-whim-syndrome/ WHIM syndrome is a rare, congenital primary immunodeficiency disorder associated with neutropenia that typically presents in childhood or adolescence, predominantly caused by pathogenic variants in the CXCR4 chemokine receptor gene.[1] The CXCR4 receptor is involved in the mobilization of immune cells from the bone marrow into the blood. Due to the heterogeneous presentation of the disease, coupled with a lack of awareness of the condition, recognition and diagnosis is often delayed, sometimes even into adulthood.[2] Consequently, WHIM syndrome may be misdiagnosed and underdiagnosed.