MedGen

Immunodeficiency-22 (IMD22) is an autosomal recessive disorder characterized by the onset of recurrent bacterial, viral, and fungal respiratory, gastrointestinal, and skin infections in infancy or early childhood. Immunologic workup shows severe T-cell lymphopenia, particularly affecting the CD4+ subset, and impaired proximal TCR intracellular signaling and activation. Although NK cells and B cells are normal, some patients may have hypogammaglobulinemia secondary to the T-cell defect. There are variable manifestations, likely due to the severity of the particular LCK mutation: patients may develop prominent skin lesions resembling epidermodysplasia verruciformis, gastrointestinal inflammation, and virus-induced malignancy. The disease can be fatal in childhood, but hematopoietic stem cell transplant (HSCT) may be curative (Hauck et al., 2012; Li et al., 2016; Keller et al., 2023). [from OMIM]

A biologic subset of breast carcinoma defined by low to moderate expression of genes characteristic of luminal epithelial cells including estrogen receptor (ER), and high expression of GGH, LAPTM4B, and CCNE1. This subtype of breast cancer is associated with a good prognosis, although not as favorable as the luminal A subtype. [from NCI]

Familial atypical multiple mole melanoma (FAMMM) syndrome is an inherited genodermatosis characterized by the presence of multiple melanocytic nevi (often >50) and a family history of melanoma as well as, in a subset of patients, an increased risk of developing pancreatic cancer (see this term) and other malignancies. [from ORDO]

Common variable immunodeficiency-15 (CVID15) is an autosomal dominant immunologic disorder characterized by the onset of severe recurrent infections in infancy or early childhood. Laboratory studies show hypogammaglobulinemia with antibody deficiencies of IgM, IgG, and IgA due to impaired plasma cell homeostasis, although other B cell subset numbers are normal. T and NK cells are also normal. Treatment with IV Ig results in a favorable clinical response to recurrent infections (Schubert et al., 2018). For a general description and a discussion of genetic heterogeneity of common variable immunodeficiency, see CVID1 (607594). [from OMIM]

A subset of acute lymphoblastic leukemia that results from a reciprocal translocation between the ABL-1 oncogene and a breakpoint cluster region (BCR), resulting in a fusion gene, BCR-ABL, that encodes an oncogenic protein with constitutively active tyrosine kinase activity. [from HPO]