<prompt> Omenn syndrome is a form ofSquamous cell carcinomaChronic mucocutaneous candidiasisIgA deficiencySevere combined immunodeficiency  <response>: Omenn syndrome is an autosomal recessive form of severe combined immunodeficiency SCID characterized by erythroderma skin redness, desquamation peeling skin, alopecia hair loss, chronic diarrhoea, failure to thrive, lymphadenopathy enlarged lymph nodes, eosinophilia, hepatosplenomegaly, and elevated serum IgE levels. Ref Harrison 20th edition pg 1234 