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The circular shape is known as a wheal response. The Mantoux test or Mendel–Mantoux test (also known as the Mantoux screening test, tuberculin sensitivity test, Pirquet test, or PPD test for purified protein derivative) is a tool for screening for tuberculosis (TB) and for tuberculosis diagnosis. It is one of the major tuberculin skin tests ...
Lupus vulgaris (also known as tuberculosis luposa[ 1]) are painful cutaneous tuberculosis skin lesions with nodular appearance, most often on the face around the nose, eyelids, lips, cheeks, ears [ 2] and neck. It is the most common Mycobacterium tuberculosis skin infection. [ 3] The lesions may ultimately develop into disfiguring skin ulcers ...
Dermatology, Immunology. Discoid lupus erythematosus is the most common type of chronic cutaneous lupus (CCLE), an autoimmune skin condition on the lupus erythematosus spectrum of illnesses. [ 1][ 2] It presents with red, painful, inflamed and coin-shaped patches of skin with a scaly and crusty appearance, most often on the scalp, cheeks, and ...
Infectious disease. Latent tuberculosis ( LTB ), also called latent tuberculosis infection ( LTBI) is when a person is infected with Mycobacterium tuberculosis, but does not have active tuberculosis (TB). Active tuberculosis can be contagious while latent tuberculosis is not, and it is therefore not possible to get TB from someone with latent ...
A rheumatoid nodule is a lump of tissue, or an area of swelling, that appears on the exterior of the skin usually around the olecranon (tip of the elbow) or the interphalangeal joints (finger knuckles), but can appear in other areas. [ 1] There are four different types of rheumatoid nodules: subcutaneous rheumatoid nodules, cardiac nodules ...
Erythema nodosum is characterised by 1–2-inch (25–51 mm) nodules (rounded lumps) below the skin surface, usually on the shins. These subcutaneous nodules can appear anywhere on the body, but the most common sites are the shins, arms, thighs, and torso. Each nodule typically disappears after around two weeks, though new ones may continue to ...
SSSS often includes a widespread painful erythroderma, often involving the face, diaper, and other intertriginous areas. Extensive areas of desquamation might be present. Perioral crusting and fissuring are seen early in the course. Unlike toxic epidermal necrolysis, SSSS spares the mucous membranes. Children with SSSS may exhibit fussiness or ...
Prurigo nodularis ( PN ), also known as nodular prurigo, is a skin disorder characterized by pruritic ( itchy ), nodular lesions, which commonly appear on the trunk, arms and legs. [ 1] Patients often present with multiple excoriated nodules caused by chronic scratching. Although the exact cause of PN is unknown, PN is associated with other ...