What is cylindroma Cylindroma is a rare, slow-growing, benign (non-cancerous) appendage skin tumor that typically present as a skin colored, reddish or bluish smooth-surfaced dome-shaped nodule(s)

What is atypical fibroxanthoma Atypical fibroxanthoma is a dermal spindle-cell tumor that occurs primarily in older individuals after the skin of the head and neck

Macrophage activation syndrome Macrophage activation syndrome (MAS) is a term used by rheumatologists to describe a potentially life-threatening complication of systemic inflammatory disorders, most commonly

Adult Onset Still's Disease Adult Onset Still's Disease (AOSD) also known as systemic onset juvenile idiopathic arthritis, adult Still's disease or Wissler-Fanconi syndrome, is a

Monoclonal gammopathy of undetermined significance MGUS also called monoclonal gammopathy of undetermined significance, is a medical condition in which an abnormal protein known as 'monoclonal

What is Schnitzler syndrome Schnitzler syndrome is a rare acquired autoinflammatory disorder characterized by a chronic reddish rash that resembles hives (urticaria) and elevated levels of

What is Birt-Hogg-Dube syndrome Birt-Hogg-Dube syndrome is an extremely rare genetic disorder that affects the skin and lungs and increases the risk of certain types

What is trichomycosis axillaris Trichobacteriosis axillaris is a superficial bacterial infection of the hair shafts in sweat gland bearing areas, such as the armpits (axillae)

What is halo nevus A halo nevus is an otherwise normal mole with a white ring or halo, around it. The central dark brown nevus

What is dermatosis papulosa nigra Dermatosis papulosa nigra is a harmless condition commonly affecting the faces of African-American, Afro-Caribbean and sub-Saharan black patients and sometimes