Chondrodermatitis nodularis chronica helicis is a small, nodular, tender, chronic inflammatory lesion occurring on the helix of the ear, most often in men. : 610  it often presents as a benign painful erythematous nodule fixed to the cartilage of the helix or antihelix of the external ear. Although the exact cause of the condition is unknown, it has been linked to head pressure on the ear while sleeping. Treatment options include the use of pressure-relieving devices or, in cases where that is not an option, surgery. See also
List of cutaneous conditions


== References ==
Familial nasal acilia is a rare congenital defect which is characterized by the complete absence of cilia on the epithelial cells of the respiratory tract. Symptoms are common within ones family and start as soon as one is born, with signs such as respiratory distress, dyspnea, lobar atelectasis, bronchiectasis and neo-natal pneumonia. Other symptoms that occur later in life include chronic moist coughing, chronic sinusitis, chronic otitis media, chronic rhinitis, and recurrence of upper and lower respiratory tract infections.Exact prevalence is unknown, OrphaNet estimates this condition to affect less than 1 out of every million people worldwide. R Soferman et al. described this disorder to be "autosomal recessive". == References ==