5-fluorouracil has received FDA approval. Removing the residual superficial tumor with surgery alone can result in large and difficult to repair surgical defects. One often waits a month or more after surgery before starting the inmunotherapy or chemotherapy to make sure the surgical wound has adequately healed. Some people advocate the use of curettage (see EDC below) first, followed by chemotherapy. These experimental procedures are not standard care.Vismodegib and sonidegib are drugs approved for specially treating BCC, but are expensive and cannot be used in pregnant women. Itraconazole, traditionally an anti-fungal medication, has also garnered recent attention for its potential use in the treatment of BCC, especially those that cannot be removed surgically. Possessing anti-Hedgehog pathway activity, there is clinical evidence that itraconazole has some efficacy either alone or when combined with vismodegib/sonidegib for primary and recurrent BCC. There is one case report of efficacy in metastatic BCC. Immunotherapy
This technique uses the bodys immune system to kill cancer cells. Improvement of the immune system works its way out up to the cancerous cells and treat the skin cancer. Topical treatment with 5% Imiquimod cream (IMQ), with five applications per week for six weeks has a reported 70–90% success rate at reducing, even removing, the BCC [basal-cell carcinoma]. Imiquimod has received FDA approval, and topical IMQ is approved by the European Medicines Agency for treatment of small superficial basal-cell carcinoma. Off label use of imiquimod on invasive basal-cell carcinoma has been reported.
Antibiotics are given for an infection. Chronic atelectasis is often treated with antibiotics because infection is almost inevitable. In certain cases, the affected part of the lung may be surgically removed when recurring or chronic infections become disabling or bleeding is significant. If a tumor is blocking the airway, relieving the obstruction by surgery, radiation therapy, chemotherapy, or laser therapy may prevent atelectasis from progressing and recurrent obstructive pneumonia from developing. See also
Alveolar capillary dysplasia, a very rare type of diffuse congenital disorder of the lung
Flat-chested kitten syndrome or FCKS: atelectasis in neo-natal kittens
Tympanic membrane atelectasis: Retraction of the ear drum into the middle ear can also be referred to as atelectasis. William Pasteur, pioneer pulmonologist

References
External links

04-048a. at Merck Manual of Diagnosis and Therapy Home Edition
Atelectasis at Merck Manual of Diagnosis and Therapy Professional Edition