Which of the following is NOT part of the upper respiratory tract?

A patient presented with painful ulcerative lesions in his buccal mucosae, gingiva, and tongue. The lesions were subsequently proven to be pemphigus vulgaris on biopsy. Which of the follow-ing treatment regimens would be most effective in controlling this patient's disease?

a. Systemic acyclovir b. Topical corticosteroids c. Systemic corticosteroids d. Systemic antibiotics e. Systemic antifungals

The following questions may require the use of an ICD-9-CM code book to complete the sentence. The heterograft replacement of the mitral valve is coded to procedure code __________

Fill in the blank(s) with correct word