Nose and Mouth

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Chapter 6 Nose and Mouth

A. The Nose

8 What is lupus pernio?

It is a chronic, nonblanching, diffuse, and purple skin discoloration of the external nose, in the absence of true nasal enlargement (Fig. 6-2). Hence, it differs from rhinophyma. A sign of active sarcoid, it may occur with uveitis, erythema nodosum, and pulmonary involvement. It may also coexist with lesions of the ears, cheeks, hands, and fingers. The term lupus refers to any disfiguring skin condition that, like a wolf (lupus in Latin) “devours” the patient’s facial features. It is thus used with modifying terms to designate various disfiguring skin diseases, such as lupus verrucosus, lupus erythematosus, lupus tuberculosis, lupus vulgaris, and, of course, lupus pernio. Pernio is Latin for frostbite and refers to the peculiar violet-bluish hue of the condition (see Chapter 3, The Skin, question 265).

image

Figure 6-2 Lupus pernio.

(From Fitzpatrick JE, Aeling JL: Dermatology Secrets. Philadelphia, Hanley & Belfus, 1996.)

B. The Oral Cavity

(2) Posterior Pharynx and Tonsils

36 What are the two main structures of the posterior pharynx?

The hard and the soft palate (Fig. 6-5). These are supported by the anterior and posterior pillars.

image

Figure 6-5 Anatomy of the oropharynx.

(From Epstein O, Perkin CD, de Buono DP, Cookson J: Clinical Examination, 2nd ed. St. Louis, Mosby, 1998.)

43 What are the causes of an exudate (i.e., pus) on the posterior pharynx?

Many agents can cause exudative pharyngitis (Table 6-1), the most important being upper respiratory tract viruses, group A beta-hemolytic streptococci, and the EBV.

Table 6-1 Causes of exudative posterior pharyngitis

Pathogen Probability (%)
Viral 50–80
Streptococcal 5–36
Epstein-Barr virus 1–10
Chlamydia pneumoniae 2–5
Mycoplasma pneumoniae 2–5
Neisseria gonorrhoeae 1–2
Haemophilus influenzae type b 1–2
Candidiasis <1
Diphtheria <1

(Data from Ebell M, et al: Does this patient have strep throat? JAMA 284:2912–2918, 2000.)