. Physical diagnosis . Angioneurotic oedema appears as a sudden, painless, apparentlycauseless swelling of the whole lip (see Fig. 20), which may attain 1 It does harm to call this lesion cancer because this term is so firmly associatedin the lay mind with metastasis, recurrence, and death that unnecessary suffering mayresult when the patient or his family learns that he has cancer. THE HEAD AND FACE 21 double its normal size. The diagnosis depends on the exclusion of allknown causes (trauma, infection, insect bites) and on the history ofsimilar swellings (on the lip or else-where) in the past

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. Physical diagnosis . Angioneurotic oedema appears as a sudden, painless, apparentlycauseless swelling of the whole lip (see Fig. 20), which may attain 1 It does harm to call this lesion cancer because this term is so firmly associatedin the lay mind with metastasis, recurrence, and death that unnecessary suffering mayresult when the patient or his family learns that he has cancer. THE HEAD AND FACE 21 double its normal size. The diagnosis depends on the exclusion of allknown causes (trauma, infection, insect bites) and on the history ofsimilar swellings (on the lip or else-where) in the past. 9. The enlargement of the lips inmyxoedema and cretinism has beenmentioned above (page 19). 10. Hare-lip is a vertical slit(congenital deficiency) in the upperlip opposite to the nostril; it is oftenconnected with an antero-posteriorcleft through the hard palate(cleft palate). The lesion maybe double, leaving a small islandof tissue continuous with the nasalseptum (intermaxillary bone).Diagnosis is made at a glance.. VIII. The Teeth. Fig. 20.—Angioneurotic (Edema ofLower Lip. The first set of teeth is fairly constant in its order and date ofappearance. In Fig. 21 the number of the month when each toothis most apt to appear is marked on the tooth. The second set (per-