難治性潰瘍性口内炎を契機に判明した急性リンパ性白血病の 1 例

症例は難治性潰瘍性口内炎を契機に判明した急性リンパ性白血病の 1 例である．患者は 60 歳台，女性．下口唇に難治性潰瘍を認め紹介となった．血液検査にて汎血球減少を認めたため，血液疾患を疑った．骨髄検査にて，Ph 染色体陰性急性 B 細胞性リンパ性白血病と診断され，初診の 4 日後からステロイド療法が開始された．なお，下口唇生検の病理組織には明らかな白血病細胞の浸潤は認めなかった．口腔症状が白血病の初発症状となることがあり，これを主訴に受診した白血病患者を早期診断することは大変重要である．しかし，口腔病変の原因は多彩であり，さまざまな科が対応することが多く，各科が連携して診療にあたることが重要と考える．

We herein report a case on refractory ulcerative stomatitis associated with acute lymphoblastic leukemia. The female patient in her 60s showed refractory ulcer on her lower lip ; and the referral was made. Since pancytopenia was found by a blood test, hematologic disease was suspected. Bone marrow examination presented the diagnosis of Philadelphia chromosome-negative B-cell acute lymphoblastic leukemia. Based on this diagnosis, steroid therapy had been initiated from four days after the first visit. On biopsy of lower lip, the pathological tissue did not show obvious infiltration of leukemia cells. Since oral manifestation may sometimes be an initial symptom of leukemia, an early diagnosis on leukemia patient with main complaint of oral symptom is critically important. Oral lesions, however, have various causes, and it thus often requires care of various clinical department. Based on this, it is considered to be important to implement treatment with cooperation among each clinical department.