A 23-year-old pregnant woman developed pregnancyinduced hypertension during treatment with tretinoin for acute promyelocytic leukaemia (APL).The woman was diagnosed with APL during the sixth month of pregnancy and began receiving tretinoin [all-trans retinoic acid; ATRA] 45 mg/m 2 /day [route not stated] at 26 weeks of gestation. On therapy day 3, she reported chest distress and polypnoea; a physical examination revealed generalised oedema, a BP of 149/103mm Hg and a HR of 110bpm. On day 6, laboratory investigations identified the following: pancytopenia, albumin 28 g/L, blood creatinine 246 µmol/L and urine protein ++. Pregnancy-induced hypertension syndrome was diagnosed.Fetal demise was identified on day 8 and the pregnancy was terminated by caesarean section. The woman's BP and HR subsequently normalised. Her tretinoin dosage was decreased to 25 mg/m 2 /day on day 14, and she ultimately achieved complete remission.Author comment: "ATRA treatment may have initiated or aggravated the pregnancy‑induced hypertension during the administration process. Therefore, it was concluded that the pregnancy‑induced hypertension in the present study resulted from ATRA treatment." Song K, et al. Pregnancy-induced hypertension caused by all-trans retinoic acid treatment in acute promyelocytic leukemia: A case report. Oncology Letters 10: 364-366, No. 1, Jul 2015 -China 803126475 » Editorial comment: A search of AdisBase, Medline andEmbase did not reveal any previous case reports of pregnancyinduced hypertension associated with tretinoin.The WHO ADR database contained no reports of gestational hypertension associated with tretinoin.