Summary:Between 1990 and 1996, three patients (1.1%), all with CML, among 272 patients with haematological malignancies, developed bilateral subdural haematomas (SDH) after treatment with i.t. MTX before HSCT in our unit. Since October 1996, we have given i.t. MTX only to patients at increased risk of CNS leukaemia such as ALL and AML M4 or M5. We suggest that intrathecal treatment before HSCT should only be given to patients at increased risk of CNS leukaemia. Keywords: bone marrow transplantation; methotrexate; lumbar puncture; subdural haematoma; CML Subdural haematomas have been observed after dural puncture and are normally a rare complication. However, they are more common in patients with leukaemia and after haematopoietic stem cell transplantation (HSCT). 1 The reported incidences of SDH vary depending on the diagnosis and treatment. [2][3][4] Post-puncture headache has been said to be caused by cerebrospinal fluid leakage, followed by decreased intracranial pressure, leading to traction of pain-sensitive vessels that also may rupture. 5 Post-puncture headache that does not disappear is therefore an indication for computerized tomography (CT). Treatment for SDH may be conservative but surgical drainage is often necessary. 6
Patients, methods and resultsTwo of three patients with CML underwent conditioning with CY 60 mg/kg i.v. once daily for 2 days and TBI 10 Gy (9 Gy to the lungs). One patient received BU 4 mg/kg p.o. in divided doses daily for 4 days and CY 60 mg/kg i.v. once daily for 2 days. 7 GVHD prophylaxis consisted of CYA, in combination with MTX. 8 Two patients were also treated with heparin 100 U/kg/day from day −4 as Correspondence: Dr P Hentschke, Centre for Allogeneic Stem Cell Transplantation, Huddinge Hospital, B56, SE-141 86 Huddinge, Sweden Received 27 November 1998; accepted 13 May 1999 VOD prophylaxis. 9 Intrathecal MTX was given on day −2 to one patient, on days −9 and −2 to one patient and on day −9 to another patient. Post-puncture headache developed immediately after i.t. MTX in all patients. Bilateral subdural haematomas were diagnosed by CT between days +11 and +27 after HSCT. Surgical drainage was performed in all three patients and two patients are alive and well 8. and 3 years after HSCT, respectively. One patient died of liver failure 5 months after HSCT.
Case 1A 34-year-old male with CML underwent BMT from an HLA-identical brother in October 1990 after treatment with BU and CY. I.t. MTX was given on day −2 before BMT and was followed by the immediate onset of headache that resolved spontaneously. At this time, his platelet count was 100 ϫ 10 9 /l, prothrombin time and partial thromboplastin time were normal. Ten days after HSCT, he again developed a bilateral frontal headache which was different from the initial headache. His platelet count at this time was 10 ϫ 10 9 /l. Five days later, he complained of nausea and vomiting and became somnolent. CT on day +20 revealed bilateral SDH about 1 cm wide on the left side and 0.5 cm on the right side with slight displacement of the...