About Bioline  All Journals  Testimonials  Membership  News

Neurology India
Medknow Publications on behalf of the Neurological Society of India
ISSN: 0028-3886 EISSN: 1998-4022
Vol. 59, Num. 5, 2011, pp. 762-764

Neurology India, Vol. 59, No. 5, September-October, 2011, pp. 762-764

Letter to Editor

Danazol-induced life-threatening cerebral venous thrombosis in a patient with aplastic anemia

G Sudheer Kumar, VR Roopesh Kumar, MS Gopalakrishnan, CV Shankar Ganesh, MS Venkatesh

Department of Neurosurgery, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Pondicherry, India
Correspondence Address: V R Roopesh Kumar, Department of Neurosurgery, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Pondicherry, India,

Date of Submission: 12-Apr-2011
Date of Decision: 12-Apr-2011
Date of Acceptance: 28-May-2011

Code Number: ni11227

PMID: 22019667

DOI: 10.4103/0028-3886.86557


Cerebral venous thrombosis (CVT) is common in women and mostly reported during puerperium. [1] Exogenous androgens, used either to increase muscle mass in various sports or in various clinical situations, can occasionally predispose to CVT. [2],[3],[4]

A 40-year-old male presented with acute onset headache and altered sensorium. Six months before this admission, he was evaluated for pancytopenia and was diagnosed to have aplastic anemia on bone marrow biopsy. Since then, he was on danazol therapy, 200 mg per day. Neurological examination revealed drowsy patient opening eyes and localizing to pain with bilateral papilledema, aphasia, and right hemiparesis (motor power grade 3/5). Investigations showed hemoglobin - 8.9 g% and platelet count - 90 000/ Cranial computerized tomography (CT) scan showed left frontal hemorrhagic infarct with surrounding edema, 8 mm midline shift, and subfalcine herniation [Figure - 1]. An emergency left frontal craniotomy was done. Peroperatively, the superficial cortical veins draining the left frontal lobe were thrombosed. Frontal lobe was significantly bulging out of the dural opening. Following decompression of the hemorrhagic infarct, frontal lobe became lax and pulsatile. Postoperatively, he was electively ventilated and managed with cerebral decongestants. Histopathological examination of the material confirmed the diagnosis of CVT; H and E stained sections showed thrombi in almost all cortical veins and extensive venous stasis in the surrounding brain parenchyma [Figure - 2] and [Figure - 3]. A repeat CT brain done 48 hours later showed adequate decompression of the infarct with resolving edema and midline shift [Figure - 4]. Subsequently low molecular weight heparin was administered for 10 days. Laboratory evaluation for antithrombin III activity, protein C, S factor V Leiden, plasma homocysteine, and anticardiolipin antibodies were within normal limits. He improved neurologically over the next few weeks. At discharge, he was conscious, alert, and oriented. His aphasia and right hemiparesis improved completely. As he had aplastic anemia, further oral anticoagulation was not considered and the offending drug danazol was discontinued. At 4-month follow-up, the patient is leading an independent life.

Exogenous androgen administration causing CVT has been reported only in a few instances earlier. [2],[3],[4] Most often, androgens were either administered as an anabolic hormone for body building or as a therapeutic intervention for aplastic anemia. Danazol (a synthetic androgenic steroid) has been found to induce a procoagulant state by decreasing cyclooxygenase activity, thereby enhancing platelet function. This predisposes to arterial and venous thrombosis. [2] There has been a few case reports of danazol-induced intracranial hypertension (IH). [5],[6] The most probable cause of IH in these patients was underlying dural sinus thrombosis. In this patient, other risk factors that predispose to CVT have been excluded. Anemia can also predispose to CVT; however, in this patient, the hemoglobin was not too low. The only risk possible factor for CVT in this patient was danazol therapy.

Treatment of CVT includes anticoagulation and cerebral decongestants. There is place for decompressive hemicraniectomy in patients with space-occupying venous infarct with or without hemorrhage. [7] Our patient had decompressive craniotomy as he had space-occupying infarct and evidence of impending herniation. Our patient is probably the first case report of danazol-induced life-threatening CVT warranting surgical decompression. If the patient while on androgen therapy develops CVT, then the drug needs to be discontinued and alternative therapy may be considered for aplastic anemia. [4]

In patients with CVT, anticoagulation therapy should be initiated at the earliest to prevent extension of the thrombosis. [8] However, there are no prospective studies about the timing of anticoagulation in the postoperative period in these patients. In aplastic anemia with CVT, the place of anticoagulation therapy is controversial. In this patient, anticoagulation was administered in the immediate postoperative period and continued for a short period since the inciting factor, danazol, was withdrawn.


1.Kalita J, Bansal V, Misra UK, Phadke RV. Cerebral venous sinus thrombosis in a tertiary care setting in India. QJM 2006;99:491-2.  Back to cited text no. 1  [PUBMED]  [FULLTEXT]
2.Sahraian MA, Mottamedi M, Azimi AR, Moghimi B. Androgen-induced cerebral venous sinus thrombosis in a young body builder: Case report. BMC Neurol 2004;4:22.  Back to cited text no. 2  [PUBMED]  [FULLTEXT]
3.Jaillard AS, Hommel M, Mallaret M. Venous sinus thrombosis associated with androgens in a healthy young man. Stroke 1994;25:212-3.  Back to cited text no. 3  [PUBMED]  
4.Hassan KM, Varadarajulu R, Sharma SK, Motwani H, Mishra DK, Dhall A, et al. Cerebral venous thrombosis in a patient of paroxysmal nocturnal haemoglobinuria following aplastic anaemia. J Assoc Physicians India 2001;49:753-5.  Back to cited text no. 4  [PUBMED]  
5.Pears J, Sandercock PA. Benign intracranial hypertension associated with danazol. Scott Med J 1990;35:49.  Back to cited text no. 5  [PUBMED]  
6.Hamed LM, Glaser JS, Schatz NJ, Perez TH. Pseudo tumor cerebri induced by danazol. Am J Ophthalmol 1989;107:105-10.  Back to cited text no. 6  [PUBMED]  
7.Lath R, Kumar S, Reddy R, Boola GR, Ray A, Prabhakar S, et al. Decompressive surgery for severe cerebral venous sinus thrombosis. Neurol Ind 2010;58:392-7.  Back to cited text no. 7    
8.Stam J, de Bruijn S, deVeber G. Anticoagulation for cerebral sinus thrombosis. Stroke 2003;34:1054-5.  Back to cited text no. 8  [PUBMED]  [FULLTEXT]

Copyright 2011 - Neurology India  

The following images related to this document are available:

Photo images

[ni11227f4.jpg] [ni11227f3.jpg] [ni11227f1.jpg] [ni11227f2.jpg]
Home Faq Resources Email Bioline
© Bioline International, 1989 - 2024, Site last up-dated on 01-Sep-2022.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Google Cloud Platform, GCP, Brazil