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Corneal epithelial microcysts due to high-dose cytarabine administration in a pediatric acute myeloid leukemia patient / Pediatrik Akut Miyeloid Losemili Hastada Yuksek Doz Sitarabin Uygulamasina Bagli Korneal Epitel Mikrokistler.

To the Editor,

Over the past 2 decades the advent of new therapeutic strategies has led to remarkable progress in the treatment of acute myeloid leukemia (AML) (1); however, some serious side effects of treatment may be clinically apparent (2). An 8-year-old boy was diagnosed as AML and started on AML-BFM 2004 therapy in August 2009. There were no important side effects observed until the initiation of hAM block treatment (1 g [m.sup.-2] of cytarabine every 12 h on d 1-3 and 10 mg * [m.sup.-2] * [d.sup.-1] of mitoxantrone on d 3). We have written informed consent.

On d 6 of hAM block treatment the patient complained of a burning sensation in his eyes and photophobia. Ophthalmologic consultation showed bilateral multiple diffuse corneal epithelial microcysts and mild superficial punctate epitheliopathy (Figure 1). The remainder of the ophthalmologic examination was normal. Conservative management with topical artificial teardrops and follow-up was planned. The patient's ophthalmologic complaints reduced in severity within 5 d and the corneal findings decreased and disappeared within 3 weeks.

[FIGURE 1 OMITTED]

The patient's next block treatment was HAE block and consisted of a higher dose of cytarabine (3 g [m.sup.-2] every 12 h on d 1-3) than did the haM block treatment (1 g [m.sup.-2] cytarabine), and also included 125 mg * [m.sup.-2] * [D.sup.-2] of etoposide on d 2-5. High-dose cytarabine (1 g 100 [mL.sup.-2] concentration in 5% dextrose) was given for 3 h this time. Topical artificial tears were continued every 2 h together with artificial tear gel b.i.d. Photophophia and the burning sensation in the patient's eyes recurred, but resolved 3 d after drug cessation.

Systemic medications may reach the cornea via the tear film, aqueous humor, or limbal vasculature (3). Corneal changes may result in reduced visual acuity, photophobia, and ocular irritation--symptoms that typically resolve following drug cessation. Ocular side effects of systemic medications are often dose-related and transient. High doses of systemic drugs may lead to progressive lenticular changes as well as irreversible retinal toxicity (3).

Cytarabine is a cell cycle-specific (S phase) antimetabolite that inhibits DNA synthesis. Cytarabine exerts its greatest effect on rapidly dividing cells, and may be toxic to the corneal epithelium, despite its use as a topical agent (2). Systemic use at high doses may also produce corneal and conjunctival epithelial toxicity, with conjunctival hyperemia, punctate keratopathy, and corneal epithelial microcysts (4).

[FIGURE 2 OMITTED]

Histopathologic examination shows profound degeneration of the rapidly dividing basal epithelial cells, which leads to formation of epithelial microcysts. Cytarabine may be administered intravenously or intrathecally, with ocular symptoms typically developing within 1 week of initiation. Cytarabine penetrates the blood-brain barrier following intravenous injection and may affect the cornea via both the aqueous humor and tears. Visual symptoms include tearing, photophobia, foreign body sensation, pain, and reduced visual acuity (4). It is suggested that ocular toxicity results from the inhibition of corneal epithelial DNA synthesis, and is related to both drug dosage and duration of use (5). We presented a case of corneal epithelial microcysts associated with high-dose cytarabine treatment. Clinicians should consider corneal epithelial microcysts in patients that experience tearing, photophobia, pain, and reduced visual acuity following cytarabine treatment.

Conflict of Interest Statement

The authors of this paper have no conflicts of interest, including specific financial interests, relationships, and/or affiliations relevant to the subject matter or materials included.

DOI: 10.5505/tjh.2012.21704

Address for Correspondence: Tuba HILKAY KARAPINAR, M.D., Dokuz Eylul Universitesi, Tip Fakultesi, 35140, Balcova, Izmir, Turkey

Phone: +90 232 412 48 88 E-mail: thkarapinar@yahoo.com

Received/Gelis tarihi: November 25, 2010

Accepted/Kabul tarihi: March 28, 2011

References

(1.) Kaspers GJ, Zwaan CM: Pediatric acute myeloid leukemia: Towards high-quality cure of all patients. Haematologica 2007; 92: 1519-1532

(2.) Oeffinger KC, Nathan PC, Kremer LCM: Challenges after curative treatment for childhood cancer and long term follow up of survivors. Hematol Oncol Clin N Am 2010; 24: 129-149

(3.) Hollander DA, Aldave AJ: Drug-induced corneal complications. Curr Op Ophtalmol 2004; 15: 541-548

(4.) Hopen G, Mondino BJ, Jhonson BL, Chervenick PA: Corneal toxicity with systemic cytarabine. Am J Ophthalmol 1981; 91: 500-504

(5.) Ritch PS, Hansen RM, Heuer DK: Ocular toxicity from high-dose cytosine arabinoside. Cancer 1983; 51: 430-432

Tuba Hilkay Karapinar (1), Salih Gozmen (1), Ozlem Tufekci (1), Sebnem Yilmaz (1), Zeynep Ozbek (2), Melih Parlak (2), Giilersu Irken (1), Hale Oren (1)

(1) Dolzuz Eylul University, School of Medicine, Department of Pediatric Hematology, Balcova, Izmir, Turkey

(2) Dolzuz Eylul University, School of Medicine, Department of Ophthalmology, Balcova, Izmir, Turkey
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Author:Karapmar, Tuba Hilkay; Gozmen, Salih; Tufekci, Ozlem; Yilmaz, Sebnem; Ozbek, Zeynep; Parlak, Melih;
Publication:Turkish Journal of Hematology
Article Type:Clinical report
Geographic Code:7TURK
Date:Mar 1, 2012
Words:768
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