Hairy cell leukemia and variant in Taiwan

Report of a variant case and literature review

Yen Chuan Hsieh, Shen Tsung Chang, Shih Sung Chuang, Chin Li Lu, Chao Jung Tsao, Ching Nan Lin, Chin Yang Li

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Hairy cell leukemia (HCL) is characterized by leukemic cells with abundant "hairy" cytoplasm, strong cytoplasmic positivity for tartrate-resistant acid phosphatase (TRAP), characteristic immunophenotype and sensitivity to treatment with purine nucleoside analogs. HCL-variant (HCL-v) encompasses chronic B-cell leukemias resembling classical HCL but exhibiting variant cytomorphology, variant immunophenotype and resistance to conventional HCL therapy. We present the case of a 67-year-old Taiwanese male with HCL-v who had leukocytosis and splenomegaly. His hairy leukemic cells were weakly positive for TRAP and expressed CD11c and CD103 but not CD25. He received oral chemotherapy with chlorambucil and in complete hematological remission in 9 months but relapsed 2 months later. Literature review revealed 9 cases of HCL and 3 cases of HCL-v including current case from Taiwan. All patients were adults with splenomegaly. The HCL patients had a significantly higher frequency of leukopenia (p = 0.024) and monocytopenia (p = 0.008) and a lower frequency of leukocytosis (p = 0.018) than HCL-v patients. All 8 HCL patients responded favorably to 2-chlorodeoxyadenosine with or without splenectomy. The 3 HCL-v patients had leukocytosis and received chemotherapy with variable outcome. HCL and HCL-v are rare in Taiwan and their pathological and immunophenotypical features were not fully characterized. A multi-modality approach incorporating hematological findings, cytomorphology, histopathology, cytochemistry, complete immunophenotyping and clinical features is needed to identify and characterize such cases in Taiwan.

Original languageEnglish
Pages (from-to)183-189
Number of pages7
JournalInternational Journal of Clinical and Experimental Pathology
Volume4
Issue number2
Publication statusPublished - 2011

Fingerprint

Hairy Cell Leukemia
Taiwan
Leukocytosis
Splenomegaly
Cladribine
Purine Nucleosides
Chlorambucil
Drug Therapy
Immunophenotyping
Histocytochemistry
Leukopenia
Splenectomy
B-Cell Chronic Lymphocytic Leukemia
Cell- and Tissue-Based Therapy

Keywords

  • Cd103
  • Cd11c
  • Cd25
  • Hairy cell leukemia
  • Hairy cell leukemia variant
  • Taiwan

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology

Cite this

Hsieh, Y. C., Chang, S. T., Chuang, S. S., Lu, C. L., Tsao, C. J., Lin, C. N., & Li, C. Y. (2011). Hairy cell leukemia and variant in Taiwan: Report of a variant case and literature review. International Journal of Clinical and Experimental Pathology, 4(2), 183-189.

Hairy cell leukemia and variant in Taiwan : Report of a variant case and literature review. / Hsieh, Yen Chuan; Chang, Shen Tsung; Chuang, Shih Sung; Lu, Chin Li; Tsao, Chao Jung; Lin, Ching Nan; Li, Chin Yang.

In: International Journal of Clinical and Experimental Pathology, Vol. 4, No. 2, 2011, p. 183-189.

Research output: Contribution to journalArticle

Hsieh, YC, Chang, ST, Chuang, SS, Lu, CL, Tsao, CJ, Lin, CN & Li, CY 2011, 'Hairy cell leukemia and variant in Taiwan: Report of a variant case and literature review', International Journal of Clinical and Experimental Pathology, vol. 4, no. 2, pp. 183-189.
Hsieh, Yen Chuan ; Chang, Shen Tsung ; Chuang, Shih Sung ; Lu, Chin Li ; Tsao, Chao Jung ; Lin, Ching Nan ; Li, Chin Yang. / Hairy cell leukemia and variant in Taiwan : Report of a variant case and literature review. In: International Journal of Clinical and Experimental Pathology. 2011 ; Vol. 4, No. 2. pp. 183-189.
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