|Year : 2016 | Volume
| Issue : 1 | Page : 151-153
Histopathological evaluation of patients with mycosis fungoides before and after phototherapy
Amir-Hoshang Ehsani1, Azita Nikoo2, Hassan Seirafi1, Mohammad Khiabani1, Abbas Karimi1, Alireza Ghanadan3
1 Autoimmune Bullous Diseases Research Center, Department of Dermatology, Razi Dermatology Hospital, Tehran University of Medical Sciences, Tehran, Iran
2 Department of Dermatopathology, Razi Dermatology Hospital, Tehran University of Medical Sciences, Tehran, Iran
3 Department of Dermatopathology, Razi Dermatology Hospital; Department of Pathology, Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
|Date of Web Publication||5-Jul-2017|
Associate professor of Pathology, Department of dermatopathology, Razi Dermatology Hospital, Vahdate Eslami Street, Tehran
Source of Support: None, Conflict of Interest: None
Background and Objectives: Mycosis fungoides (MF) is the most common type of cutaneous lymphoma accompanied by neoplastic T cells. Histopathological changes after phototherapy could be an effective index for evaluation of treatment. The aim of this study was to compare histomorphological changes in Iranian MF patients before and after phototherapy.
Methods: Skin biopsies of 20 diagnosed MF patients in Razi dermatology Hospital of Tehran University of Medical Sciences were evaluated based on major and minor diagnostic criteria using Guitart classification to assess histological features of phototherapy.
Result: Of 20 studied patients eight patients were man and 12 were woman. Following phototherapy, major histologic criteria including density of infiltrate, epidermotropism and lymphocytic atypia along with some minor histologic criteria such as lymphocytic infiltrate and intraepidermal atypical lymphocytes were significantly alleviated after treatment (p < 0.05).
Conclusion: We find a significant decrease in some important histologic parameter of MF after phototherapy, indicating these features may be important diagnostic parameters evaluating therapeutic effect of phototherapy.
Keywords: Mycosis fungoides, Phototherapy, Histopathology
|How to cite this article:|
Ehsani AH, Nikoo A, Seirafi H, Khiabani M, Karimi A, Ghanadan A. Histopathological evaluation of patients with mycosis fungoides before and after phototherapy. Acta Med Int 2016;3:151-3
| Introduction|| |
Cutaneous T-cell lymphoma (CTCL) is classified as a type of non-Hodgkin's lymphoma, a heterogeneous group of lymphoproliferative disorders originating from malignant T lymphocytes. Mycosis fungoides (MF) is the most common type of cutaneous lymphoma. The exact cause of the disease is still not fully understood, but some genetics and epigenetic aberrations may be involved in the development of disease. In skin biopsy mononuclear atypical cells in small to moderate sizes with epidermotropism of single lymphocytes with halo appearance in conjunction with Pautrier's microabscesses are decisive in diagnosis.,, Both ultraviolet A (UVA) and ultraviolet B (UVB) light have showed authenticated efficacy for treating MF., The aim of this study was to evaluate histopathological changes in biopsy taken from MF patients before and after treatment to compare their responses in clinical improvement after phototherapy.
| Materials and Methods|| |
A total of 20 MF diagnosed patients refereeing to Razi Hospital of Tehran University of Medical Sciences between 2010 to 2011 years were studied. Patient records such as age, sex and clinical presentation were overviewed and recorded retrospectively. Lesions biopsies taken from patients were evaluated for histopathological features according to Guitart proposed histological criteria for MF.
Histologic parameters was graded and scored according to the density of infiltrate, epidermotropic lymphocytes atypia as major histologic criteria and reticular fibroplasia of the papillary dermis, lymphocytic infiltrate without inflammatory features, primarily intraepidermal atypical lymphocytes as minor histologic criteria. Each feature was scored with full points suggesting MF as described. Each slide was evaluated by a dermatopathologist (AG) then patients were subjected for phototherapy. Following six months treatment, additional biopsies were performed and slides reviewed by the same dermatopathologist. Later, obtained scores before and after phototherapy were compared and analyzed in SPSS 18 software using Wilcoxon signed-rank test. A significance level of 0.05 was considered for all tests.
| Results|| |
Among 26 MF patients entered into the study, 6 were dropped out from the study in spite of reminding them for taking second biopsy they did not participate to continue the study. Eight out of 20 patients (40%) were males and 12 (60%) were female. The mean age of patients with mycosis fungoides were 45.55 (±20.25) years-old. [Figure 1] demonstrates that the patients with high Guitart's score are shift to low Guitart's score after phototherapy. A statistically significant positive histopathological changes was obtained following phototherapy pointing density of the infiltrate (p=0.002), epidermotropism (p =0.001), lymphocyte atypia (p=0.008), lymphocytic infiltrate without inflammatory features (p=0. 046), primarily intraepidermal atypical lymphocytes (p=0.001) [Table 1]. No change was observed in reticular fibroplasia of the papillary dermis (p = 0.18) after phototherapy [Figure 2]. In addition to above features, some histopasthologic findings are listed in [Table 2].
|Figure 1: The patients number with Guitart's score before and after phototherapy. Note that the patients before phototherapy have higher Guitart's score comparing to after phototherapy|
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|Table 2: Comparison of histopathological changes before and after phototherapy in 20 MF patients in Razi skin hospital|
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| Discussion|| |
There is no standard treatment for MF. Phototherapy with NBUVB and PUVA could be useful and effective in alleviating patches and plaques in treatment-resistant MF., There are not enough studies around histomorphological changes following phototherapy in MF patients. In this study we evaluate therapeutic effect of phototherapy by histologic criteria for MF proposed by Guittar et al to assess post-treatment histopathologic changes. Obtained results showed that all scores of major histologic criteria significantly improved following treatment. Minor histologic criteria such as lymphocytic infiltrate without inflammatory feature and intraepidermal atypical lymphocytes were also significantly alleviated after phototherapy. Our results confirm the study of Zemheri et al in which inflammation and epidermotropism were attenuated after treatment. Although some studies reported papillary dermal fibrosis as a sensitive feature;, similar to Zemheri et al study we showed no change in fibrosis, though not necessarily indicative feature for histopathological evaluation in MF treatment. In addition a number of other features were changed after treatment; since the total number of these feature was small in size to compare them with corresponding features following treatment, so we hesitate to give any comment in this regard.
| Conclusion|| |
Based on the data presented here no side effects such as pigmentation was found after treatment indicating phototherapy as an effective and safe treatment choice for treating MF patients. It be concluded that histological features, including changes in epidermotropism, stratum corneum, epidermis, and dermis, may be good indicative in evaluation of treatment effectiveness for MF phototherapy.
| Acknowledgment|| |
This research has been supported by Tehran University of Medical Sciences & health Services, grant 21635. The manuscript has been read and approved by all the authors and that each author believes that the manuscript represents honest work.
| References|| |
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[Figure 1], [Figure 2]
[Table 1], [Table 2]