Chlormethine gel is effective for the treatment of skin lesions in patients with early- and late-stage mycosis fungoides in clinical practice

BACKGROUND

Chlormethine gel is a skin-directed therapy used for patients with mycosis fungoides (MF) that showed a favorable risk/benefit profile in a randomized clinical trial. Currently, data on chlormethine gel use in real-world settings are limited.

OBJECTIVES

To assess safety and efficacy of chlormethine gel treatment in patients treated during daily clinical practice, and investigate associations between response and disease stage, lesion type, mono- or combination therapy, and occurrence of dermatitis.

METHODS

Clinical data from patients using chlormethine gel from three sites in Greece were analyzed. Efficacy was assessed through modified Severity-Weighted Assessment Tool (mSWAT) scores. Safety assessments included analysis of the occurrence and severity of dermatitis. The Skindex-29 questionnaire was used for quality-of-life assessments.

RESULTS

Fifty-eight patients were included. The overall response rate (ORR) increased from 37.9% at month 1 to 80.8% at month 9. For 64.2% of patients, response was maintained for at least 4 months (ORR4). At month 3, a higher ORR was seen for patients with patches (69.7%) than patients with plaques/tumors (both 15.2%). A higher ORR4 was observed for patients with early- vs late-stage disease (71.4% vs 36.4%) and patients on mono- vs combination therapy (75% vs 47.6%). Dermatitis was observed in the majority of patients (72.4%), but the presence or severity of dermatitis was not directly correlated with treatment response. Both mSWAT and Skindex-29 scores decreased significantly during treatment, and changes in these scores from baseline to month 6 showed a positive correlation (r = 0.55, P = 0.026).

CONCLUSIONS

Chlormethine gel was effective for treatment of skin lesions in patients with early- and late-stage MF in clinical practice. Response rates increased over time, indicating that continued treatment with the gel is important. Dermatitis may be managed by reducing the treatment frequency; the occurrence of dermatitis did not affect the response to treatment.

The PROCLIPI international registry of early-stage mycosis fungoides identifies substantial diagnostic delay in most patients

BACKGROUND

Survival in mycosis fungoides (MF) is varied and may be poor. The PROCLIPI (PROspective Cutaneous Lymphoma International Prognostic Index) study is a web-based data collection system for early-stage MF with legal data-sharing agreements permitting international collaboration in a rare cancer with complex pathology. Clinicopathological data must be 100% complete and in-built intelligence in the database system ensures accurate staging.

OBJECTIVES

To develop a prognostic index for MF.

METHODS

Predefined datasets for clinical, haematological, radiological, immunohistochemical, genotypic, treatment and quality of life are collected at first diagnosis of MF and annually to test against survival. Biobanked tissue samples are recorded within a Federated Biobank for translational studies.

RESULTS

In total, 430 patients were enrolled from 29 centres in 15 countries spanning five continents. Altogether, 348 were confirmed as having early-stage MF at central review. The majority had classical MF (81·6%) with a CD4 phenotype (88·2%). Folliculotropic MF was diagnosed in 17·8%. Most presented with stage I (IA: 49·4%; IB: 42·8%), but 7·8% presented with enlarged lymph nodes (stage IIA). A diagnostic delay between first symptom development and initial diagnosis was frequent [85·6%; median delay 36 months (interquartile range 12-90)]. This highlights the difficulties in accurate diagnosis, which includes lack of a singular diagnostic test for MF.

CONCLUSIONS

This confirmed early-stage MF cohort is being followed-up to identify prognostic factors, which may allow better management and improve survival by identifying patients at risk of disease progression. This study design is a useful model for collaboration in other rare diseases, especially where pathological diagnosis can be complex.

Clinical characteristics and course of CD8+ cytotoxic variant of mycosis fungoides: a case series of seven patients

BACKGROUND

Fewer than 5% of cases of mycosis fungoides (MF) present with a cytotoxic/suppressor CD8+ phenotype which, despite immunophenotypic similarities with CD8+ aggressive lymphomas, is regarded as a phenotypic variant of MF. Poikilodermatous MF showing a CD8+ phenotype has been reported to have a nonaggressive clinical behaviour and a good response to psoralen plus ultraviolet A treatment.

OBJECTIVES

To perform a retrospective study of CD8+ MF cases diagnosed in the skin lymphoma clinic of Andreas Sygros Hospital.

METHODS

We analysed the clinical characteristics, the immunophenotypic and molecular indices, as well as the clinical course of these patients.

RESULTS

Seven cases of CD8+ MF (6.5% of all cases of cutaneous T-cell lymphoma) were diagnosed during 2002-2007. One of seven patients had stage IA, five stage IB and one stage IIB disease. Clinical characteristics were variable: four of seven patients presented with poikilodermatous plaques (in one of them lesions of lymphomatoid papulosis with CD8+ phenotype coexisted), one patient with classic MF, one with plantar MF and one with follicular MF. The time period between disease onset and diagnosis was long for most patients (up to 33 years). All patients received the recommended treatment according to TNM staging. Five of seven patients had complete remission, one partial response and one stable disease.

CONCLUSIONS

Special clinical characteristics, such as hyperpigmentation and poikiloderma, are often noted in CD8+ MF cases. In our series CD8+ MF presented with a long-standing disease and indolent course suggesting that CD8+ cytotoxic immunophenotype may represent a marker of mild biological behaviour.

New prostaglandins from the chemically defended soft coral Plexaura nina

Three new prostaglandins were isolated as minor constituents of the organic extract from the Caribbean soft coral Plexaura nina. The structures of the new natural products were established by means of spectral data analysis, including 2D NMR experiments. The unpalatability of the lipid extract of the coral and the defensive role of the major prostaglandin metabolites were determined by laboratory and field fish-feeding assays.