Derm: Mycosis Fungoides: Free MSRA Podcast

✅ MSRA Deep Dive: Mycosis Fungoides – The Great Dermatological MimickerIn this focused episode, we tackle Mycosis Fungoides (MF) – the most common type of cutaneous T-cell lymphoma (CTCL). Often mistaken for eczema or psoriasis, MF is a high-yield MSRA topic. We break down its presentation, investigation, and UK-based management in a way that’s easy to retain for exam prep and clinical practice.🧠 Key Learning Points📌 Definition• MF is a slow-growing non-Hodgkin lymphoma that originates from malignant CD4+ T-cells in the skin.• It presents in stages: patches → plaques → tumours.📌 Associated Condition• Sézary Syndrome: a more aggressive CTCL with erythroderma, lymphadenopathy, and circulating malignant T-cells.🧬 Pathophysiology• Malignant CD4+ T-helper cells undergo clonal expansion and home to the skin, causing visible lesions.• Disease may later spread to nodes or internal organs.⚠️ Risk Factors & Epidemiology• No known clear risk factors.• Typically affects adults over 50, more common in men.• UK incidence: 0.5–1 per 100,000/year.• MF accounts for ~50% of CTCL cases.🔍 Clinical Features• Red, scaly patches or plaques, especially in sun-protected areas (e.g. buttocks, trunk).• Severe pruritus is common.• Advanced disease may involve tumours, lymphadenopathy, systemic symptoms.🧠 Differential DiagnosesMF can mimic:• Psoriasis, eczema, lichen planus, parapsoriasis, drug rashes• Other lymphomas (Sézary, anaplastic large-cell)• Benign dermatoses (vitiligo, morphea, pityriasis lichenoides)✅ Think MF in persistent, treatment-resistant rashes in unusual areas.🧪 Investigations• Skin biopsy: confirms diagnosis by showing epidermotropism and Pautrier’s microabscesses• Immunohistochemistry, TCR gene rearrangement confirm clonality• Bloods (LFTs, uric acid), CT if systemic signs present• Biopsy of lymph nodes/bone marrow only if spread is suspected💊 Management🎯 Early-stage (IA–IIA)• Topical corticosteroids, retinoids (e.g. bexarotene), phototherapy (PUVA/UVB)• Topical chemotherapy: nitrogen mustard or carmustine• Symptom relief: emollients, antihistamines🎯 Advanced/refractory disease (IIB–IV)• Systemic options: interferon, oral retinoids, low-dose chemotherapy• Extracorporeal photopheresis (ECP)• Stem cell transplant: rare, selected patients❌ Combination chemo avoided – high toxicity, low benefit📈 Prognosis• Stage IA/IB: ~80% 5-year survival• Later stages: poorer outlook with higher complication risk• Long-term follow-up needed – MF often relapses⚠️ Complications• Skin infections (bacterial, fungal, viral)• Secondary cancers: melanoma, SCC, colon, other lymphomas• Systemic spread (nodes, liver, spleen)• Psychological impact and treatment side effects (e.g. immunosuppression)🔁 Follow-Up• Lifelong dermatology monitoring• Watch for recurrence, transformation, or other malignancies🩺 Practical Exam TipPersistent "eczema" or "psoriasis" in unusual sites (e.g. buttocks, trunk), treatment-resistant, with intense itching = suspect MF. Consider dermatology referral and biopsy.📚 MSRA Revision Resources📄 Notes: https://www.passthemsra.com/topic/mycosis-fungoides-revision-notes/💬 Flashcards: https://www.passthemsra.com/topic/mycosis-fungoides-flashcards/🧠 Accordion Q&A: https://www.passthemsra.com/topic/mycosis-fungoides-accordion-qa-notes/📝 Quiz: https://www.passthemsra.com/topic/mycosis-fungoides-rapid-quiz/🎯 Full Quiz: https://www.passthemsra.com/quizzes/mycosis-fungoides/📘 Dermatology Course: https://www.passthemsra.com/courses/dermatology-for-the-msra/🏷️ Hashtags#MSRA #MSRARevision #MSRAQuiz #MycosisFungoides #CutaneousLymphoma #CTCL #Dermatology #MSRAFlashcards #PassTheMSRA #FreeMSRA #SkinLymphoma #TCellLymphoma