# RS3PE Syndrome > RS3PE syndrome — seronegative synovitis with pitting oedema, steroid response and malignancy screening — for NEET-PG Medicine preparation. - Canonical URL: https://prepelephant.com/topics/neet-pg/medicine/rs3pe-syndrome - Exam / course: NEET-PG · Subject: Medicine - Publisher: PrepElephant (https://prepelephant.com) — Prepared and reviewed by the PrepElephant Academic Review Team - First published: 2026-10-02 - Last updated: 2026-10-02 - How to cite: "RS3PE Syndrome", PrepElephant, https://prepelephant.com/topics/neet-pg/medicine/rs3pe-syndrome ## Direct answer Among elderly-onset rheumatological syndromes, RS3PE — remitting seronegative symmetric synovitis with pitting oedema — stands out for one bedside finding: boggy, pitting swelling over the dorsum of both hands, often with matching foot oedema, in a patient over 60 with negative RF and anti-CCP and raised inflammatory markers. It responds dramatically to low-dose prednisolone, but a substantial minority of cases are paraneoplastic, so every new diagnosis deserves a malignancy search — the fact that elevates this from curiosity to NEET-PG Medicine exam material. ## What you must remember - Expansion of the acronym carries the criteria: Remitting, Seronegative, Symmetric Synovitis with Pitting Oedema. - Typical patient: elderly, with a modest male predominance, abrupt bilateral hand stiffness and swelling. - Pitting oedema over the dorsum of both hands and frequently the feet reflects tenosynovitis and synovitis, demonstrable on ultrasound. - RF and anti-CCP negative; ESR and CRP characteristically elevated. - Response to low-dose prednisolone (10–15 mg daily) is rapid and near-complete within days to weeks, with remission on tapering over months. - A significant proportion — quoted around a fifth to a third in series — are paraneoplastic, linked with haematological, gastric, colonic, lung and prostate malignancies. - Paraneoplastic clues: age over 70, weight loss, anaemia, poor or incomplete steroid response, recurrent disease. - In the Indian setting, chronic chikungunya arthritis is a recognised mimic producing RS3PE-like pitting oedema — ask about preceding fever with severe polyarthralgia. ## How to work through a typical case A 72-year-old man presents over three weeks with painful stiffness of both hands; the dorsum of each hand is swollen, tense and pits on pressure, and his shoes no longer fit. He has no distal joint deformity, no psoriasis, no diarrhoea, and no mouth ulcers. ESR is 76 mm/h, CRP 52 mg/L, RF and anti-CCP negative, creatinine normal, urine bland. Step one: distinguish the swelling from arthritis alone — bilateral dorsal pitting oedema with synovitis in an elderly seronegative patient is the syndrome's signature, and ultrasound showing tenosynovitis of extensor compartments supports it. Step two: exclude the mimics systematically: polymyalgia rheumatica (girdle pain and stiffness without dorsal hand oedema), late-onset rheumatoid arthritis (RF/ACPA positive, erosive, pitting oedema unusual), hypothyroid myxoedema (slow, non-tender, TSH abnormal), and chikungunya-related rheumatism in endemic areas — the travel and fever history decides this. Step three: begin prednisolone 12.5–15 mg each morning; the expected near-miraculous response within a week is close to diagnostic, and failure to respond redirects the workup. Step four: hunt malignancy regardless of the response — a reasonable screen includes complete blood count with peripheral smear, chest radiograph, ultrasound abdomen, serum prostate-specific antigen in men, and stool for occult blood, escalating to CT and further evaluation if any red flag appears, because the arthritis may announce a tumour months before it is otherwise evident. Step five: taper slowly over several months, watching for relapse, and cover bone health as with any elderly steroid recipient. ## Where students slip The first error is labelling every elderly person with hand swelling as rheumatoid arthritis and starting methotrexate — the serology, symmetry of oedema rather than synovitis dominance, and the dramatic steroid response argue otherwise. The second, and the one examiners punish hardest, is treating the syndrome as benign and skipping the malignancy screen; a stem that quietly mentions weight loss or a falling haemoglobin is asking for the paraneoplastic association. Third, candidates forget chikungunya: in India, a elderly patient with post-fever chronic polyarthritis and pitting oedema is more likely post-chikungunya than anything exotic, and the history of the index fever with incapacitating joint pain is the discriminator. Finally, do not over-treat — huge steroid doses belong to giant cell arteritis, not RS3PE. ## Frequently asked questions ### What does RS3PE stand for? Remitting seronegative symmetric synovitis with pitting oedema — elderly-onset bilateral hand swelling with negative RF/anti-CCP and an excellent low-dose steroid response. ### Which underlying condition must be excluded in RS3PE? Occult malignancy, since a substantial minority of cases are paraneoplastic; haematological, gastric, colonic, lung and prostate cancers are the classical associations. ### What is the expected treatment response? Rapid and near-complete resolution with low-dose prednisolone around 10–15 mg daily, tapered over months; poor response prompts diagnostic revision. ### Which Indian infection mimics RS3PE? Chikungunya — chronic post-chikungunya inflammatory rheumatism can produce symmetric synovitis with pitting oedema in older adults. ### How is RS3PE distinguished from polymyalgia rheumatica? PMR centres on shoulder and hip girdle pain and stiffness without dorsal hand pitting oedema, whereas RS3PE is a synovitis–tenosynovitis dominated by peripheral oedema of the hand dorsum.