Influence of sex on the pattern of joint involvement and extra-articular manifestations in Egyptian patients with RA. States of adrenal secretion of cortisol in patients with RA. Study of serum Interleukin – 12 concentration in juvenile RA. Serum nitric oxide assessment in patients with Rheumatoid arthritis and osteoarthritis. SFas/ APO-1 / CD95 in SLE and its relation to disease activity. Bone turnover markers in healthy , osteopenic and osteoprotic post-menopausal women; comparison between serum carboxyterminal telopeptide of type 1 collagen and urinary pyridinium cross-links. Sonographic Patterns of finger tendon involvement in RA. Modes of presentation and systemic involvement in Egyptian patients with Behcet´s disease Inter- relation between psychiatric morbidity with IL-6 and TNF α in SLE disease activity. MAGNETIC RESONANCE SPECTROSCOPY IN EVALUATION OF NEUROPSYCHIATRIC SYSTEMIC LUPUS ERYTHEMATOSUS