Schilddrüsen-Check (Thyroid TSH)

A single-marker thyroid screening test measuring TSH (thyroid-stimulating hormone). TSH is the most sensitive first-line indicator of thyroid dysfunction — elevated levels suggest hypothyroidism while suppressed levels point toward hyperthyroidism. This test is the standard starting point before proceeding to the full thyroid panel if results are abnormal.

Thyroid disorders affect an estimated 10 to 15 percent of the German population, yet many cases go undiagnosed for years because early symptoms — fatigue, weight changes, mood shifts, hair thinning — overlap with dozens of other conditions. TSH measurement cuts through this diagnostic ambiguity because it reflects the pituitary gland's real-time assessment of whether circulating thyroid hormone levels are adequate. When the thyroid gland underperforms, TSH rises as the pituitary attempts to stimulate more hormone production. Conversely, an overactive thyroid suppresses TSH because the pituitary detects excess circulating hormone and reduces its stimulatory signal. This inverse relationship makes TSH the single most sensitive screening marker for both hypo- and hyperthyroidism, catching dysfunction before free T3 and free T4 levels move outside their reference ranges. SYNLAB München Zentrum performs TSH analysis using immunoassay technology with results typically returned within one to two working days. No fasting is required, though morning draws are preferred for consistency as TSH follows a circadian rhythm with peak levels in the early morning hours. If TSH falls outside the reference range, the Schilddrüsen-Profil (full thyroid panel with fT3 and fT4) is the recommended follow-up.