1) Myofascial pain syndrome - anterior upper thigh pain spreading to the anterior knee in adductor longus and brevis MFPS, anterior thigh pain spreading from groin to medial knee in adductor magnus MFPS, upper posterior thigh pain starting from buttocks in gluteus medius MFPS, posterior thigh pain, lateral thigh pain, lateral knee pain, popliteal pain, calf pain, buttock pain in gluteus minimus MFPS, medial thigh pain in gracilis MFPS, upper posterior thigh pain spreading down popliteal fossa and calf in semitendinosus and semimembranosus MFPS, posterior thigh pain starting from popliteal fossa and spreading up in biceps femoris MFPS, anterior thigh pain upper 1/3rd and lumbar paraspinal region pain in iliopsoas MFPS, upper 1/3rd anterior thigh pain in pectineus MFPS, posterior thigh pain starting from buttocks and spreading down in piriformis MFPS, posterior thigh pain starting from buttocks in quadratus lumborum, glut max, levator ani, piriformis MFPS, anterior thigh pain starting from anterior knee in rectus femoris MFPS, anterior thigh pain spreading fom upper 1/3rd to lower 1/3rd in sartorius MFPS, posterior thigh pain starting from the sacral area in sphnicter ani, levator ani, coccygeus, obturator internus (SALACO complex), lateral thigh pain in tensor fasciae latae MFPS, lateral thigh pain, lateral knee pain, lateral hip pain, lateral leg pain in vastus lateralis MFPS, anterior thigh pain, anterior knee pain in vastus medialis MFPS, anterior thigh pain in vastus intermedius MFPS. See notes under myofascial pain syndrome for diagnostic criteria and treatment.