Involves tenosynovium, bursa, muscle or deep fascia
Usually associated with immunosuppressed
Reported in wrist, elbow, peroneal and achillis tendons
Often misdiagnosed initially, hence high radiological suspecion is important in the management
Many be due to extension from adjacent joint, bone, bursae, direct inoculation (trauma, syringe)
References:
Varshney MK et al. Isolated tuberculosis of achillis tendon. Joint bone spine: 74: 103-106