Includes legions of infectious, inflammatory, and malignant causes.
Common infectious agents that cause chronic nodular skin lesions include fungal, mycobacterial and norcardiosis.
Gardeners may have sporotrichosis or norcardiosis.
Leishmaniasis, myiasis, and visceral larva migraines skin lesions may be associated.
May be seen with inflammatory nodules of this erythematosus profundus and cutaneous polyarteritis.
Mycobacterium marinum a waterborne organism found in swimming pools fish tanks, instill was stagnant water can lead to swimming pool granuloma and fish tank granuloma.