<prompt> True about lymphatic spread of Ca breastAxillary nodes are most commonly involvedInternal mammary nodes are also involvedSpread occurs to supraclavicular LN by lymphatic embolisationAll of the above  <response>: Lymphatic spread occurs through: Subareolar Sappeys lymphatic plexus presently its Significance is discounted. Cutaneous lymphatics. Intramammary lymphatics. Lymphatic drainage of the breast is predominantly through axillary 75 and internal mammary lymph nodes. Axillary group of nodes are: 1. Anterior along lateral thoracic vessels Pectoral. 2. Central embedded in fat in the centre of the axilla. 3. Posterior along subscapular vessels. 4. Lateral along axillary vein. 5. Apical lies above pectoralis minor tendon in continuity with the lateral nodes and receive efferents from all the groups. Spread to these lymph nodes occur by lymphatic permeation. Interpectoral, lies between pectoralis major and minor muscle Rotters nodes. Presently involvement of these lymph nodes are considered due to retrograde spread. These lymph nodes are cleared during Pateys mastectomy. From axillary lymph nodes spread occurs to supra clavicular lymph nodes by lymphatic embolisation. Ref; page no; 536 5th edition of SRB;S manual of Surgery 