Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 20 - The Lymphatic System and Lymphoid Organs and Tissues - Review Questions - Critical Thinking and Clinical Application Questions - Page 763: 2


- Acute Lymphadenitis ( of the submandibular lymph nodes ). - large infected cut wound on the left check -- infection is carried by lymphatics reach regional lymph nodes ( Submandibular lymph nodes , along the left side of the front of the neck ) - the Submandibular lymph nodes are infected ( tender, swollen, red, hot & firm or soft ).

Work Step by Step

1. Lymphatic Drainage of the Face including the Nose, Cheeks ( left & right ) & upper Lip drain into the buccal & submandibular nodes. ( i.e. left check - submandibular nodes ). 2. Acute Lymphadenitis - infection is carried to lymph nodes along the lymphatics from an inflamed focus. - usually the regional lymph nodes are infected, sometimes , the infection " jumps " to a more distant group of lymph nodes. - the common organisms are streptococci & staphylococci but any other organism can affect the lymph nodes. # Pathology : the nodes are enlarged , congested, edematous & the cut section shows infiltration with Leucocytes. Periadenitis may occur. # Complications : 1- Spread to more proximal Lymph nodes. 2- Spread to nearby tissues. 3- Suppuration ( abscess formation ). 4- the organism may remain dormant in the lymph nodes & flare up every now & then. # Clinical Picture : 1- the picture of the causative lesion. 2- General constitutional manifestations as fever, rigors, & headache. 3- Locally the nodes are enlarged, red, hot, tender, firm or soft & if suppuration occurs, fluctuation will be evident. the intervening Lymphatics between the causative focus & affected lymph nodes may be seen as red streaks which are tender ( Lymphangitis ). # Treatment: - the treatment of the causative focus may cure the the inflamed nodes. - General rest & antibiotics are advised & local heat are applied. - if an abscess forms, an incision is required.
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