الفهرس 
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Abstract
Also, to convey an aesthetic sense of the individual due to its unique arrangement of hair and accessory structure. Therefore loss of all or part of the scalp results in both a functional and aesthetic problem. The past three decades have witnessed two technical advances that have allowed great improvement in the results of reconstruction of the scalp; the evolution of clinical microsurgery and the development and evolution of tissue expansion.
Functional and cosmetic restoration of scalp defects can present a considerable challenge to the reconstructive surgeon.
Main causes of acquired scalp defects include, Trauma and malignancies, Followed by post burn alopecia due to electric burn and lastly, Post graft alopecia.
Acquired scalp defects have been classified according to the site and size of the defect into; Frontal, Vertex, Parietal, Temporal and occipital scalp defects. Each of them can be classified into small scalp defect (<2cm ), moderate scalp defect (>2-< 25cm2) and large scalp defect (>25cm2).
The aim of this work was to study the reconstruction of acquired scalp defects using different surgical techniques in order to achieve a proper plan to facilitate the management of such defects.
This study was carried out for 40 patients, twenty six (65%) patients were males and only fourteen patients (35%) were females.
Patients were subdivided into six unequal groups, According to the site of the acquired scalp defect they have.
1. First group (GD: It included twelve patients with frontal scalp defect, and were managed as: five patients with transposition flaps, three patients with tissue expanded advancement flaps, two patients with direct closure, one patient with rotation flap and one patient with split thickness skin grafts.
2. Second group (G II): It included nine patients with vertex scalp defect, and were managed as: two patients with transposition flaps, three patients with rotation flaps, two patients with direct closure, one patient with split thickness grafts and one patient with free latissimus dorsi flap.
3. Third group (GUT): It included eight patients with parietal scalp defect, and were managed as: five patients with transposition flaps, two patients with tissue expanded advancement flaps and one patient with rotation flap
4. Fourth Group (IV): This group included seven patients who suffered from temporal scalp defect, and were managed as: two patients with rotation flaps, two patients with tissue expanded advancement flap, one patient with transposition flap, one patient with direct closure and one patient with split thickness skin graft.