Dense-packing hair grafting technique for restoration of cicatricial alopecia

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Zhonghua Zheng Xing Wai Ke Za Zhi 2002 Jul;18(4):219-20

Dense-packing hair grafting technique for restoration of cicatricial alopecia

OBJECTIVE: To investigate the possibility of using dense-packing hair grafting technique for restoration of cicatricial alopecia. METHODS: Under local anesthesia, a scalp strip was harvested from the back of the head. A series of micro-grafts with 1-3 hairs and mini-grafts with 4-6 hairs were created from this strip. In the scarring recipient area, micro-slots were made with a 18 G needle for the micro-grafts and mini-slits were made with a No. 64 mini-blade for the mini-grafts. The grafts were then implanted into these holes. RESULTS: Ninety-six patients with 128 bald scarring areas, resulted from burn, trauma or infection, were treated with the above-mentioned technique from April. 1998 to February. 2000. All of the patients were satisfied with the appearance. In the micro-graft area, the graft density reached 10-15 mini-grafts/cm2 per session. In the micro-graft area, the graft density reached 16-19 micro-grafts/cm2 per session. Postoperative following-up for more than 1 year showed that the grafted hairs were growing well with 90%-95% survival of the hair. One third of the patients obtained satisfactory results with only one session. Two thirds of the patients needed the second session to improve the appearance. CONCLUSIONS: The dense-packing hair grafting technique is a simple, safe and effective method for hair restoration surgery. It is not only used for male pattern baldness, but could also be applied for restoration of cicatricial alopecia.

Dermatol Surg 2002 May;28(5):394-400; discussion 401

A method for evaluating and treating the temporal peak region in patients with male pattern baldness.

BACKGROUND: In the past, hair restoration surgeons have focused most of their attention and efforts on the reconstruction of the hairline region and the area on top of the head. However, little attention has been given to the temporal peaks and the areas immediately posterior to them. OBJECTIVE: The goals of this article are to describe the pattern baldness process at the temporal peaks and the region immediately posterior to them, and to describe a method for the evaluation and treatment of these very important and often neglected areas. METHODS: A method for evaluating and grading the temporal peak region is given. A surgical technique for treating this problem is described. This method consists of making 1.0 mm spear blade incisions at a very acute 10 degrees angle in the newly designed anterior peak and in between the hair follicles that remain in the area posterior to the peak. The grafting of the finest one-haired grafts available in between existing hair follicles is accomplished with the help of 3.5x expandable loupes. The anterior temporal peak design is coordinated with the position of the frontal hairline restoration; the more anterior the hairline, the more anterior the temporal peak and vice-versa. RESULTS: The results of evaluating the temporal peak areas and treating them appropriately have consistently restored the cosmetic harmony between the frontal hairline and the temporal peak region. It is important, however, to only utilize the finest hairs available to create an aesthetically pleasing result. CONCLUSION: When evaluating patients for hair restoration surgery, it should be a common practice to evaluate the temporal peak regions and the areas immediately posterior to them. These areas should be appropriately treated so that the frontal hair restoration coordinates with that of the temporal peak. The further anterior one comes with the hairline, the more anterior must come with the temporal peak restoration and vice-versa.

J Clin Endocrinol Metab 2001 Dec;86(12):5762-4

Production rates of dihydrotestosterone in healthy men and women and in men with male pattern baldness: determination by stable isotope/dilution and mass spectrometry.

Production rates of dihydrotestosterone (DHT) were determined in healthy men (n = 8), in healthy women during the follicular phase of their menstrual cycle (n = 7), and in young men with male pattern baldness (n = 8) using the stable isotope dilution technique and mass spectrometry. [2,3,4-(13)C]DHT was infused for 10 h at doses of 15 microg/h (men) and 2 microg/h (women), and blood samples were obtained at 20-min intervals during the last 4 h of the observation period. Production rates estimated between April and June were 2.9 +/- 1.1 microg/h (women) and 17.8 +/- 6.2 microg/h (men). In men production rates of DHT were similar (16.2 +/- 7.7 microg/h) when the investigation was repeated between October and December. Mean production rates of DHT in young men with male pattern baldness (60 +/- 50 microg/h) were higher than those in healthy men (P < 0.005). Although this group included two individuals with normal production rates of DHT, the production rate of DHT was markedly elevated (range, 32.0-161.0 microg/h) in the remaining patients. Stable isotope-labeled infusions of DHT are suitable for clinical use in a routine setting to obtain analytically correct estimates of DHT production in vivo. In the majority of men with male pattern baldness endogenous production of DHT is markedly increased, providing a rationale for therapeutic 5 alpha-reductase inhibition in this disorder.

Hum Genet. 2003 Apr;112(4):400-3. Epub 2003 Feb 14.

Notch4, a non-HLA gene in the MHC is strongly associated with the most severe form of alopecia areata.

Alopecia areata (AA) is a disorder primarily affecting the hair and nails in which associated autoimmune or atopic disease is common. Genetically, it is a complex trait with evidence of a role for genes of the major histocompatibility complex (MHC), the interleukin-1 cluster and chromosome 21 in the pathogenesis. The strongest association is with HLA class II alleles, although whether this indicates a direct contribution to the pathogenesis or results merely from linkage disequilibrium with nearby disease genes is unknown. Notch4 is a recently defined gene in the HLA class III region. Notch signalling is a direct determinant of keratinocyte growth arrest and entry into differentiation. A possible role for Notch in hair growth has been indicated by transgenic mouse findings that activation of the Notch pathway in the hair cortex leads to aberrant differentiation of adjacent hair-shaft layers. Notch4 is therefore a plausible candidate gene for AA. We have examined two polymorphisms in the coding sequence of the Notch4 gene at positions +1297 and +3063 in a case-control study of 116 AA patients and 142 ethnically matched, healthy control subjects. The initial analysis showed a significant association of AA in the overall data set with the Notch4(T+1297C) polymorphism (P<0.001) but not with Notch4(A+3063G). To confirm this association, we genotyped an additional 62 patients and found that the risk for disease was higher in Notch4(+1297C) homozygotes [odds ratio (OR) 3.43 (1.63, 7.19)] than in heterozygotes [OR 2.58 (1.57, 4.24)]. On classifying the patients by severity of disease, the association appeared to be confined to the severest form (alopecia universalis) [OR 4.02 (1.64, 9.88), P=0.0014]. These results support previous findings showing that different HLA susceptibility alleles are associated with mild and severe AA.

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