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Idiopathic stabbing headache (ISH) is a primary headache syndrome characterized by transient, sharp, stabbing pains located in the first division of the trigeminal nerve. Reports of pediatric ISH are rare, and extracephalic pain in pediatric ISH is extremely rare. Here we report the case of a 7-year-old male patient suffering from frequent, short, stabbing headache, which was occasionally associated with abdominal and lower back pain. Various investigations were normal. He was diagnosed with ISH, and valproic acid was administered to relieve his headache and accompanying symptoms. Our case demonstrates that abdominal and lower back pain may occur in pediatric ISH. This case may provide new evidence linking ISH and migraine by showing that extracephalic symptoms accompanying ISH are similar to those of migraine. We hypothesize that the mechanism underlying the headache and abdominal and lower back pain associated with ISH may be similar to that of a migraine headache. Accumulating additional cases by asking specific questions regarding the presence of the unusual symptoms presented in our case may help to establish a detailed clinical profile of these unfamiliar and peculiar symptoms in the pediatric ISH population.

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The symptoms and prevalence of migraine headaches are widely recognized; however, less is known about migraine-related spontaneous body pain, or migrainous corpalgia. Only a few reports have described it. The case of a 13-year-old boy with onset of migrainous corpalgia at the age of 12 years is presented. He suffered from pulsatile headaches and bilateral lower back pain, which would appear either with the headache or as an isolated symptom. Various medical examinations showed no abnormalities. He was diagnosed as having migraine without aura and successfully treated with valproic acid. It is unique for this patient to have lower back pain as a symptom of migrainous corpalgia. It would be important for physicians to understand the variety of pain symptoms in migraine patients, as shown here, for better and comprehensive understanding of migraine and its related condition.

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Kawasaki Disease (KD) is acute, febrile, multisystem vasculitis of early childhood, the detailed mechanism of which is still unclear. Skin symptoms occur in KD, such as edema of the hands and feet with subsequent desquamation and redness at the inoculation site of bacillus Calmette-Guerin (BCG). The change at the BCG inoculation site has been considered as a specific feature of KD, although its mechanism is not fully understood. We present an 11-month-old boy who developed fever with redness of the BCG site due to infection with human herpes virus type 6 (HHV6). At the age of 3 months, the patient received BCG. His fever remitted 7 days after the onset of skin redness, with sequential desquamation at the BCG site and extremities, which is not a common feature of HHV6 infection that typically lasts for 3 days. The final diagnosis was exanthema subitum. Characteristically, the HHV6 infection in our patient appeared to be associated with the invigoration of the T cell system, as represented by the elevated serum levels of soluble interleukin-2 receptor (3,490 U/ml vs. normal range 145-519 U/ml). This patient clearly showed redness and crusting at the BCG inoculation site, suggesting that HHV6 infection might cause skin changes similar to those of KD via an unknown mechanism. In addition, we suggest that the activation of the T cell system may account for the skin lesions in KD, characterized by redness and subsequent crusting of the BCG inoculation site and desquamation of the extremities.

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Gynecomastia or benign proliferation of the male breast glandular tissue is not uncommon for adolescent males. Its pathogenesis has been attributed to a transient imbalance between estrogens and androgens. Ginseng is a popular herb with a long history of medicinal use. Oriental folk medicine describes it as both a tonic for restoring strength and a panacea. The term "ginseng" generally refers to a plant, Panax ginseng. Based on estrogen-like actions of Panax ginseng due to its structural similarity with estradiol, this agent could be speculated to cause gynecomastia. Here we report a 12-year-old Korean-Japanese boy with bilateral enlargement of the breasts with tenderness in the right breast, which was noticed about 1 month before his first visit to our outpatient clinic. He was diagnosed with gynecomastia based on physical, laboratory, and ultrasound examinations. Detailed questioning about his medications and supplements revealed that he had been given red ginseng extract daily to enhance his performance for 1 month before his clinical presentation. He wanted to make his body stronger as an athlete. He was recommended from his grandmother to take Panax ginseng for his purpose. After stopping this, there was no further growth of the masses and no pain when his right breast was pressed. In conclusion, physicians should consider ginseng in the investigation of gynecomastia.

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