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Dermatomyositis Presenting as Life-threatening Hypercalcemia
( Harold Henrison Chiu ),( Patricia Pauline Remalante ),( Patricia Nacianceno ),( Rogelio Velasco Jr ),( Ramon Larrazabal Jr ),( Geraldine Zamora ) 대한류마티스학회 2020 대한류마티스학회지 Vol.27 No.4
Dermatomyositis is a rare disease characterized by classic skin lesions and muscle weakness. In rare cases, life-threatening hypercalcemia may develop caused by regression of dystrophic calcifications. Here we report a 36-year-old man who presented with progressive proximal weakness, difficulty in ambulation, and weight loss. He had the V-sign, Gottron’s papules, and hard, chalky nodules on both antecubital, thigh, and hip areas. Laboratory examinations revealed hypercalcemia (3.47 mmol/L) and shortened QT interval. Workup for malignancy and tuberculosis yielded negative results. Biopsy of the antecubital areas revealed calcinosis cutis. Serum calcium levels gradually normalized with hydration and steroids. Our case illustrated that a high index of suspicion for dermatomyositis is warranted for early diagnosis and ascertaining the etiology of hypercalcemia is vital in the management of this life-threatening complication. While hypercalcemia from dermatomyositis may respond to steroids, to date, individualization of treatment remains the standard of care. (J Rheum Dis 2020;27:285-289)
On the sets of lengths of Puiseux monoids generated by multiple geometric sequences
Harold Polo 대한수학회 2020 대한수학회논문집 Vol.35 No.4
In this paper, we study some of the factorization aspects of rational multicyclic monoids, that is, additive submonoids of the nonnegative rational numbers generated by multiple geometric sequences. In particular, we provide a complete description of the rational multicyclic monoids $M$ that are hereditarily atomic (i.e., every submonoid of $M$ is atomic). Additionally, we show that the sets of lengths of certain rational multicyclic monoids are finite unions of multidimensional arithmetic progressions, while their unions satisfy the Structure Theorem for Unions of Sets of Lengths. Finally, we realize arithmetic progressions as the sets of distances of some additive submonoids of the nonnegative rational numbers.