An explanation of some of the more unusual syndromes and terms used in classical texts:
--------------------------------------------------------Abdominal Masses (癥瘕, Zheng Jia / 积聚, Ji Ju)
--------------------------------------------------------Alchemy (煉丹 Lian Dan)
--------------------------------------------------------Back Shu Points (背俞穴, Bei Yu Xue)
--------------------------------------------------------Brain Wind (腦風, Nao Feng)
--------------------------------------------------------Breast Shu Points (膺俞穴, Ying Yu Xue)
--------------------------------------------------------Chest and Abdomen Qi Streets (胸腹氣街 Xiong Fu Qi Jie)
--------------------------------------------------------Cheng Fu (承負, Inherited Burdens)
--------------------------------------------------------Chest Shu Points (前俞穴, Qian Yu Xue)
--------------------------------------------------------Childhood Fright Wind (驚風, Jing Feng)
--------------------------------------------------------Cold Damage (傷寒, Shang Han)
--------------------------------------------------------Counterflow Qi (逆氣, Ni Qi or 氣厥, Qi Jue)
--------------------------------------------------------Crane's Knee Wind (鶴膝風, He Xi Feng)
--------------------------------------------------------Curious Organs (名奇恆之府, Heng Qi Ming Zi Fu)
--------------------------------------------------------Deficiency Taxation (虛勞, Xu Lao)
--------------------------------------------------------Dian Kuang (癲狂, Madness)
--------------------------------------------------------Doorways to the Earth (地門, Di Men)
--------------------------------------------------------Dysenteric Disorder (痢疾, Li Ji)
--------------------------------------------------------Eight Formations (八阵, Ba Zhen)
--------------------------------------------------------Eight Methods (八法, Ba Fa)
--------------------------------------------------------Eight Principles of Syndrome Differentiation (八綱辨證, Ba Gang Bian Zheng)
--------------------------------------------------------Eighteen Pathologies (十八病, Shi Ba Bing)
--------------------------------------------------------Five Corpse Disorders (五屍症, Wu Shi Zheng)
--------------------------------------------------------Five Palm Heat (五心热, Wu Xin Re)
--------------------------------------------------------Five Taxations (五勞, Wu Lao)
--------------------------------------------------------Flowers of Heaven (天花, Tian Hua)
--------------------------------------------------------Foetal Toxin (胎毒, Tai Du)
--------------------------------------------------------Four Seas (四海, Si Hai)
--------------------------------------------------------Fox Confusion Disease (狐惑病, Hu Huo Bing)
--------------------------------------------------------Front Mu Points (募穴, Mu Xue)
--------------------------------------------------------Gao Wu Command Points (高武总穴, Gao Wu Zong Xue)
--------------------------------------------------------Ghosts (鬼, Gui)
--------------------------------------------------------Ghost Points (鬼穴, Gui Xue)
--------------------------------------------------------Ghost Talk (鬼談, Gui Tan)
--------------------------------------------------------Gu (蠱, Poison)
--------------------------------------------------------Head Qi Streets (頭氣街 Tou Qi Jie)
-------------------------------------------------------- --------------------------------------------------------Hui-Meeting Points (八会穴, Ba Hui Xue)
--------------------------------------------------------Hun (魂, Ethereal Soul)
--------------------------------------------------------Infantile Malnutrition (小儿疳积, Xiao Er Gan Ji)
--------------------------------------------------------Leg/Foot Qi (腳氣, Jiao Qi / 足氣, Zu Qi)
--------------------------------------------------------Lily Disorder (百合病, Bai He Bing)
--------------------------------------------------------Lotus Flower Tongue (蓮花舌, Lian Hua She)
--------------------------------------------------Luo (絡, Connecting Points)
--------------------------------------------------------Ma Dan-Yang Heavenly Star Points (馬丹陽天星穴, Ma Danyang Tian Xing Xue)
--------------------------------------------------------Mo Yuan (膜源, Membrane Source)
--------------------------------------------------------Nine Palaces (九宫, Jiu Gong)
--------------------------------------------------------Nine Points for Returning Yang (回阳九针穴, Hui Yang Jiu Zhen Xue)
-------------------------------------------------------- --------------------------------------------------------Nue (瘧, Malarial Disorders)
--------------------------------------------------------Painful Obstruction (痹, Bi)
--------------------------------------------------------Pathogenic Qi (邪氣, Xie Qi)
--------------------------------------------------------Plumstone Qi (梅核氣, Mei He Qi)
--------------------------------------------------------Po (魄, Corporeal Soul)
--------------------------------------------------------Restless Zang Disorder (脏躁, Zang Zao)
--------------------------------------------------------Running Piglet Qi (奔豚氣, Ben Tun Qi)
--------------------------------------------------------Seven Emotions (七情, Qi Qing)
--------------------------------------------------------Seven Injuries (七傷, Qi Shang)
--------------------------------------------------------Shan (疝, Hernia)
--------------------------------------------------------Shen (神, Spirit)
--------------------------------------------------------Shin Qi Streets (脛氣街 Jing Qi Jie)
--------------------------------------------------------Shu-Transport Points (五輸穴, Wu Shu Xue)
--------------------------------------------------------Six Desires (六欲, Liu Yu)
--------------------------------------------------------Six Healing Sounds (六字訣, Liu Zi Jue) / Transcendental Whistling (長嘯, Chang Xiao)
--------------------------------------------------------Six Qi (六氣, Liu Qi) / Six Changes (六化, Liu Hua) / Six Excesses (六淫, Liu Yin) / Six Extremes (六極, Liu Ji)
--------------------------------------------------------Sores and Boils (瘡瘍, Chuang Yang)
--------------------------------------------------------Steaming Bone Disorder (骨蒸, Gu Zheng)
--------------------------------------------------------Sudden Turmoil Disorder (霍亂, Huo Luan)
--------------------------------------------------------Superficial Visual Obstruction (目翳, Mu Yi)
--------------------------------------------------------Taxation Fever (勞热, Lao Re)
--------------------------------------------------------The Three Doshas (त्रिदो, tridoṣa)
--------------------------------------------------------The Three Treasures (三寶, San Bao)
--------------------------------------------------------Three Corpses / Three Worms (三屍, San Shi / 三蟲, San Chong)
--------------------------------------------------------Throat Moth (喉蛾 Hou E)
--------------------------------------------------------Throat Painful Obstruction (喉痹, Hou Bi)
--------------------------------------------------------Tidal Fever (潮热, Chao Re)
--------------------------------------------------------Toxicity (毒, Du)
--------------------------------------------------------Twelve Excesses (十二淫, Shi Er Yin)
--------------------------------------------------------Visual Dizziness (目眩, Mu Xuan)
--------------------------------------------------------Wasting and Thirsting (消渴, Xiao Ke)
--------------------------------------------------------White Tiger Joint Wind (白虎風病, Bai Hu Feng Bing)
--------------------------------------------------------Wind Taxation (風勞, Feng Lao)
--------------------------------------------------------Windows to Heaven (天牖, Tian You)
--------------------------------------------------------Windstroke (中風, Zhongfeng)
--------------------------------------------------------Xi-Cleft Points (郗穴, Xi Xue)
--------------------------------------------------------Yi Jing (易經, The Classic of Changes)
--------------------------------------------------------Yuan-Source Points (原穴, Yuan Xue)
--------------------------------------------------------Upright Qi (正氣, Zheng Qi)
--------------------------------------------------------Zuo Huo Ru Mo (走火入魔, Obsession-Possession) / Qi Gong Pian Cha (氣功偏差, Qi Gong Deviation)
--------------------------------------------------------Additional information can be found on some of the source sites I used to collate this information. Many of the characters for technical terms have been found using Wikibooks TCM Terms and Heyttu TCM Dictionary.